- Bisaryldiketene derivatives: A new class of selective ligands for c-myc G-quadruplex DNA
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A series of bisaryldiketene derivatives were designed and synthesized as a new class of specific G-quadruplex ligands. The ligand-quadruplex interactions were further evaluated by FRET, ITC, and PCR stop assay. In contrast to most of the G-quadruplex ligands reported so far, which comprise an extended aromatic ring, these compounds are neither polycyclic nor macrocyclic, but have a non-aromatic and relative flexible linker between two quinoline moieties enabling the conformation of compounds to be flexible. Our results showed that these bisaryldiketene derivatives could selectively recognize G-quadruplex DNA rather than binding to duplex DNA. Moreover, they showed promising discrimination between different G-quadruplex DNA. The primary binding affinity of ligand M2 for c-myc G-quadruplex DNA was over 200 times larger than that for telomere G-quadruplex DNA.
- Peng, Dan,Tan, Jia-Heng,Chen, Shuo-Bin,Ou, Tian-Miao,Gu, Lian-Quan,Huang, Zhi-Shu
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Read Online
- Oxidation of alcohols to aldehydes with bromoisobutyrate and dimethyl sulfoxide
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We have developed an efficient oxidation of primary alcohols to aldehydes with ethyl bromoisobutyrate and dimethyl sulfoxide. Diaryl ketone can also be prepared under this reaction system.
- Wu, Fei-Yue,Chen, Xiao-Hui,Zhou, Hai-Mei,Li, Jia-Qin,Cui, Hai-Lei
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supporting information
(2021/09/29)
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- Selective Electrochemical Oxygenation of Alkylarenes to Carbonyls
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An efficient electrochemical method for benzylic C(sp3)-H bond oxidation has been developed. A variety of methylarenes, methylheteroarenes, and benzylic (hetero)methylenes could be converted into the desired aryl aldehydes and aryl ketones in moderate to excellent yields in an undivided cell, using O2 as the oxygen source and lutidinium perchlorate as an electrolyte. On the basis of cyclic voltammetry studies, 18O labeling experiments, and radical trapping experiments, a possible single-electron transfer mechanism has been proposed for the electrooxidation reaction.
- Li, Xue,Bai, Fang,Liu, Chaogan,Ma, Xiaowei,Gu, Chengzhi,Dai, Bin
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supporting information
p. 7445 - 7449
(2021/10/02)
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- Potent Inhibition of Nicotinamide N-Methyltransferase by Alkene-Linked Bisubstrate Mimics Bearing Electron Deficient Aromatics
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Nicotinamide N-methyltransferase (NNMT) methylates nicotinamide (vitamin B3) to generate 1-methylnicotinamide (MNA). NNMT overexpression has been linked to a variety of diseases, most prominently human cancers, indicating its potential as a therapeutic target. The development of small-molecule NNMT inhibitors has gained interest in recent years, with the most potent inhibitors sharing structural features based on elements of the nicotinamide substrate and the S-adenosyl-l-methionine (SAM) cofactor. We here report the development of new bisubstrate inhibitors that include electron-deficient aromatic groups to mimic the nicotinamide moiety. In addition, a trans-alkene linker was found to be optimal for connecting the substrate and cofactor mimics in these inhibitors. The most potent NNMT inhibitor identified exhibits an IC50 value of 3.7 nM, placing it among the most active NNMT inhibitors reported to date. Complementary analytical techniques, modeling studies, and cell-based assays provide insights into the binding mode, affinity, and selectivity of these inhibitors.
- Buijs, Ned,Campagna, Roberto,Emanuelli, Monica,Gao, Yongzhi,Innocenti, Paolo,Jespers, Willem,Martin, Nathaniel I.,Parsons, Richard B.,Sartini, Davide,Van Haren, Matthijs J.,Van Westen, Gerard J. P.,Zhang, Yurui,Gutiérrez-De-Terán, Hugo
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p. 12938 - 12963
(2021/09/11)
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- Imidazopyridine-fused [1,3]diazepinones: modulations of positions 2 to 4 and their impacts on the anti-melanoma activity
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A series of 19 novel pyrido-imidazodiazepinones, with modulations of positions 2, 3 and 4 of the diazepine ring were synthesised and screened for their in vitro cytotoxic activities against two melanoma cell lines (A375 and MDA-MB-435) and for their poten
- Ali, Lamiaa M. A.,Baccon-Sollier, Paul Le,Cuq, Pierre,Lichon, Laure,Malki, Yohan,Masurier, Nicolas,Maye, Morgane,Vincent, Laure-Ana?s
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p. 935 - 949
(2020/04/17)
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- A Simple, Mild and General Oxidation of Alcohols to Aldehydes or Ketones by SO2F2/K2CO3 Using DMSO as Solvent and Oxidant
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A practical, general and mild oxidation of primary and secondary alcohols to carbonyl compounds proceeds in yields of up to 99% using SO2F2 as electrophile in DMSO as both the oxidant and the solvent at ambient temperature. No moisture- and oxygen-free conditions are required. Stoichiometric amount of inexpensive K2CO3, which generates easy to separate by-products, is used as the base. Thus, 5-gram scale runs proceeded in nearly quantitative yields by a simple filtration as the work-up. The use of a polar solvent such as DMSO, which usually promotes competing Pummerer rearrangement, is also noteworthy. This protocol is compatible with a variety of common N-, O-, and S-functional groups on (hetero)arene, alkene and alkyne substrates (68 examples). The protocol was applied (99% yield) to a formal synthesis of the important cholesterol-lowering drug Rosuvastatin. (Figure presented.).
- Zha, Gao-Feng,Fang, Wan-Yin,Leng, Jing,Qin, Hua-Li
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supporting information
p. 2262 - 2267
(2019/04/17)
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- Visible-Light-Promoted Nickel- and Organic-Dye-Cocatalyzed Formylation Reaction of Aryl Halides and Triflates and Vinyl Bromides with Diethoxyacetic Acid as a Formyl Equivalent
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A simple formylation reaction of aryl halides, aryl triflates, and vinyl bromides under synergistic nickel- and organic-dye-mediated photoredox catalysis is reported. Distinct from widely used palladium-catalyzed formylation processes, this reaction proceeds by a two-step mechanistic sequence involving initial in situ generation of the diethoxymethyl radical from diethoxyacetic acid by a 4CzIPN-mediated photoredox reaction. The formyl-radical equivalent then undergoes nickel-catalyzed substitution reactions with aryl halides and triflates and vinyl bromides to form the corresponding aldehyde products. Significantly, besides aryl bromides, less reactive aryl chlorides and triflates and vinyl halides serve as effective substrates for this process. Since the mild conditions involved in this reaction tolerate a plethora of functional groups, the process can be applied to the efficient preparation of diverse aromatic aldehydes.
- Huang, He,Li, Xiangmin,Yu, Chenguang,Zhang, Yueteng,Mariano, Patrick S.,Wang, Wei
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supporting information
p. 1500 - 1505
(2017/02/05)
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- A Convenient Palladium-Catalyzed Reductive Carbonylation of Aryl Iodides with Dual Role of Formic Acid
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Palladium-catalyzed reductive carbonylation of aryl halides represents a straightforward pathway for the synthesis of aromatic aldehydes. The known reductive carbonylation procedures either require CO gas or complexed compounds as CO sources. In this communication, we developed a palladium-catalyzed reductive carbonylation of aryl iodides with formic acid as the formyl source. As a convenient, practical, and environmental friendly methodology, no additional silane or H2 was required. A variety of aromatic aldehydes were isolated in moderate to excellent yields under mild reaction conditions. Notably, this is the first procedure on using formic acid as the formyl source. Say no to CO gas! A convenient, practical, and environmental friendly palladium-catalyzed reductive carbonylation of aryl iodides with formic acid as the formyl source has been developed (see scheme). No additional silane or H2 was required here. A variety of aromatic aldehydes were isolated in moderate to excellent yields under mild reaction conditions.
- Qi, Xinxin,Li, Chong-Liang,Wu, Xiao-Feng
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supporting information
p. 5835 - 5838
(2016/04/26)
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- Synthesis and anti-norovirus activity of pyranobenzopyrone compounds
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During the last decade, noroviruses have gained media attention as the cause of large scale outbreaks of gastroenteritis on cruise ships, dormitories, nursing homes, etc. Although noroviruses do not multiply in food or water, they can cause large outbreaks because approximately 10-100 virions are sufficient to cause illness in a healthy adult. Recently, it was shown that the activity of acyl-coenzyme A:cholesterol acyltransferase-1 (ACAT1) enzyme may be important in norovirus infection. In search of anti-noroviral agents based on the inhibition of ACAT1, we synthesized and evaluated the inhibitory activities of a class of pyranobenzopyrone molecules containing amino, pyridine, substituted quinolines, or 7,8-benzoquinoline nucleus. Three of the sixteen evaluated compounds possess ED50 values in the low micrometer range. 2-Quinolylmethyl derivative 3A and 4-quinolylmethyl derivative 4A showed ED50 values of 3.4 and 2.4 μM and TD50 values of >200 and 96.4 μM, respectively. The identified active compounds are suitable for further modification for the development of anti-norovirus agents.
- Pokhrel, Laxman,Kim, Yunjeong,Nguyen, Thi D.T.,Prior, Allan M.,Lu, Jianyu,Chang, Kyeong-Ok,Hua, Duy H.
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supporting information; experimental part
p. 3480 - 3484
(2012/07/03)
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- (E)-5-styryl-1H-indole and (E)-6-styrylquinoline derivatives serve as probes for β-amyloid plaques
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We report the synthesis and biological evaluation of novel (E)-5-styryl-1H-indole and (E)-6-styrylquinoline derivatives as probes for imaging β-amyloid (Aβ) plaques. These derivatives showed binding affinities for Aβ1-40 aggregates with Ki values varying from 4.1 to 288.4 nM. (E)-5-(4-iodostyryl)-1H-indole (8) clearly stained Aβ plaques in the brain sections of Alzheimer's disease (AD) model mice (APP/PS1). Furthermore, autoradiography for [125I]8 displayed intense and specific labeling of Aβ plaques in the brain sections mentioned above with low background. In biodistribution experiments using normal mice [ 125I]8 showed high initial brain uptake followed by rapid washout (4.27 and 0.64% ID/g at 2 and 30 min post injection, respectively). These findings suggests that [123I]8 may be a potential SPECT imaging agent for detecting Aβ plaques in AD brain.
- Yang, Yang,Jia, Hong-Mei,Liu, Bo-Li
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experimental part
p. 4252 - 4265
(2012/07/03)
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- METHODS OF USING DIHYDROPYRIDOPHTHALAZINONE INHIBITORS OF POLY (ADP-RIBOSE)POLYMERASE (PARP)
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Provided herein are methods of treating cancer comprising administering a topoisomerase inhibitor, temozolomide, or a platin in combination with a Compound of Formula (I) or Formula (II), where the substituents Y, Z, A, B, R1, R2, R3, R4 and R5 are as defined herein.
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Page/Page column 185
(2011/11/01)
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- Quinolinyl and quinolinyl N-oxide chalcones: Synthesis, antifungal and cytotoxic activities
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A series of new 6-quinolinyl and quinolinyl N-oxide chalcones were efficiently prepared. All chalcones were tested by minimal inhibitory concentration (MIC) against three species of Candida, Cryptococcus gattii and Paracoccidioides brasiliensis. The effec
- De Carvalho Tavares, Luciana,Johann, Susana,Maria De Almeida Alves, Tania,Guerra, Juliana Correia,Maria De Souza-Fagundes, Elaine,Cisalpino, Patrícia Silva,Bortoluzzi, Adailton J.,Caramori, Giovanni F.,De Mattos Piccoli, Rafael,Braibante, Hugo T.S.,Braibante, Mara E.F.,Pizzolatti, Moacir G.
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scheme or table
p. 4448 - 4456
(2011/11/06)
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- DIHYDROPYRIDOPHTHALAZINONE INHIBITORS OF POLY(ADP-RIBOSE)POLYMERASE (PARP)
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A compound having the structure set forth in Formula (I) and Formula (II): wherein the substituents Y, Z, A, B, R1, R2, R3, R4 and R5 are as defined herein. Provided herein are inhibitors of poly(ADP-ribose)polymerase activity. Also described herein are pharmaceutical compositions that include at least one compound described herein and the use of a compound or pharmaceutical composition described herein to treat diseases, disorders and conditions that are ameliorated by the inhibition of PARP activity.
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Page/Page column 94
(2010/03/02)
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- NONPEPTIDIC INHIBITORS OF CRUZAIN
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Cruzain is the major cysteine protease of T. cruzi, which is the causative agent of Chagas' disease and is a promising target for the development of new chemotherapy. With the goal of developing potent nonpeptidic inhibitors of cruzain, the Substrate Activity Screening (SAS) method was used to screen a library of protease substrates initially designed to target the homologous human protease cathepsin S. Structure-based design was next used to further improve substrate cleavage efficiency by introducing additional binding interactions in the S3 pocket of cruzain. The optimized substrates were then converted to inhibitors by the introduction of cysteine protease mechanism-based pharmacophores. Inhibitor (38) was determined to be reversible even though it incorporated the vinyl sulfone pharmacophore that is well documented to give irreversible cruzain inhibition for peptidic inhibitors. The previously unexplored β-chloro vinyl sulfone pharmacophore provided mechanistic insight that led to the development of potent irreversible acyl- and aryl- oxymethyl ketone cruzain inhibitors. For these inhibitors, potency did not solely depend on leaving group pTa, with 2,3,5,6-tetrafluorophenoxy methyl ketone (54) identified as one of the most potent inhibitors with a second order inactivation constant of 147,000 s-1M-1. This inhibitor completely eradicated the T. cruzi parasite from mammalian cell cultures and consequently has the potential to lead to new chemo therapeutics for Chagas' disease.
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Page/Page column 49; 50-51
(2009/07/17)
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- Epothilone analogues with benzimidazole and quinoline side chains: Chemical synthesis, antiproliferative activity, and interactions with tubulin
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A series of epothilone B and D analogues bearing isomeric quinoline or functionalized benzimidazole side chains has been prepared by chemical synthesis in a highly convergent manner. All analogues have been found to interact with the tubulin/microtubule s
- Dietrich, Silvia Anthoine,Lindauer, Renate,Stierlin, Claire,Gertsch, Juerg,Matesanz, Ruth,Notararigo, Sara,Diaz, Jose Fernando,Altmann, Karl-Heinz
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supporting information; experimental part
p. 10144 - 10157
(2010/04/30)
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- From serendipity to rational antituberculosis drug discovery of mefloquine-isoxazole carboxylic acid esters
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Both in vitro and in vivo metabolism studies suggested that 5-(2,8-bis(trifluoromethyl)quinolin-4-yloxymethyl)isoxazole-3-carboxylic acid ethyl ester (compound 3) with previously reported antituberculosis activity is rapidly converted to two metabolites 3
- Mao, Jialin,Yuan, Hai,Wang, Yuehong,Wan, Baojie,Pieroni, Marco,Huang, Qingqing,Van Breemen, Richard B.,Kozikowski, Alan P.,Franzblau, Scott G.
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experimental part
p. 6966 - 6978
(2010/08/20)
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- Identification of a new class of nonpeptidic inhibitors of cruzain
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Cruzain is the major cysteine protease of Trypanosoma cruzi, which is the causative agent of Chagas disease and is a promising target for the development of new chemotherapy. With the goal of developing potent nonpeptidic inhibitors of cruzain, the substrate activity screening (SAS) method was used to screen a library of protease substrates initially designed to target the homologous human protease cathepsin S. Structure-based design was next used to further improve substrate cleavage efficiency by introducing additional binding interactions in the S3 pocket of cruzain. The optimized substrates were then converted to inhibitors by the introduction of cysteine protease mechanism-based pharmacophores. Inhibitor 38 was determined to be reversible even though it incorporated the vinyl sulfone pharmacophore that is well documented to give irreversible cruzain inhibition for peptidic inhibitors. The previously unexplored β-chloro vinyl sulfone pharmacophore provided mechanistic insight that led to the development of potent irreversible acyl- and aryl-oxymethyl ketone cruzain inhibitors. For these inhibitors, potency did not solely depend on leaving group pKa, with 2,3,5,6- tetrafluorophenoxymethyl ketone 54 identified as one of the most potent inhibitors with a second-order inactivation constant of 147,000 s-1 M-1. This inhibitor completely eradicated the T. cruzi parasite from mammalian cell cultures and consequently has the potential to lead to new chemotherapeutics for Chagas disease.
- Brak, Katrien,Doyle, Patricia S.,McKerrow, James H.,Ellman, Jonathan A.
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p. 6404 - 6410
(2008/12/22)
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- NOVEL ANTIFUNGAL AGENT COMPRISING HETEROCYCLIC COMPOUND
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The present invention provides an antifungal agent represented by the formula: [wherein A1 represents a 3-pyridyl group which may have a substituent, a quinolyl group which may have a substituent, or the like; X1 represents a group represented by the formula -NH-C(=O)-, a group represented by the formula -C(=O)-NH-, or the like; E represents a furyl group, a thienyl group, a pyrrolyl group, a phenyl group, a pyridyl group, a tetrazolyl group, a thiazolyl group or a pyrazolyl group; with the proviso that A1 may have 1 to 3 substituents, and E has one or two substituents].
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Page/Page column 75-76
(2010/11/08)
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- Substituted 2,3-dihydro-1h-isoindol-1-one derivatives and methods of use
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Selected compounds are effective for prophylaxis and treatment of diseases, such as angiogenesis mediated diseases. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable salts thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving, cancer and the like. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.
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Page/Page column 27
(2010/02/11)
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- Antagonists of melanin concentrating hormone effects on the melanin concentrating hormone receptor
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The present invention is directed to compounds of formula (I), which antagonize of the effects of melanin-concentrating hormone (MCH) through the melanin concentrating hormone receptor which is useful for the prevention or treatment of eating disorders, weight gain, obesity, abnormalities in reproduction and sexual behavior, thyroid hormone secretion, diuresis and water/electrolyte homeostasis, sensory processing, memory, sleeping, arousal, anxiety, depression, seizures, neurodegeneration and psychiatric disorders.
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Page/Page column 23
(2010/02/14)
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- AZOLIDINONE-VINYL FUSED-BENZENE DERIVATIVES
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The present invention is related to azolidinedione-vinyl fused-benzene derivatives of formula (I) for the treatment and/or prophylaxis of autoimmune disorders and/or inflammatory diseases, cardiovascular diseases, neurodegenerative diseases, bacterial or viral infections, kidney diseases, platelet aggregation, cancer, graft rejection or lung injuries. Formula (I), wherein A, X, Y, Z, R1 , R2 and n are as described in the description.
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- A new family of quinoline and quinoxaline analogues of combretastatins
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The 3-hydroxy-4-methoxyphenyl ring of combretastatin A-4 can be replaced by a 2-naphthyl moiety without significant loss of cytotoxicity and inhibition of tubulin polymerization potency. In this paper we show that the 6- or 7-quinolyl systems can in turn replace both cyclic moieties, keeping in the first case most of the potency as cytotoxic agent and in the second case as inhibitor of tubulin polymerization, related to the activities displayed by model compounds.
- Perez-Melero, Concepcion,Maya, Ana B.S.,Del Rey, Benedicto,Pelaez, Rafael,Caballero, Esther,Medarde, Manuel
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p. 3771 - 3774
(2007/10/03)
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- CARBAMIC ACID COMPOUNDS COMPRISING A BICYCLIC HETEROARYL GROUP AS HDAC INHIBITORS
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This invention pertains to certain carbamic acid compounds of the following formula, which inhibit HDAC (histone deacetylase) activity wherein: A is independently an unsubstituted or substituted bicyclic C9-10heteroaryl group (e.g., quinolinyl; quinoxalinyl; benzoxazolyl; benzothiazolyl); Q is an acid leader group, and is independently an unsubstituted or substituted, saturated or unsaturated C1 7alkylene group having a backbone length of 4 or less; with the proviso that if A is unsubstituted benzothiazol-2-yl, then Q is an unsaturated group; and with the proviso that if A is unsubstituted quinolin-6-yl, then Q is unsubstituted at the α-position; and with the proviso that A is not benzimidazol-2-yl; and pharmaceutically acceptable salts, solvates, amides, esters, ethers, chemically protected forms, and prodrugs thereof. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both invitro and in vivo, to inhibit HDAC, and in the treatment of conditions mediated by HDAC, cancer, proliferative conditions, psoriasis, etc.
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- N-phenpropylcuclopentyl-substituted glutaramide derivatives as inhibitors of neutral endopeptidase
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The invention relates to compounds of formula (I) for treating for example sexual dysfunction, wherein R1 is optionally substituted C1-6alkyl, optionally substituted carbocyclyl, optionally substituted heterocyclyl, hydrogen, C1-6alkoxy, —NR2 R3 or —NR4SO2R5; X is the linkage —(CH2)n— or —(CH2)q—O— (wherein Y is attached to the oxygen); wherein one or more hydrogen atoms in linkage X may be replaced independently by C1-4alkoxy; hydroxy; hydroxy(C1-3alkyl); C3-7cycloalkyl; carbocyclyl; heterocyclyl; or by C1-4alkyl optionally substituted by one or more fluoro or phenyl groups; n is 3, 4, 5, 6 or 7; and q is 2, 3, 4, 5 or 6; and Y is phenyl or pyridyl, each of which may be substituted; or two R8 groups on adjacent carbon atoms together with the interconnecting carbon atoms may form a fused optionally substituted 5- or 6-membered carbocyclic or heterocyclyic ring.
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- Enantioselective reduction of heteroaromatic β,γ-unsaturated ketones as an alternative to allylboration of aldehydes. Application: Asymmetric synthesis of SIB-1508Y
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Enantioselective reduction of heteroaromatic β,γ-unsaturated ketones was found to be an efficient and convenient alternative to the allylboration of corresponding aldehydes. This new method was used for the formal asymmetric synthesis of SIB-1508Y 2.
- Felpin, Fran?ois-Xavier,Bertrand, Marie-Jo,Lebreton, Jacques
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p. 7381 - 7389
(2007/10/03)
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- Compounds with analgesic effect
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PCT No. PCT/SE96/01635 Sec. 371 Date Apr. 24, 1997 Sec. 102(e) Date Apr. 24, 1997 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/23466 PCT Pub. Date Jul. 3, 1997Compounds of the formula (I) as well as their pharmaceutically acceptable salts, and pharmaceutical compositions comprising the novel compounds. The novel compounds of the formula (I) are useful in the management of pain.
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- New diarylmethylpiperazines as potent and selective nonpeptidic δ opioid receptor agonists with increased in vitro metabolic stability
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Nonpeptide δ opioid agonists are analgesics with a potentially improved side-effect and abuse liability profile, compared to classical opioids. Andrews analysis of the NIH nonpeptide lead SNC-80 suggested the removal of substituents not predicted to contribute to binding. This approach led to a simplified lead, N,N-diethyl-4-[phenyl(1-piperazinyl)methyl]benzamide (1), which retained potent binding affinity and selectivity to the human δ receptor (IC50 = 11 nM, μ/δ = 740, κ/δ > 900) and potency as a full agonist (EC50 = 36 nM) but had a markedly reduced molecular weight, only one chiral center, and increased in vitro metabolic stability. From this lead, the key pharmacophore groups for δ receptor affinity and activation were more clearly defined by SAR and mutagenesis studies. Further structural modifications on the basis of 1 confirmed the importance of the N,N-diethylbenzamide group and the piperazine lower basic nitrogen for δ binding, in agreement with mutagenesis data. A number of piperazine N-alkyl substituents were tolerated. In contrast, modifications of the phenyl group led to the discovery of a series of diarylmethylpiperazines exemplified by N,N-diethyl-4-[1-piperazinyl(8-quinolinyl)-methyl]benzamide (56) which had an improved in vitro binding profile (IC50 = 0.5 nM, μ/δ = 1239, EC50 = 3.6 nM) and increased in vitro metabolic stability compared to SNC-80.
- Plobeck,Delorme,Wei,Yang,Zhou,Schwarz,Gawell,Gagnon,Pelcman,Schmidt,Yue,Walpole,Brown,Zhou,Labare,Payza,St-Ogne,Kamassah,Morin,Projean,Ducharme,Roberts
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p. 3878 - 3894
(2007/10/03)
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- (1H-azol-1-ylmethyl)substituted quinoline derivatives
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(1H-azol-1-ylmethyl)substituted quinoline derivatives, compositions containing the same, and methods of treating mammals suffering from disorders which are characterized by an increase proliferation and/or abnormal differentation of epithelial tissues.
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- Synthesis of Oxaziridinylquinones and Oxaziridinylazines as Potential Antitumor Agents
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1,4-Benzoquinones, 1,4-naphthoquinones, as well as pyridines and quinolines having 2-alkyloxaziridinyl substituents were synthesized.The method involves formation of aldimines and their oxidation to oxaziridines. 1,4-Dimethoxyarenes bearing oxaziridinyl substituents were converted into the corresponding quinones with silver(II) dipicolinate.Some of the oxaziridinylquinones and -azines exhibit activity against KB cells, and the structure-activity relationship is discussed in terms of the current theory of biologically activated alkylating agents.
- Mlochowski, Jacek,Kubicz, Elzbieta,Kloc, Krystian,Mordarski, Marian,Peczynska, Wanda,Syper, Ludwik
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p. 455 - 464
(2007/10/02)
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- ALKALOIDS OF Nitraria komarovii. VII. STRUCTURE AND SYNTHESIS OF KOMAROVININE
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The new alkaloid komarovinine has been isolated from the total ether-extracted alkaloids of the epigeal part of Nitraria komarovii.It has also been found among the products of the dehydrogenation of nitrarine by selenium and sulfur.On the basis of the available facts, the structure of one of the isomers of 1-quinolinyl-β-carboline was proposed for komarovinine.A direct comparison with synthetic samples shows the identity of the alkaloid to 1-(quinolin-6'-yl)-β-carboline. 1-(Quinolin-7'-yl)-β-carboline, not previously described in the literature, has been characterized.
- Tulyaganov, T. S.,Ibragimov, A. A.,Yunusov, S. Yu.
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p. 604 - 605
(2007/10/02)
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