- Cobalt-Catalyzed C-H Iodination of Aromatic Amides with Molecular Iodine through the Use of a 2-Aminophenyloxazoline-Based Bidentate-Chelation System
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The cobalt-catalyzed chelation-assisted C-H iodination of aromatic amides using molecular iodine as an iodinating reagent is reported. The reaction is carried out in an atmosphere of air and uses Co(OAc)2·4H2O as an efficient catalys
- Kommagalla, Yadagiri,Chatani, Naoto
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- Cobalt-Catalyzed C(sp2)?H Methylation by using Dicumyl Peroxide as both the Methylating Reagent and Hydrogen Acceptor
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The first cobalt-catalyzed direct methylation of a C(sp2)?H bond using dicumyl peroxide (DCP) as both the methylating reagent and hydrogen acceptor has been established. The reaction proceeded without the use of any additives, and was proven to be applicable to various amides bearing a 2-pyridinylisopropyl (PIP) directing group, providing an efficient access to o-methyl aryl amides with high functional-group tolerance. Preliminary mechanistic studies suggest a radical process would be involved in the catalytic process.
- Li, Qun,Li, Yanrong,Hu, Weipeng,Hu, Renjian,Li, Guigen,Lu, Hongjian
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- N-Heterocyclic Carbene Catalyzed Photoenolization/Diels–Alder Reaction of Acid Fluorides
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The combination of light activation and N-heterocyclic carbene (NHC) organocatalysis has enabled the use of acid fluorides as substrates in a UVA-light-mediated photochemical transformation previously observed only with aromatic aldehydes and ketones. Stoichiometric studies and TD-DFT calculations support a mechanism involving the photoactivation of an ortho-toluoyl azolium intermediate, which exhibits “ketone-like” photochemical reactivity under UVA irradiation. Using this photo-NHC catalysis approach, a novel photoenolization/Diels–Alder (PEDA) process was developed that leads to diverse isochroman-1-one derivatives.
- Agrawal, Arush,G?tze, Jan P.,Golz, Paul,Hopkinson, Matthew N.,Mavroskoufis, Andreas,Rajes, Keerthana,Ru?, Vincent
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supporting information
p. 3190 - 3194
(2020/01/24)
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- An Improved, Scalable and Impurity-Free Process for Lixivaptan
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An optimized synthetic method in high efficiency has been developed for the synthesis of lixivaptan from 2-nitrobenzyl bromide and pyrrole-2-carboxaldehyde. The byproducts among this procedure and an unknown impurity in crude product were investigated. The byproducts were speculated by 1H NMR or MS. The unknown impurity was characterized by 1H NMR, 13C NMR, and HRMS, confirming the structures as N-[3-chloro-4-(5H-pyrrolo[2,1-c][1,4]benzodiazepine-10(11H)-ylcarbonyl)phenyl]-N-(5-fluoro-2-methylbenzoyl)-5-fluoro-2-methylbenzamide. Afterwards, the impurity was synthesized to make comparisons. The target product lixivaptan was obtained with 47.6% overall yield and 99.93% purity. This cost-effective and environmentally friendly process is suitable for scale-up production.
- Mu, Shuai,Niu, Duan,Liu, Ying,Zhang, Dashuai,Liu, Dengke,Liu, Changxiao
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p. 1608 - 1613
(2015/11/09)
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- IMIDAZOTRIAZINONE COMPOUNDS
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The present invention provides imidazotriazinone compounds which are inhibitors of phosphodiesterase 9 and pharmaceutically acceptable salt thereof. The present invention further provides processes, pharmaceutical compositions, pharmaceutical preparations and pharmaceutical use of the compounds in the treatment of PDE9 associated diseases or disorders in mammals, including humans.
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Paragraph 0583; 0584; 0585
(2013/10/08)
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- Synthesis of a novel pyrrolo[1,2-c][1.3]benzodiazepine analogue of VPA-985
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The seven-step synthesis of a novel structural isomer of VPA-985, N-[3-chloro-4-(5H-pyrrolo[1,2-c][1.3]benzodiazepin-6(11H)-ylcarbonyl)phenyl] -5-fluoro-2-methylbenzamide, is described. (2-Aminophenyl)(1H-pyrrol-2-yl) methanone was converted with thiophosgene into (2-isothiocyanatophenyl)(1H- pyrrol-2-yl)methanone which was cyclised in the presence of base to 5-thioxo-5,6-dihydro-11H-pyrrolo[1,2-c][1.3]benzodiazepin-11-one. The latter underwent desulfurisation with Raney nickel followed by reduction with lithium aluminium hydride in the presence of aluminium trichloride and the resulting 6,11-dihydro-5H-pyrrolo[1,2-c][1.3]-benzodiazepine acylated with 2-chloro-4-nitrobenzoyl chloride to afford 6-(2-chloro-4-nitrobenzoyl)-6,11- dihydro-5H-pyrrolo[1,2-c][1.3]benzodiazepine. The nitro group in the latter compound was reduced with zinc and ammonium chloride to give the corresponding aniline derivative which was then acylated with 2-methyl-5-fluorobenzoyl chloride to provide the final product.
- Rotas, Georgios,Kimbaris, Athanasios,Varvounis, George
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experimental part
p. 7805 - 7810
(2011/10/12)
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- NOVEL COMPOUNDS AS CANNABINOID RECEPTOR LIGANDS AND USES THEREOF
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The present invention relates to compounds of formula (I), or pharmaceutical salts, prodrugs, salts of prodrugs, or combinations thereof, formula (I). wherein R1, R2, R3, R4, and L1 are defined in the specfication, compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions. The present invention also relates to compounds of formula (II), or pharmaceutical salts, prodrugs, salts of prodrugs, or combinations thereof, formula (II). wherein R1a, R2a, Rx, and n are as defined in the specification, compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions.
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Page/Page column 54
(2009/06/27)
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- NOVEL COMPOUNDS AS CANNABINOID RECEPTOR LIGANDS AND USES THEREOF
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The present invention relates to compounds of formula (I), or pharmaceutical salts, prodrugs, salts of prodrugs, or combinations thereof, wherein R1, R2, R3, and L1 are defined in the specfication, compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions. The present invention also relates to compounds of formula (II), or pharmaceutical salts, prodrugs, salts of prodrugs, or combinations thereof, wherein R1a, R2a and (Rx)n are as defined in the specification, compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions.
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Page/Page column 17
(2008/06/13)
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- TRICYCLIC VASOPRESSIN AGONISTS
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The present invention provides compounds of general formula (I): wherein W is O or NH, optionally substituted, as well as methods and pharmaceutical compositions utilising these compounds for the treatment of disorder which may be remedied or alleviated by vasopressin agonist activity, including diabetes insipidus, nocturnal enuresis, nocturia, urinary incontinence, bleeding and coagulation disorders, or temporary delay of urination.
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- TRICYCLIC PYRIDINE N-OXIDES VASOPRESSIN AGONISTS
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The present invention provides compounds of general formula (I) as well as methods and pharmaceutical compositions utilizing these compounds for the inducement of temporary delay of urination or the treatment of disorders which may be remedied or alleviated by vasopressin agonist activity, including diabetes, insipidus, nocturnal enuresis, nocturia, urinary incontinence, bleeding and coagulation disorders.
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- Tricyclic pyrido vasopressin agonists
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The present invention provides compounds of the general formula: wherein W is O or NH, optionally substituted, as well as methods and pharmaceutical compositions utilizing these compounds for the treatment of disorder which may be remedied or alleviated by vasopressin agonist activity, including diabetes insipidus, nocturnal enuresis, nocturia, urinary incontinence, bleeding and coagulation disorders, or temporary delay of urination.
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- Tricyclic pyridine N-oxides vasopressin agonists
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The present invention provides compounds of the general formula: as well as methods and pharmaceutical compositions utilizing these compounds for the inducement of temporary delay of urination or the treatment of disorders which may be remedied or alleviated by vasopressin agonist activity, including diabetes insipidus, nocturnal enuresis, nocturia, urinary incontinence, bleeding and coagulation disorders.
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- Tricyclic vasopressin agonists
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The present invention provides compounds of the general formula: wherein W is O or NH, optionally substituted, as well as methods and pharmaceutical compositions utilizing these compounds for the treatment of disorder which may be remedied or alleviated by vasopressin agonist activity, including diabetes insipidus, nocturnal enuresis, nocturia, urinary incontinence, bleeding and coagulation disorders, or temporary delay of urination.
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