- Radical-mediated divergent cyclization of benzamides toward perfluorinated or cyanated isoquinolinediones
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A simple and efficient copper-controlled divergent cyclization of benzamides, which leads to perfluorinated or cyanated isoquinolinediones, is developed. In the presence of AIBN, methacryloyl benzamides with perfluoroalkyl iodides undergo cascade radical addition/cyclization to afford perfluoroinated isoquinolinediones as the major product under metal-free conditions, whereas the use of CuI (10 mol%) is able to redirect the cyclization to yield isoquinolinediones bearing an α-cyano quaternary carbon center. The cyclization features controllable divergent synthesis and a broad substrate scope as well as highly practical reaction conditions, thereby making this strategy a highly attractive means to fluorinate or cyanate isoquinolinediones.
- Deng, You-Lin,Tang, Shi,Ding, Guo-Liang,Wang, Ming-Wei,Li, Jie,Li, Zeng-Zeng,Yuan, Li,Sheng, Rui-Long
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supporting information
p. 9348 - 9353
(2016/10/13)
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- Supported cobalt oxide nanoparticles as efficient catalyst in esterification and amidation reactions
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Co/SBA-15 nanoparticle catalysts (CoNP) were prepared using a commonly adapted synthetic route and then utilised for esterification and amidation reactions using aromatic and linear chain compounds for the production of long chain esters and amides. The study shows that the use of CoNP catalysts favours the use of aromatic reactants with electron donating substituents specifically in the para position. For the amidation reaction, good to excellent yields were obtained demonstrating tolerance towards differently substituted aromatic compounds. Overall, the synthesized catalysts proved to be efficient and highly versatile, and recyclable under the investigated conditions.
- Rajabi, Fatemeh,Raessi, Mojdeh,Arancon, Rick A.D.,Saidi, Mohammad Reza,Luque, Rafael
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p. 122 - 126
(2015/01/09)
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- Aminocarbonylations employing Mo(CO)6 and a bridged two-vial system: Allowing the use of nitro group substituted aryl iodides and aryl bromides
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A bridged two-vial system aminocarbonylation protocol where Mo(CO) 6 functions as an external in situ solid source of CO has been developed. For the first time both nitro group containing aryl/heteroaryl iodides and bromides gave good to excellent yields in the Mo(CO) 6-mediated and palladium(0)-catalyzed conversion to benzamides, while the identical one-vessel protocol afforded extensive reduction of the nitro functionality. The above-mentioned bridged two-compartment protocol furnished good results with both primary amines and secondary amines and sluggish aniline nucleophiles at 65-85 C reaction temperatures.
- Nordeman, Patrik,Odell, Luke R.,Larhed, Mats
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p. 11393 - 11398
(2013/02/23)
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- Charge-transfer interaction between poly(9-vinylcarbazole) and 3,5-dinitrobenzamido group or 3-nitrobenzamido group
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We studied the charge-transfer (CT) interaction between poly(9-vinylcarbazole) (PVK) and 3,5-dinitrobenzamido (DBA) group or 3-nitrobenzamido (NBA) group. The complexation equilibrium constant of PVK and N-butyl-3,5dinitrobenzamide was found to be larger
- Yu, Ying,Yao, Yuan,Wang, Liyan,Li, Zesheng
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experimental part
p. 3275 - 3279
(2010/12/18)
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- 3-(2′-Bromopropionylamino)-benzamides as novel S-phase arrest agents
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We report the synthesis, antiproliferative activity, and SAR of novel 3-(2′-bromopropionylamino)-benzamides. Many of the benzamide compounds showed potent cytotoxicities against Molt-3 leukemia cells. Several compounds exihibited cytotoxicities (under 6.5
- Hu, Laixing,Li, Zhuo-rong,Li, Jian-Nong,Qu, Jinrong,Jiang, Jian-Dong,Boykin, David W.
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p. 6847 - 6852
(2008/09/16)
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- Thermosensitive recording material and novel color developer compounds
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Disclosed is a thermosensitive recording material comprising a sheet-shaped support and a thermosensitive recording layer which is formed on at least one surface of the support and comprises a colorless or light-colored dye precursor and a color developer capable of reacting with the dye precursor and inducing color formation therein upon application of heat thereto, the color developer comprising a compound represented by the following formula (I) or analog thereof:: The thermosensitive recording material has high sensitivity and can prevent white background portions from coloring and recorded images from decolorizing in an environmental resistance test.
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- Aminolysis of 2,2,2-Trichloro-1-arylethanones in Aprotic Solvents
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The kinetics of the reaction of the title substrate with various alkylamines was studied in n-heptane, dichloromethane, dioxane, tetrahydrofuran, and acetonitrile.The reaction was third-order in amine when the solvent was n-heptane or dichloromethane.In the other solvents a second-order dependence on was observed.The fourth-order rate constants for the reaction of n-butylamine with various 2,2,2-trichloro-1-arylethanones in dichloromethane yielded a ρ value of 3.0.In all solvents the observed rate constans decreased with a temperature increase.Two mechanistic possibilities were suggested, the first one in solvents of low donicity, involving a T0 intermediate formed in a concerted process with the participation of an amine dimer; and the second one, a stepwise process in more basic solvents which takes place via a T+/- intermediate.Base-catalyzed collapse of the tetrahedral intermediates is the rate-determining step in both pathways.
- Druzian, Janice,Zucco, Cesar,Rezende, Marcos Caroli,Nome, Faruk
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p. 4767 - 4771
(2007/10/02)
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- MECHANISM OF ESTER AMINOLYSIS IN APROTIC MEDIA AND SPECIFIC SOLVENT EFFECTS
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The n-butylaminolysis of nitro-substituted 4'-nitrophenyl benzoates and cinnamates as well as of phenylacetates in aprotic solvents is governed by a kinetic law implying higher order terms in nucleophile.It is shown that the attacking nucleophile forms a n-? type molecular complex with the substrate before reaching the transition state in the subsequent kinetic step.This molecular complex is a true reaction intermediate as evidenced by the observed negative activation enthalpy.Other nucleophile molecules intervene as general base catalysts.Tertiary amines also catalyse the reaction.Their catalytic activity is linearly related to their hydrogen bond forming ability and it is not a direct function of their proton basicity.By varying the nucleophile structure, an excellent Broensted relationship could be obtained for the first time in aprotic media, the β of which confirms that the catalytic collapse of tetrahedral intermediate is the rate determining step.The reaction of cinnamates turns out to be less sensitive to structural changes of the substrate than is the reaction of benzoates as shown by the corresponding Hammet ? values.The electronic effects of 2-nitro groups are strongly solvent dependent.Once more, it is established that whenever specific solvent effects (?-donor or n-donor ability) are present, they dominate the overall effect.A general reaction mechanism is proposed which not only explains the various roles played by the nucleophile but also accounts successfully for the great variety of kinetic schemes observed in aprotic media.
- Nagy, Otto B.,Reuliaux, Victor,Bertrand, Nicole,Mensbrugghe, Anne Van Der,Leseul, Jean,Nagy, Janos B.
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p. 1055 - 1074
(2007/10/02)
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- 11a-Methano-TXA compounds
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The present invention provides novel 11a-methano-TXA compounds and intermediates and processs for their preparation. Further provided are methods for using these novel TXA analogs as inhibitors of thromboxane synthetase, rendering these analogs useful for a variety of pharmacological purposes. These pharmacological uses include anti-inflammatory, anti-thromobitc, and anti-asthma indications.
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