502925-17-9Relevant academic research and scientific papers
Method for catalytically oxidizing amine to be synthesized into amide through dipyridyl-type manganese catalyst
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Paragraph 0017-0027; 0097-0099, (2019/06/30)
The invention discloses a methodfor catalytically oxidizing amine to be synthesized into amide througha dipyridyl-type manganese catalyst. According to the method, a dipyridyl manganese complex formedafter coordination of a dipyridyl-type complex and cheap metal manganese serves as the catalyst, clean and environment-friendly hydrogen peroxide serves as an oxidizing agent, oxidation of N ortho-position sp3 C-H bonds catalyzed by the cheap metal manganese is achieved, and the amine is directly oxidized to obtain the amide. Compared with existing methods, the method has the advantages that theadopted catalyst is low in price, the preparing method is simple, raw materials are easy to obtain, the use level of the catalyst is low, the substrate range is wide, the reaction condition is mild, the operation is simple and environmentally friendly, the reaction time is short, the yield is high, the selectivity is high, and the industrialization cost is low.
An efficient method for the N-formylation of amines under catalyst- and additive-free conditions
Xu, Zhuo-Wei,Xu, Wen-Yi,Pei, Xiao-Jun,Tang, Fei,Feng, Yi-Si
supporting information, p. 1254 - 1258 (2019/04/10)
A simple catalyst- and additive-free method for the N-formylation of amines has been developed. The advantages of this protocol include a wide range of functional group tolerance, high efficiency and a lack of required extra promoters under mild conditions. This convenient strategy will provide a facile synthesis towards N-formamide natural products and pharmaceutical derivatives. A mechanism that involves difluorocarbene is proposed for this reaction.
N-aryl formamide prepared by using ethyl bromodifluoroacetate as formylating reagent
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Paragraph 0034, (2018/12/02)
The invention discloses a compound of N-aryl formamide prepared by using ethyl bromodifluoroacetate as a formylating reagent. The compound is prepared by using N-alkyl arylamine as a raw material, ethyl bromodifluoroacetate as a formylating reagent and copper as a catalyst, adding different ligands, bases, etc., performing reaction under stirring in a reaction solvent at 100-120 DEG C for 10-14 hours; then filtering the reaction solution to obtain filtrate after reaction ending; concentrating the filtrate, removing the solvent by using a rotary evaporator to obtain a residue, treating the residue by silica gel column chromatography, eluting with an eluent, collecting the effluent according to the actual gradient; combining the effluent containing the product, concentrating the combined effluent to remove the solvent, and performing vacuum drying to obtain the target product. The compound has the advantages of simple and easily obtained raw materials, simple preparation process, less pollution, low energy consumption and high yield.
Copper-Catalyzed N-Formylation of Amines through Tandem Amination/Hydrolysis/Decarboxylation Reaction of Ethyl Bromodifluoroacetate
Li, Xiao-Fang,Zhang, Xing-Guo,Chen, Fan,Zhang, Xiao-Hong
, p. 12815 - 12821 (2018/10/20)
Ethyl bromodifluoroacetate (BrCF2COOEt) was first used as the N-formylating reagent in the copper-catalyzed N-formylation of amines. A range of primary, secondary, cyclic arylamines, and aliphatic amines underwent the N-formylation smoothly to furnish the N-formamides in moderate-to-excellent yields.
Visible-light-induced oxidative formylation of N-alkyl-N-(prop-2-yn-1-yl)anilines with molecular oxygen in the absence of an external photosensitizer
Ji, Wangqin,Li, Pinhua,Yang, Shuai,Wang, Lei
supporting information, p. 8482 - 8485 (2017/08/03)
Visible-light-induced oxidative formylation of N-alkyl-N-(prop-2-yn-1-yl)anilines with molecular oxygen in the absence of an external photosensitizer was developed and afforded the corresponding formamides in good yields under mild conditions. The investigation of the mechanism disclosed that both the starting material and the product act as photosensitizers, and 1O2 and O2- are generated through energy transfer and a single electron transfer pathway and play an important role in the reaction.
Photoinduced Oxidative Formylation of N,N-Dimethylanilines with Molecular Oxygen without External Photocatalyst
Yang, Shuai,Li, Pinhua,Wang, Zhihui,Wang, Lei
supporting information, p. 3386 - 3389 (2017/07/15)
A photoinduced oxidative formylation of N,N-dimethylanilines with molecular oxygen in the absence of an external photocatalyst was developed and provided the corresponding formamides in good yields under mild reaction conditions. Investigations indicated that both the starting material and product act as photosensitizers and that 1O2 coexists with O2?- during the reaction through energy transfer and single electron transfer process.
NOVEL COMPOUNDS
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Page/Page column 40, (2009/03/07)
The invention provides novel hydantoin derivatives; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy.
METHODS FOR TREATING RETINOID RESPONSIVE DISORDERS USING SELECTIVE INHIBITORS OF CYP26A AND CYP26B
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Page/Page column 176-177, (2008/06/13)
The invention provides methods for treating an individual having a retinoid responsive disorder. In one embodiment, a method involves administering to the individual an effective amount of a selective CYP26B inhibitor, the selective CYP26B inhibitor having at least 10-fold selectivity for CYP26B relative to CYP26A. In another embodiment, a method involves administering to the individual an effective amount of a selective CYP26A inhibitor, the selective CYP26A inhibitor having a chemical formula set forth in the specification. The invention further provides screening methods for identifying a selective CYP26A inhibitor or selective CYP26B inhibitor.
COMPOUNDS HAVING SELECTIVE CYTOCHROME P450RAI-1 OR SELECTIVE CYTOCHROME P450RAI-2 INHIBITORY ACTIVITY AND METHODS OF OBTAINING THE SAME
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Page/Page column 138, (2010/02/12)
Compounds of formulas 1 through 17 provided in the specification specifically or selectively inhibit either the cytochrome P450RAI-1 enzyme or the cytochrome P450RAI-2 enzyme.
