A simple and palladium-catalyzed procedure for synthesis of a novel series of potentially biologically active trifluoromethyl-substituted quinazolinones and N-arylquinazoline derivatives via condensation-cyclization reaction of 2-aminobenzamide, 2-amino-N′-arylbenzimidamides and 2-amino-N′-benzylbenzimidamides with trifluoroacetimidoyl chlorides has been developed. noteworthy, this investigation showed
A simple and efficient method for the synthesis of 2‐trifluoromethyl quinolines by means of visible‐light‐induced radicalcyclization of trifluoroacetimidoylchlorides with alkynes has been developed. This protocol allows the generation of imidoyl radicals by activation of C(sp2)Cl bonds using a photoredox catalyst under mild and environmentally friendly conditions (see scheme).
Telescoped, Divergent, Chemoselective C1 and C1‐C1 Homologation of Imine Surrogates: Access to Quaternary Chloro‐ and Halomethyl‐Trifluoromethyl Aziridines
作者:Laura Ielo、Saad Touqeer、Alexander Roller、Thierry Langer、Wolfgang Holzer、Vittorio Pace
DOI:10.1002/anie.201812525
日期:2019.2.18
A conceptually novel, high‐yielding, mono‐ or bis‐homologation was realized with lithium halocarbenoids and enables the one‐step, fully chemocontrolled assembly of a new class of quaternary trifluoromethyl aziridines. Trifluoroacetimidoyl chlorides (TFAICs) act as convenient electrophilic platforms, enabling the addition of either one or two homologating elements by simply controlling the stoichiometry
Base-mediated [3+2] annulation of trifluoroacetimidoyl chlorides and isocyanides: An improved approach for regioselective synthesis of 5-trifluoromethyl-imidazoles
作者:Sipei Hu、Hefei Yang、Zhengkai Chen、Xiao-Feng Wu
DOI:10.1016/j.tet.2020.131168
日期:2020.5
A t-BuOK-mediated [3 + 2] cycloaddition reaction of trifluoroacetimidoyl chlorides and active methylene isocyanides for the synthesis of 5-trifluoromethyl-imidazoles has been developed. Under mild reaction conditions, the transformation proceeds smoothly in the presence of t-BuOK to afford an array of structurally diverse 5-trifluoromethyl-imidazoles with high efficiency.
A metal-free oxidative cyclization of readily available trifluoroacetimidohydrazides with D-glucose for the assembly of 3-trifluoromethyl-1,2,4-triazoles has been disclosed. D-glucose is applied as C1 synthon to provide methine source in the reaction. Control experiments have been conducted to shed light on the reaction mechanism. The synthetic utility of the protocol has been explored by the implementation
已经公开了易于获得的三氟乙酰氨基酰肼与 D-葡萄糖的无金属氧化环化,用于组装 3-三氟甲基-1,2,4-三唑。D-葡萄糖用作 C1 合成子以在反应中提供次甲基源。已经进行了对照实验以阐明反应机理。该协议的合成效用已通过扩大反应的实施和 NK I受体配体的关键骨架的合成进行了探索。