Microwave-assisted synthesis of 4-oxo-2-butenoic acids by aldol-condensation of glyoxylic acid
作者:Mélanie Uguen、Conghao Gai、Lukas J. Sprenger、Hang Liu、Andrew G. Leach、Michael J. Waring
DOI:10.1039/d1ra05539a
日期:——
4-Oxobutenoic acids are useful as biologically active species and as versatile intermediates for further derivatisation. Currently, routes to their synthesis can be problematic and lack generality. Reaction conditions for the synthesis of 4-oxo-2-butenoic acid by microwave-assisted aldol-condensation between methyl ketone derivatives and glyoxylic acid have been developed. They provide the desired
[4R]-3-(.omega.-Aroylpropionyl)-4-thiazolidinecarboxylic acids and esters
申请人:American Cyanamid Company
公开号:US04374249A1
公开(公告)日:1983-02-15
This disclosure describes novel [4R]-3-(.omega.-aroylpropionyl)-4-thiazolidinecarboxylic acids and esters and the cationic salts thereof which are useful as hypotensive agents in mammals.
Prolineracemases (PRAC), catalyzing the l-proline and d-proline interconversion, are essential factors in eukaryotic pathogens such as Trypanosoma cruzi, Trypanosoma vivax, and Clostridioides difficile. If the discovery of irreversible inhibitors of T. cruzi PRAC (TcPRAC) led to innovative therapy of the Chagas disease, no inhibitors of CdPRAC have been discovered to date. However, C. difficile, due
脯氨酸消旋酶 (PRAC) 催化l-脯氨酸和d-脯氨酸相互转化,是真核病原体如克氏锥虫、间日锥虫和艰难梭菌的重要因子。如果发现T的不可逆抑制剂。 cruzi PRAC (TcPRAC)导致了南美锥虫病的创新疗法,迄今为止尚未发现Cd PRAC 抑制剂。然而,由于近年来发病率增加,艰难梭菌被认为是威胁健康的主要原因。在这项工作中,我们考虑了Tc PRAC 和Cd之间的相似性PRAC 酶设计新的Cd PRAC 抑制剂。从( E ) 4-oxopent-2-enoic acid Tc PRAC 不可逆抑制剂开始,我们合成了4-芳基取代的类似物,并评估了它们对艰难梭菌11 株的Cd PRAC 酶抑制作用。该研究产生了有希望的候选物,并允许鉴定 ( E )-4-(3-bromothiophen-2-yl)-4-oxobut-2-enoic acid 20,该物质被选择用于补充体内研究但未在体内揭示毒性。