The synthesis of 4-(4-([11C]methoxyphenyl) -(5-fluoro-2-hydro-xyphenyl)-methylene-aminobutyric acid, as a potential radioli-gand for the gaba receptor in the brain
The synthesis of 4-(4-([11C]methoxyphenyl) -(5-fluoro-2-hydro-xyphenyl)-methylene-aminobutyric acid, as a potential radioli-gand for the gaba receptor in the brain
Transition‐Metal‐Free DMAP‐Mediated Aromatic Esterification of Amides with Organoboronic Acids
作者:Tao Wang、Yanqing Wang、Kai Xu、Yuheng Zhang、Jiarui Guo、Lantao Liu
DOI:10.1002/ejoc.202100478
日期:2021.6.14
A new, transition-metal-free, effective method for aromatic esterification of amides with organoboronic acids has been developed, leading to a wide range of benzoate derivatives with yields ranging from moderate to good. The catalytic reaction shows broad substrate scope and excellent functional group tolerance.
Herein, the first decarboxylative hydroxylation reaction to synthesize phenols from benzoic acids is reported. The method overcomes the challenges associated with conventional decarboxylation of benzoic acids and can be applied even for the late-stage functionalization.
A simple procedure affording benzoates through a NHC‐catalyzed aerobicoxidativeesterification of aldehydes with organoboronic acids has been disclosed. This process allows access to a wide variety of aromatic esters in good to excellent yields under simple, efficient, and sustainable reaction conditions (see scheme).
K<sub>2</sub>CO<sub>3</sub>-promoted formation of aryl esters from primary aryl amides by the acyl–acyl exchange process
作者:Yongjun Bian、Xingyu Qu
DOI:10.1039/c6ob00187d
日期:——
A new acyl–acyl exchange reaction has been developed for the formation of aryl esters from primary aryl amides. The reaction could occur under mild reaction conditions with catalytic quantities of K2CO3, and could afford moderate to good yields of the desired products.
已经开发了一种新的酰基-酰基交换反应,用于由伯芳基酰胺形成芳基酯。该反应可以在温和的反应条件下用催化量的K 2 CO 3进行,并且可以提供中等至良好产率的所需产物。
Quaternary ammonium compounds
申请人:Asahi Kasei Pharma Corporation
公开号:US07312208B2
公开(公告)日:2007-12-25
Drugs useful for the treatment and prevention of hyperlipidemia, moreover drugs useful for the treatment and prevention of cholestasis-caused hepatopathy, particularly primary biliary cirrhosis and primary sclerosing cholangitis, and drugs for the treatment and prevention of obesity, fatty liver and steatohepatitis, containing as active ingredients benzothiazepine compounds having a thioamide bond and a quaternary ammonium substituent, represented by formula (1) below are provided.
Also, drugs containing ileal bile acid transporter inhibiting compounds as active ingredients for the treatment and prevention of cholestasis-caused hepatopathy are provided.