Certain pyrrolecarboxylic and pyrroleacetic acid derivatives substituted on the pyrrole ring with thioether groups, acyl groups, phenyl, substituted phenyl, phenoxy, substituted phenoxy, benzyl or halo and optionally substituted on the pyrrole nitrogen with alkyl, and the pharmaceutically acceptable salts thereof, are useful in lowering the blood glucose levels of hyperglycemic animals.
Antidiabetic furancarboxylic and thiphenecarboxylic acids
申请人:Pfizer Inc.
公开号:US04282246A1
公开(公告)日:1981-08-04
Compounds of the structure ##STR1## wherein Z is oxygen or sulfur; R is (C.sub.1 -C.sub.2)alkoxy; phenoxy; benzyl; phenylthiomethyl; phenylthio; phenylthio monosubstituted in the 2-, 3- or 4-position with (C.sub.1 -C.sub.3)alkyl, phenyl, methoxy, chloro, fluoro or trifluoromethyl; phenylthio disubstituted in the 2,5- or 3,5- positions with methyl, methoxy, chloro, or fluoro; 2,3,5,6-tetrafluorophenylthio; 1- or 2-naphthylthio; (C.sub.2 -C.sub.6)alkylthio; or halo (bromo or chloro); and the pharmaceutically-acceptable salts thereof are useful in lowering the blood glucose levels of hyperglycemic mammals.
A novel chalcogen-mediated metal-free oxyfunctionalization mode of ynamides for the synthesis of α-chalcogenyl acrylamides has been developed.
一种新颖的硒介导的无金属氧官能化模式已被开发用于合成α-硒基丙烯酰胺。
In Situ Activation of Disulfides for Multicomponent Reactions with Isocyanides and a Broad Range of Nucleophiles
作者:Xiaofang Lei、Yuanyuan Wang、Erkang Fan、Zhihua Sun
DOI:10.1021/acs.orglett.9b00275
日期:2019.3.1
Activation of disulfides with N-halogen succinimide in the presence of TEMPO allows insertion reaction by an isocyanide, the product of which can further accept a wide range of nucleophiles for the generation of isothioureas and related molecular moieties. This new procedure overcomes previous methods that accept essentially only aryl amines as the third nucleophilic component. The diverse nucleophiles