2,4-Disubstituted-5-methyl oxazoles were prepared from a 2-step, 1-pot procedure using acid chlorides and propargyl amines. These conditions lead to the formation of propargyl amides in situ followed by AuCl3 catalyzed cyclization. We were interested in this novel formation of tri-substituted oxazoles and exploring the scope of the reaction using these mild conditions. A variety of aryl and aliphatic
Process for the preparation of thiazolidinedione derivatives
申请人:——
公开号:US20010049445A1
公开(公告)日:2001-12-06
The present invention is concerned with a novel process for the preparation of compounds of formula I
1
comprising bromomethylation or chloromethylation of a compound of formula II
2
and subsequent reaction with a compound of formula IV
3
The compounds of formula I and the corresponding salts, e.g. the sodium salts, are pharmaceutically active substances.
This invention provides compounds and their pharmaceutically-acceptable salts, pharmaceutical formulations of said compounds, and methods for treating hyperglycemia associated with non-insulin dependent diabetes and for treating hyperlipidemia.