THE CONDENSATION OF PHOSPHONOTHIOIC AND PHOSPHONIC DICHLORIDES WITH <i>o</i>-DIAMINES
作者:Ralph L. Dannley、Arturs Grava
DOI:10.1139/v65-469
日期:1965.12.1
dichlorides, and phenylenediamines containing electron-donating substituents are more reactive than those containing electron-withdrawing substituents. The diazaphosphole 2-oxides undergo hydrolysis or alcoholysis of only one of the amide groups under mild conditions. The 2-sulfides are much more resistant to hydrolysis than the 2-oxides. The 2-sulfides are converted to the N-methyl derivatives by dimethyl
4H-1-benzopyran-4-one derivative or its salt, process for producing the
申请人:Toyama Chemical Company, Ltd.
公开号:US04954518A1
公开(公告)日:1990-09-04
This invention relates to a 4H-1-benzopyran-4-one derivative represented by the formula: ##STR1## or a salt thereof, a process for producing the same and a pharmaceutical composition comprising the same as active ingredient.