Thione<i>S</i>-Imides. The Reaction with Carbon-Hetero Atom Double Bond
作者:Takao Saito、Isao Oikawa、Shinichi Motoki
DOI:10.1246/bcsj.53.1023
日期:1980.4
9-Fluorenethione S-p-toluenesulfonimide reacted as a 1,3-dipole with imines, oximes, and thiones to form (3+2)cycloadducts, while with symmetrical azines and aldehydes, unsymmetrical azines, N-(p-tolylsulfonyl) imines and fluorenone were obtained as a result of the decomposition of the cycloadducts.
monomethyl ester of the respective dicarboxylicacid was involved in a reaction with imines promoted by acetic anhydride at an elevated temperature. Instead of the initially expected δ-lactam products of the Castagnoli-Cushman-type reaction, medicinally important 3-amino-2-azetidinones were obtained as the result of cyclization, involving a methylene group adjacent to an acid moiety. In contrast, replacing