

(3+2) CYCLOADDITION OF N-BENZYLAZOMETHINE METHYLIDE WITH 4-ARYLIDENE-1H-IMIDAZOLE-5(4H)-ONES

Abstract
4-Arylidene-1H-imidazol-5(4H)-ones react with N-benzylazomethine methylide under trifluoroacetic acid catalysis to form 9-aryl-1,3,7-triazaspiro[4.4]non-1-en-4-ones in 66–95% yields as one diastereomer in each case.
Keywords
azomethine ylides; imidazole; pyrrolidine; spirocyclic compounds; (3+2) cycloaddition.
Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv