Synthesis of isoxazolo[4,5-e][1,4]diazepin-5-ones from 5-acyl-4-(haloacetylamino)isoxazoles
摘要:
Treatment of 5-benzoyl-4-(iodoacetylamino)isoxazoles with alcoholic ammonia leads to isoxazolo[4,5-e][1,4]diazepin-5-ones, whereas the analogous chloroacetylamino derivatives are converted into a mixture of the deacylated 4-aminoisoxazoles and isoxazolo[4,5-d]pyrimidines.
Competitive formation of 4-aminoisoxazoles and 5-aminooxazoles in the cyclization reactions of O-alkylated hydroxyimino nitriles
作者:V. P. Kislyi、E. B. Danilova、V. V. Semenov、A. A. Yakovenko、F. M. Dolgushin
DOI:10.1007/s11172-006-0495-5
日期:2006.10
Base-catalyzed cyclization of O-alkylated α-hydroxyimino nitriles gave mixtures of 4-aminoisoxazoles and 5-aminooxazoles, their ratio depending on the substituent structures and the reaction conditions. The formation mechanism of 5-aminooxazoles in this reaction is discussed.