Ring transformations of aziridinyl 2-phosphonates: synthesis of 5-phosphono-2-oxazolidinones and 5-phosphono-2-imidazolidinones
摘要:
Syntheses of 5-phosphono-2-oxazolidinones and 5-phosphono-2-imidazolidinones were achieved from the corresponding 1-vinyl-2-phosphonoaziridines. Regioselective aziridine ring opening employing methyl chloroformate affords 1-amido-2-chloroethyl-phosphonates, which were easily transformed into the corresponding 2-oxazolidinones upon heating in dimethyl sulfoxide. Treatment of the aziridine ring opening products with ammonia furnishes vinylphosphonates, which undergo a Michael type addition with several amines. In situ ring closure of the addition products yields the corresponding phosphonylated 2-imidazolidinones. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis of 1-phosphono-2-aza-1, 3-dienes and their conversion into 1-vinyl-2-phosphonoaziridines
作者:Christian Stevens、Marc Gallant、Norbert De Kimpe
DOI:10.1016/s0040-4039(99)00422-0
日期:1999.4
1-Phosphono-2-aza-1,3-dienes were formed by 1,4-dehydrochlorination of the corresponding N-(phosphonomethyl)-alpha-chloroimines, and reacted smoothly with diazomethane to give 1-vinyl-2-phosphonoaziridines. (C) 1999 Elsevier Science Ltd. All rights reserved.