Synthesis of optically active .beta.-lactams by the photolytic reaction of imines with optically active chromium carbene complexes. 2. Synthesis of 1-carbacephalothin and 3-ANA relays
摘要:
A relay (3) to optically active 1-carbacephalothin (4) was prepared in modest yield with high stereoselectivity by the photochemical reaction of optically active chromium carbene complex 1 with functionalized imine 2. In contrast, the photochemical reaction of carbene complex 1 with imine precursors 15a,b to the nocardicins was much less stereoselective.
Synthesis of optically active .beta.-lactams by the photolytic reaction of imines with optically active chromium carbene complexes. 2. Synthesis of 1-carbacephalothin and 3-ANA relays
作者:Y. Narukawa、K. N. Juneau、D. Snustad、D. B. Miller、L. S. Hegedus
DOI:10.1021/jo00046a030
日期:1992.9
A relay (3) to optically active 1-carbacephalothin (4) was prepared in modest yield with high stereoselectivity by the photochemical reaction of optically active chromium carbene complex 1 with functionalized imine 2. In contrast, the photochemical reaction of carbene complex 1 with imine precursors 15a,b to the nocardicins was much less stereoselective.
Base-promoted ring-opening and elimination of 4-chloro- and 4-(methylthio)azetidinones