A convenient synthesis of methylenomycin B. Further mechanistic studies on the SET catalyzed electrocyclization of enynones.
摘要:
Methylenomycin B (3a) has been prepared in approximately 55% yield by SET catalyzed cyclization of enynone 1a. Mechanistic studies indicate that initial electron donation takes place at C-3 in enolized intermediates of type 2a.