Synthesis of [2,3-b]thieno- and furoquinoxalines by the SNH and SNipso reactions of 2-substituted quinoxalines with acetophenones
摘要:
The treatment of quinoxalin-2-one with acetophenones in the presence of boron trifluoride gives 3-(2-hydroxy-2-R-vinyl)quinoxalin-2-ones, which can be transformed into [2,3-b]thienoquinoxalines by reactions with P2S5.