Regioselective Synthesis of Medium-Sized Bicyclic Butenolides by Lewis Acid Catalyzed Cyclization of Cyclic 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Oxalyl Chloride
摘要:
[GRAPHICS]A new strategy for the synthesis of medium-sized bicyclic gamma-alkylidenebutenolides is reported which involves Me3SiOTf-catalyzed cyclization of cyclic 1,3-bis(trimethylsilyloxy)-1,3-butadienes with oxalyl chloride.