VO(OR)Cl2-induced cyclization of diketene via ring opening
摘要:
Diketene undergoes a VO(OR)Cl2-induced cyclization with styrenes via ring opening to give 3-alkoxycarbonyl-2-methyl-5-phenyl-4,5-dihydrofurans. Desilylative aromatization to the furans is observed in the reaction with alpha-trimethylsilylstyrene.