Cu(<scp>ii</scp>)-Catalyzed formal [4 + 2] cycloaddition between quinone methides (QMs) and electron-poor 3-vinylindoles

Abstract

A new Cu(<sc>ii</sc>)-catalyzed formal [4 + 2] cycloaddition between quinone methides (QMs) including <italic>para</italic>-quinone methides (<italic>p</italic>-QMs) and <italic>ortho</italic>-quinone methides (<italic>o</italic>-QMs) and electron-poor 3-vinylindoles was established.