ZnI2‐Catalyzed Benzannulation of o‐Alkynylbenzaldehydes with Alkenes Leading to 1‐Acyl‐2‐Substituted Naphthalenes
A new, practical route to 1-acyl-2-substituted naphthalenes has been developed by benzoquinone-promoted ZnI 2 -catalyzed benzannulation of 2-alkynylbenzaldehydes with alkenes. This method allows three new bonds, two C=C bonds and one C=O bond, to be constructed in a single reaction.