Studies on Acetylenic Compounds. XXXI. Intramolecular Cyclization Reaction of the Acetylenic Compounds.

Abstract

Intramolecular condensational cyclization of the acetylenic compounds to the aromatic nucleus was achieved with polyphosphoric acid, and this reaction was accompanied with dehydrogenation to give naphthalene derivatives. This method can also be used to nitrogen containing acetylenic compounds to prepare carbostryril derivatives.