Studies on the Syntheses of Isoquinoline Derivatives. III

On the Ring Formation of α-Piperonyl-α′-piperonalacetoxime to Isoquinoline Derivatives

Abstract

By the cyclization of α-piperonyl-α′-piperonalacetoxime with POCl₃, 6, 7-methylenedioxy-1-(3′, 4′-methylenedioxystyryl)-3, 4-dihydro-isoquinoline was obtained.