Studies on Quinoline and Isoquinoline Derivatives. V. Reaction of Isoquinoline 2-Oxide with Diketene

Abstract

The reaction of isoquinoline 2-oxide with diketene afforded three products whose structures were assigned as 2, 6-dimethyl-3-(1-isoquinolyl)-4-pyrone (II), 4-methyl-2-oxo-2H-benzo [α] quinolizine (III), and 1-acetonyl-4-acetoxy-2-acetyl-1, 2-dihydroisoquinoline (IV), respectively.