Studies on Benzochromones. IV. The Mechanism of Novel Cyclization of 1, 3, 4-Triacetoxy-2-acetylnaphthalene to 2-Methyl-3-acetyl-5-hydroxy-6-acetoxy-7, 8-benzochromone.

Abstract

The mechanism of novel cyclization of 1, 3, 4-triacetoxy-2-acetylnaphthalene (I) to 2-methyl-3-acetyl-5-hydroxy-6-acetoxy-7, 8-benzochromone (II) was investigated by the ¹⁴Ctracer method and it was found that about 70∼80% of the reaction followed the route of (I)→(I')→(II).