Studies on Benzochromones. III. The Mechanism of Novel Cyclization of 1-Methoxy-2-acetyl-3, 4-diacetoxynaphthalene to 2-Methyl-5, 6-dihydroxy-7, 8-benzochromone.
The mechanism of novel cyclization of 1-Methoxy-2-acetyl-1, 3-diacetoxynaphthalene (IV) to 2-methyl-5, 6-dihydroxy-7, 8-benzochromone (V) was investigated with 14C-tracer method and it was found that about 90% of the reaction followed the route of (IV)→(IV')→(V).
