Acid cleavage of 6-methoxy-2-(2,4,6-trimethoxybenzoyl)coumaran-3-one
Abstract
Under acidic conditions 6-methoxy-2-(2,4,6-trimethoxybenzoyl)coumaran-3-one did not demethylate to give the expected 6-methoxy-2-(2-hydroxy-4,6-dimethoxybenzoyl)coumaran-3-one, but cleaved to give 1,3,5-trimethoxybenzene and 6-methoxycoumaranone.