3-亚甲基异苯并呋喃-1(3 H )-酮及其衍生物的合成研究

Starting from 2-vinylbenzoic acid methyl ester and derivatives, 3-hydroxymethylisobenzofuran-1(3H)-one and derivatives were prepared through hydrolysis of esters, followed by epoxidation with m-chloroperoxybenzoic acid, cyclization reaction catalyzed by p-toluenesulfonic acid; then nucleophilic substitution with phosphorus tribromide or tosyl chloride and elimination reaction, 3-methyleneisobenzofuran-1(3H)-one and their derivatives were synthesized. The yield of tosyl chloride method was higher than phosphorus tribromide method in the nucleophilic substitution and elimination reaction. Ten target products and intermediates are new compounds. Their structures were characterized by 1 H NMR, 13 C NMR, MS and IR tech-