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Communication | Regular issue | Vol 12, No. 7, 1979, pp.921-924
Published online, 1st January, 1970
DOI: 10.3987/R-1979-07-0921
The Synthesis of Benzolactones by Palladium Catalyzed Carbonylation

Miwako Mori, Katsumi Chiba, Nobuo Inotsume, and Yoshio Ban*

*Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12 Nishi 6, Kita-ku, Sapporo, Hokkaido 060-0812, Japan

Abstract

Phthalide was easily prepared from o-bromobenzyl alcohol in the presence of a catalytic amount of Pd(OAC)2 and PPh3 under an atmospheric pressure of carbon monoxide in a good yield. When a large amount of PPh3 was used as a ligand, a better result was obtained. The six- and seven-membered benzolactones were synthesized by the same procedure.