The Esterification of Thujopsene with Bismuth(III) Sulfate in Carboxylic Acids

The catalytic interaction of cis-(−) -thujopsene with a series of organic acids from acetic to octanoic in the presence of bismuth(III) sulfate afforded the corresponding esters in 20–34% yields, accompanied by skeletal rearrangement. The follow-up of the reaction, an investigation of the reaction conditions, and the effects of catalysts are described.