Ley Steven V., Murray P. John.
A short syntesis of (�)-hirsutene involving the use of an organoselenium-mediated cyclization reaction, Journal of the Chemical Society, Chemical Communications, 1982A short synthesis of the sesquiterpene hirsutene (1) has developed in which the key step involved intramolecular cyclization of a beta-oxoester to an alkene using N-phenylselenophthalimide and tin terrachloride.