Ssp. Chou et Yj. Yu, INTRAMOLECULAR DIELS-ALDER REACTIONS OF THIO-SUBSTITUTED DIENES WITH ENONES, Journal of the Chinese Chemical Society, 44(4), 1997, pp. 373-378
Thio-substituted dienes bearing an enone moiety were readily prepared
from 3-sulfolenes, and their intramolecular Diels-Alder (IMDA) reactio
ns were studied. Octahydronaphthalenones were produced in good yield w
ith high stereoselectivity. Hexahydroindenones were also obtained, but
the stereoselectivity was lower.