Ts. Wang et al., Mild generation of o-quinone methides. Synthesis of (-)-hexahydrocannabinol and dihydrocannabidiol, SYN COMMUN, 30(8), 2000, pp. 1431-1435
(-)-Hexahydrocannabinol 7 was synthesized enantioselectively under mild con
ditions through the ortho quinone methide mediated cyclization of the adduc
t of R-(+)-ciuonellal and the bisethoxyethyl ether of olivetol. The conditi
ons enabled the ene product, 1,2-dihydrocannabidiol 6, to be isolated as we
ll.