Yn. Yamakoshi et al., HIGH-PRESSURE MEDIATED ASYMMETRIC DIELS-ALDER REACTION OF CHIRAL SULFINYLACRYLATE DERIVATIVES WITH FURAN AND 2-METHOXYFURAN, Heterocycles, 42(1), 1996, pp. 129-133
Asymmetric Diels-Alder reaction of chiral sulfinylacrylate derivatives
(1 and 2) with furan (3) and 2-methoxyfuran (4) proceeded under high
pressure (1.2 GPa) conditions to give endo cycloadducts(6c-f). The abs
olute configuration of adduct (6) was confirmed by conversion of 6e to
(-)-COTC (9).