Yc. Xu et al., REGIOSELECTIVE AND STEREOSELECTIVE, DDQ-INDUCED OXIDATIVE COUPLING OFISOCHROMANS AND ISOTHIOCHROMAN WITH ALCOHOLS, Tetrahedron letters, 34(24), 1993, pp. 3841-3844
2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) induced oxidative coupling
of isochromans or isothiochroman and alcohols proceeds in high yield w
ith good regio- and stereochemical control.