Gj. Boons et al., DISPIROKETALS IN SYNTHESIS .4. ENANTIOSELECTIVE DESYMMETRIZATION OF GLYCEROL USING A C2-SYMMETRICAL DISUBSTITUTED BIS-DIHYDROPYRAN, Tetrahedron letters, 34(35), 1993, pp. 5649-5652
Glycerol may be simultaneously protected and enantioselectively desymm
etrised by dispiroketal formation with ,2'-dimethyl-3,3',4,4'-tetrahyd
ro-6,6'-bi-2H-pyran 1.