M. Node et al., A FACILE ASYMMETRIC-SYNTHESIS OF COREY LACTONE UTILIZING C-2-SYMMETRICAL DIMETHYL IS-BICYCLO[3.3.0]OCTAN-2,6-DIENE-2,6-DICARBOXYLATE, Heterocycles, 46, 1997, pp. 535-540
Optically pure Corey lactone [(-)-1] was conveniently synthesized from
an optically pure C-2-symmetric diester [(+)-3] which was prepared by
lipase-catalyzed demethoxycarbonylation of bicyclic tetraester (2).