Z. Ferjancic et al., FREE-RADICAL MEDIATED CONSTRUCTION OF SMALL RING COMPOUNDS - THE DOUBLE ANNULATION OF BICYCLO[3.1.0]HEX-2-ENES, Tetrahedron letters, 38(23), 1997, pp. 4165-4168
A free radical approach to fused cyclopropane derivatives is described
. Homolytic decomposition of thiohydroxamic esters 4a-e in the presenc
e of dimethyl acetylendicarboxylate affords bicyclo[3.1.0]hex-2-enes 6
a-e in moderate yields. (C) 1997 Elsevier Science Ltd.