Em. Codesido et al., Access to [6.4.0]carbocyclic systems by tandem metathesis of dienynes. A step toward the synthesis of a preD(3)-D-3 transition state analogue, ORG LETT, 3(10), 2001, pp. 1483-1486
A new approach to the synthesis of linearly fused 6-8-6 tricarbocyclic syst
ems, tandem ring-closing metathesis of dienynes, allows access to compounds
with a carbon framework analogous to the proposed transition state of the
isomerization of previtamin D-3 to vitamin D-3.