Ak. Bhattacharya et al., Selective Reduction of the Exomethylene Group of alpha-methylene gamma- ordelta-lactones with CdCl2-Mg-MeOH-H2O, J CHEM R-S, (12), 1998, pp. 768-769
The strained exomethylene group of the alpha-methylene gamma- or delta-lact
one moiety in sesquiterpenoids can be selectively reduced with the CdCl2-Mg
-MeOH-H2O reagent system.