Regioselective cyclopropanation of (dimethylvinylidene)carbene into the .alpha.,.beta.-unsaturated double bond of allylic alcohols in the presence of other olefinic groups
Regioselective cyclopropanation of (dimethylvinylidene)carbene into the .alpha.,.beta.-unsaturated double bond of allylic alcohols in the presence of other olefinic groups