Selective formation of substituted cyclopentane derivatives from hexa-1,5-dienes via oxidative cyclization in the presence of Pd(OAc)<sub>2</sub>–MnO<sub>2</sub>–benzoquinone as catalyst
Hexa-1,5-dienes undergo oxidative ring closure catalysed by palladium acetate using p-benzoquinone–manganese dioxide as oxidant to give acetoxy-substituted methylene-cyclopentane derivatives.
Palladium-catalyzed oxidative cyclization of 1,5-dienes. Influence of different substitution patterns on the regio- and stereochemistry of the reaction