CHEMICAL AND ELECTROCHEMICAL REDUCTIONS OF SOME ALLYL TYPE HALIDES CATALYZED BY VITAMIN-B-12

Chemical and electrochemical reductions of some allyl type halides cat alyzed by vitamin B-12 have been studied. Geranyl bromide 1 and methyl (2E, 6E) 8-bromo-3,7-dimethylocta-2,6-dienoate 2 have been used as su bstrates and subjected to chemical and electrochemical reduction. The formation and distribution of the reaction products of these substrate s can be explained by free radical mechanisms, namely by reductive rea ctions of some functional groups, rearrangements and intermolecular co upling of intermediate radicals.