NICKEL MEDIATED FLASH ISOMERIZATION - A NEW APPROACH TO 1,4-BUT-1-ENE DIOL DERIVATIVES

Fast isomerization of cis 1,4-but-2-endiol derivatives (1) to 1,4-but-1-endiol derivatives (2) was carried out in mild conditions. The activity of the proposed Ni-hydride species is closely correlated with the nature of the protecting groups of the alcoholic functions of 1, which are also responsible for the regio and stereo chemical aspects of the reaction.