Preparation of vitamin k1 and k2 of vitamin

摘要

P the invention relates to a process for the preparation of progenitors hydrogenated vitamins k1 and k2. / p & & p & is reacted with the 2 - methyl - 2,3 - dihydronaphtoquinone (1,4) on the bromide farnesyl or geranylgeranyl or chlorides, in a system comprising an aqueous phase formed of a solution of alkali and an oily phase formed of a hydrophobic organic solvent in the presence of some of the quaternary ammonium salts or tetraalkylphosphonium. / p & & p & the progenitor may be converted into vitamin k1 or k2. / p