Patent ID: 6090980
Filing Date: 2000-07-18
Classification: C07F

Abstract:
A process for the preparation of iminotris(dimethylamino)phosphorane, which comprises:reacting aminotris(dimethylamino)phosphonium chloride with an aqueous solution of the hydroxide of an alkali metal or alkaline earth metal in the presence of a solvent in which the chloride and hydroxide of said alkali metal or alkaline earth metal are sparingly soluble, whereby iminotris(dimethylamino)phosphorane is formed;distilling off water at a temperature of 70.degree. C. or lower from the reaction mixture;removing solids from the thus-concentrated reaction mixture by solid-liquid separation; and thendistilling the resultant mother liquor to obtain iminotris(dimethylamino)phosphorane.