SYNTHESIS OF BETA-DIKETONE ALKALINE EARTH METAL COMPLEX

摘要

PROBLEM TO BE SOLVED: To obtain the subject compound having excellent thermal stability and useful as a raw material for chemical vapor-phase evaporation process in a short time at a low cost without using excess diketone by directly reacting an elemental alkaline earth metal with a diketone in the presence of an alcohol containing not more than specific amount of water. SOLUTION: The objective compound such as bis [dipivaloylmethanato]calcium is produced by directly reacting (A) an elemental alkaline earth metal such as calcium with (B) aβ-diketone such as dipivaloylmethane preferably at a nearly staichiometric molar ratio (1:2) in the presence of (C) an alcohol (e.g. ethanol) having a water content of <=200 ppm preferably in an inert gas atmosphere preferably under normal pressure under heating at 20-100 deg.C.