Patent ID: 6369282
Filing Date: 2002-04-09
Classification: C07C

Abstract:
A process for preparing alkynediols of the formula (I)R1R2C(OH)â€”Câ‰¡Câ€”C(OH)R1R2â€ƒâ€ƒ(I) whereR1, R2 are each independently H, or a C1-20-hydrocarbon radical which may be substituted by one or more C1-6-alkyls and/or be interrupted by nonadjacent heteroatoms and/or contain Câ€”C double or triple bonds, by reacting compounds of formula (II) R1â€”C(â‰¡O)â€”R2â€ƒâ€ƒ(II) with acetylene in a polar aprotic solvent in the presence of basic alkali metal salts as catalysts, wherein alkali metal alkoxides are used as basic catalysts, and wherein the alcohols on which the alkali metal alkoxides are based are selected from among alkynols of the formula (III)R1R2C(OH)â€”Câ‰¡CHâ€ƒâ€ƒ(III).