Process for producing 1,2-propanediol

C - Chemistry – Metallurgy – 07 – C

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C07C 31/20 (2006.01) C07C 29/58 (2006.01)

Patent

CA 2290496

The present invention provides a process for obtaining 1, 2- propanediol or optically active substances thereof in high yields and at a low cost using readily available starting materials. According to the process of the present invention, 3-halogeno-1,2-propanediol of the general formula [I] is catalytically hydrogenated in an alcoholic solvent having two or more carbon atoms in the presence of a base of an equivalent or less to the starting material to give 1,2-propanediol of the formula [II]. In the formula [I], X stands for a halogen atom. Image

L'invention concerne un procédé pour produire, avec un haut rendement et de faibles coûts, du 1,2-propanediol ou des isomères optiquement actifs de ce dernier, à partir d'un matériau de départ facilement disponible. Ce procédé consiste à hydrogéner par voie catalytique un 3-halogéno-1,2-propanediol, de formule générale (I) dans un solvant alcoolique contenant au moins deux atomes de carbone, en présence d'au moins un équivalent d'une base pour donner un 1,2-propanediol de formule (II). Dans la formule (I), X représente un atome d'halogène.

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