Improved process for the preparation of...

Details Improved process for the preparation of... Improved process for the preparation of...

C - Chemistry, Metallurgy

07

C

C07C 51/285 (2006.01) C07D 305/12 (2006.01)

Patent

CA 2523096

An improved process for the preparation of 3,4-dihydroxybutanoic acid (1) and salts thereof from a D- or L-hexose source is described. The process uses an alkali metal or alkaline earth metal hydroxide and peroxide oxidizing agent to convert the D- or L-hexose source to (1) by maintaining a low concentration of base and oxidizing agent in the reaction mixture at any one time and by maintaining a temperature between about 25°C and 80°C. Upon acidification of the reaction mixture the 3-hydroxylactone is produced. The compound (1) is useful as a chemical intermediate to naturally occurring fatty acids and is used to prepare 3, 4-dihydroxybutanoic acid-gamma-lactone (2) and furanone (3), particularly stereoisomers of these compounds.

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