Substituted valeric acid

Details Substituted valeric acid Substituted valeric acid

C - Chemistry, Metallurgy

12

P

C12P 7/50 (2006.01) A23L 1/226 (2006.01) C07C 59/215 (2006.01) C07D 307/60 (2006.01) C12P 7/42 (2006.01) C12P 41/00 (2006.01)

Patent

CA 2121972

Abstract The invention is concerned with two new, optically active forms of 2-keto-3-methyl-4-hydroxy-valeric acid of the formula Image I wherein the C atom 4 has the (S)-configuration. The C atom 3 can have the (R)-configuration or the (S)-configuration. The invention is also concerned with a microbiological process for the manufacture of the compounds I. This process comprises reacting 4-hydroxy-isoleucine (2S, 3R, 4S) (= L-4-hydroxyisoleucine) of the formula Image II with microorganisms which have L-amino acid oxidase (EC 1.4.3.2.) activity or with a L-amino acid oxidase. The compounds I are interesting intermediates for the production of the optically active (5S)-3-hydroxy-4,5-dimethyl- 2(5H)-furanone.

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