C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
195/131, 195/34.
C12P 7/40 (2006.01) C07D 213/643 (2006.01) C07D 241/44 (2006.01) C07D 277/68 (2006.01) C12N 1/20 (2006.01) C12P 13/00 (2006.01) C12P 17/12 (2006.01) C12P 17/16 (2006.01) C12P 17/18 (2006.01) C12P 41/00 (2006.01)
Patent
CA 1215924
ABSTRACT PROCESS FOR PRODUCING OPTICALLY ACTIVE ARYLOXYPROPIONIC ACIDS AND DERIVATIVES THEREOF USEFUL AS HERBICIDES ?-Aryloxypropionic acids and derivatives of formula I below are stereospecifically inverted by contact with a microorganism having a stereospecific inverting enzyme system or with that enzyme system at least partially extracted from the microorganism. This process enables the [S] enantiomer of the compound of formula I Image (I) wherein E is OR1 or Image , R1 is an unsubstituted or substituted aryl or heterocyclic ring system, and R2 is hydrogen or methyl, U and V each independently represent hydrogen or halogen and R is a carboxyl group, or an enzymic and herbicidal equivalent thereof, to be converted to the corresponding [R] enantiomer which is the active herbicidal enantiomer. Specific microorganisms which effect the inversion are a Rhodococcus sp. (NCIB 11880), Rhodococcus rhodochrous (ATCC 13808), Rhodococcus sp. (NCIB 11276) and Botrytis cinerea (ATCC 28387).
459750
Barlow Charles Brian
Imperial Chemical Industries Plc
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