Crystalline phenylacetate enantiomer pair, and preparation...

Details Crystalline phenylacetate enantiomer pair, and preparation... Crystalline phenylacetate enantiomer pair, and preparation...

C - Chemistry, Metallurgy

07

C

260/477.5, 260/4

C07C 69/614 (2006.01) A01N 37/08 (2006.01) A01N 37/10 (2006.01) A01N 37/34 (2006.01) A01N 37/38 (2006.01) C07B 57/00 (2006.01) C07C 57/00 (2006.01) C07C 59/00 (2006.01) C07C 69/157 (2006.01) C07C 255/38 (2006.01)

Patent

CA 1231718

ABSTRACT CRYSTALLINE PHENYLACETATE ENATIOMER PAIR, AND PREPARATION OF A PESTICIDAL ENANTIOMER PAIR A pesticidal phenylacetate rich in the Y enantiomer pair is prepared by precipitating the novel intermediate crystalline phenylacetate X enantiomer pair in the presence of crystals of phenylacetate X from a solution of racemic phenylacetate and recovering the filtrate rich in the Y enantiomer pair. The phenylacetate X crystals are redissolved, epimerized and the resulting racemate recycled to improve the yield of phenylacetate Y enantiomer pair.

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