METHOD OF PREPARING PHENOXYPROPIONIC ACID DERIVATIVES (VARIANTS) Russian patent published in 2001 - IPC

Abstract RU 2174514 C2

FIELD: agriculture. SUBSTANCE: described is method of preparing D(+)- 2-[4-(6-chloro-2-quinoxalyloxy)phenoxy] propionic acid which comprises reacting alkali metal salt of 4-(6-chloro-2-guinoxalyloxy)phenol with alkali metal salt of L-2-(chloropropionic acid in aromatic hydrocarbon solvent in the presence of aprotic polar solvent to prepare alkali metal salt of D(+)-2-[4-(6-chloro-2-guinoxalyloxy)phenoxy] propionic acid and treating thereof with acid. Phenoxypropionic acid derivatives are useful as selective herbicides for treating foliage to control grassy weeds in sown broad-leaf agricultural crops. EFFECT: desired products having high degree of conversion, good yield without deterioration in optical purity. 18 cl, 10 ex

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RU 2 174 514 C2

Authors

Fukuda Kenzo

Khatanaka Masataka

Makabe Takakhiro

Isii Keniti

Dates

2001-10-10—Published

1997-05-21—Filed