PENTAFLUOROBENZYL 1R,3S-2,2-DIMETHYL-3-(2-CHLOROPHENYL) CYCLOPROPANCARBOXYLATE Russian patent published in 1994 - IPC

Abstract RU 2005716 C1

FIELD: insecticide agent for use in agriculture. SUBSTANCE: pentafluorobenzyl 1R, 3S-2,2-dimethyl-3-(2-chlorophenyl) cyclopropancarboxylate of formula 1a, b , wherein a) , b) [α]2259

₄ is prepared as mixture of isomers 1a and 1b in their ratio of 1: 2 to 1: 4, m. p. 82-84 C, SOCl₂. Reagent 1: acid of formula II SOCl₂ as mixture of Z, E-isomers in their ratio of (2-4): 1. Reagent 2: CH₂Cl₂. Reaction conditions: reaction is carried out at temperature about 20 C for 10 hrs followed by removal of

excess of pentafluorobenzyl alcohol in

. EFFECT: increased yield of the end product. 2 tbl

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RU 2 005 716 C1

Authors

Rukavishnikov A.V.

Tkachev A.V.

Dates

1994-01-15—Published

1991-06-26—Filed