Process for preparing racemic dihalovinylcyclopropane carboxylic

Details Process for preparing racemic dihalovinylcyclopropane carboxylic Process for preparing racemic dihalovinylcyclopropane carboxylic

1989-05-09

1990-10-09

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

562867, 560124, C07C 6140

Patent

active

049622331

ABSTRACT:
Racemic dihalovinylcyclopropane carboxylic acid halides, which are intermediates of such insecticides as permethrin, cypermethrin etc., are prepared by allowing phosphorus iodides, silicon iodides or boron iodides to react with optically active dihalovinylcyclopropane carboxylic acid halides of the formula: ##STR1## wherein X and Y stand for halogen atoms and the mark * indicates an asymmetric carbon atom.

REFERENCES:
patent: 3090307 (1963-05-01), Illing et al.
patent: 3989750 (1976-11-01), Nagase et al.
patent: 4182906 (1980-01-01), Suzukamo et al.
CA(95):97173f, 1981.

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