Process for preparing cyclopropane carboxylic acid derivatives

Details Process for preparing cyclopropane carboxylic acid derivatives Process for preparing cyclopropane carboxylic acid derivatives

1979-07-17

1983-10-25

Demers, Arthur P.

Harness for working animal

424274, 542426, 562506, C09B 2300

Patent

active

044120699

ABSTRACT:
A novel process for the preparation of a compound of the formula ##STR1## wherein X is selected from the group consisting of oxygen and sulfur and n is 1,2 or 3 comprising reacting in an organic solvent in the presence of a strong base the lactone of cis 2,2-dimethyl-3S-(dihydroxymethyl)-cyclopropane-1R-carboxylic acid with a compound of the formula ##STR2## to obtain a compound of the formula ##STR3## reacting the latter with an acid agent in an apolar organic solvent to obtain a compound of the formula ##STR4## and reacting the latter with a basic agent in an apolar organic solvent to obtain a compound of formula I useful for the preparation of insecticidal esters and the novel compounds of formula I wherein n is 1 or 3.

REFERENCES:
patent: 3714153 (1973-01-01), Martel et al.
patent: 3723469 (1973-03-01), Martel
patent: 3842177 (1974-10-01), Martel et al.
patent: 4014918 (1977-03-01), Martel
patent: 4166063 (1979-08-01), Martel et al.

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