Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo

Details Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo

1981-01-16

1982-04-27

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

562401, C07C 6104, C07B 1900

Patent

active

043270387

ABSTRACT:
A method for preparing (1R,cis)-2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropanecarboxylic acid useful as an acid part of practically effective insecticidal esters, which comprises reacting 2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropanecarboxylic acid containing 70% or more of the cis-form with an equimolar or less amount of (+)-1-phenyl-2-(p-tolyl)ethylamine, allowing a diastereomer salt to precipitate from a solvent, then, if necessary, purifying said salt, and decomposing said salt with a base or an acid to yield (1R,cis)-2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropanecarboxylic acid.

REFERENCES:
patent: 3646118 (1972-02-01), Goffinet et al.
patent: 3739019 (1973-06-01), Ueda et al.
patent: 3842125 (1974-10-01), Horiuchi et al.
patent: 3879451 (1975-04-01), Yoshioka et al.
patent: 4236026 (1980-11-01), Naumann
Nature, 244, pp. 456-457 (1973), "Potent Pyrethroid Insecticides from Modified Cyclopropane Acids".
Pestic. Sci., 5, pp. 791-799 (1974), "The Pyrethrins and Related Compounds", Paul E. Burt et al.
Eliel; Stereochemistry of Carbon Compounds, 47-83 (1962) (Published by McGraw-Hill Book Co., Inc. (N.Y.)).

Affiliated with

Also associated with

Rating

Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing optically active 2,2-dimethyl-3-(2,2-dichlo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2197316