Abstract: The optically active .gamma.-lactone of (1R, cis)-2, 2-dimethyl-3-hydroxymethyl-cyclopropane-1-carboxylic acid, which is useful as an intermediate in the production of pyrethroid insecticides, may be made from optically active (-)car-3-en-5-one by a two stage oxidation process followed by hydrolysis of the intermediate obtained.
Type:
Grant
Filed:
December 29, 1983
Date of Patent:
February 4, 1986
Assignees:
Indian Explosives Limited, The Alkali and Chemical Corporation of India, Chemicals and Fibres of India Limited
Inventors:
Arun K. Mandal, Shailendra R. Bhandari, Satish W. Mahajan