Process for preparing dihalovinylcyclopropanecarboxylates

Details Process for preparing dihalovinylcyclopropanecarboxylates Process for preparing dihalovinylcyclopropanecarboxylates

1978-01-20

1980-07-22

Morgenstern, Norman

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

Organic compounds

Carboxylic acid esters

560219, C07C 6965

Patent

active

042140978

ABSTRACT:
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.

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patent: 3354196 (1967-11-01), Julia
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patent: 3994953 (1976-11-01), Babler
patent: 4024163 (1977-05-01), Elliott et al.
Elliott, Nature, 244, 456 (1973).
Shelton, Reid J. et al., J. Org. Chem., 23, 1876 (1958).
Chem. Abstracts, 8th Coll. Index, p. 22,632S (1971).

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