Process to bicyclic lactones

Details Process to bicyclic lactones Process to bicyclic lactones

1979-10-30

1981-08-11

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260141, C07D30793

Patent

active

042833418

ABSTRACT:
Lactones of the formula ##STR1## wherein R is hydrogen or a CX.sub.3 group, and each X is a chlorine or bromine atom, are converted to the known cis-3-(2,2-dihalovinyl)-2,2-dimethylcyclopropanecarboxylic acids or lower alkyl esters, from which pyrethroid insecticides are obtained.

REFERENCES:
Clark et al., Tetrahedron Letters 529, 1975.
Corey et al., J. Am. Chem. Soc. 94, 4014, (1972).
Danishefsky et al., (I), J. Am. Chem. Soc. 99, 4783, 1977, (II), 99, 7711, 1977.
House et al., J. Org. Chem. 33, 53, (1978).
Kirmse et al., Chem. Ber., 98, 4027, 1965.
Kondo et al., Tetrahdedron Letters, 4489, 1976.
Ziegler et al., Tetrahedron Letters, 2035, 1974.

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