Lactones

Details Lactones Lactones

C - Chemistry, Metallurgy

07

C

260/485.3, 260/4

C07C 69/65 (2006.01) C07C 121/413 (1985.01)

Patent

CA 1233832

Abstract "Lactones" A process for the preparation of a haloacid ester of the formula: Y2C = CH.CH Hal.C(CH3)2.CHR.CO2R1 wherein R1 is a lower alkyl group, R is a hydrogen atom or a cyano, carboxy, methyl, ethyl, isopropyl, n-propyl, tert-butyl, n-butyl, carboxymethyl or cyanomethyl group and each Y is a chlorine or bromine atom, and Hal represents a chlorine or bromine atom, which comprises treating a 4-haloacid halide having the formula: Y2C = CH.CH Hal.C(CH3)2CHR.COHal with an alcohol of the formula R1OH. The products are intermediates for insecticidal esters.

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