Novel lactones of cis 2,2-dimethyl-cyclopropane-1-carboxylic aci

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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2603433R, C07C 6140, C07D30793

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active

042811821

ABSTRACT:
Novel lactones of cis 2,2-dimethyl-cyclopropane-1-carboxylic acids of the formula ##STR1## wherein X.sub.1, X.sub.2 and X.sub.3 when identical are selected from the group consisting of chlorine and bromine and when at least two are different, are selected from the group consisting of fluorine, chlorine and bromine and a novel process for their preparation and a process for the preparation of cis 2,2-dimethyl-cyclopropane-1-carboxylic acids of the formula ##STR2## The acids of formula IV are useful to prepare esters of elevated insecticidal activity.

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Toshio et al., Chem. Abst., 84:164253v.
Aratani et al., Tetrahedrin Letters, No. 21, pp. 1707-1710, 1975.
March, Advanced Org. Chem., pp. 771-772.

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