Insecticides

Details Insecticides Insecticides

1974-08-13

1977-05-17

Gerstl, Robert

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260326A, 260465D, 260468H, 2603474, 260544L, 2605011, 26050117, 260274, 260285, 260304R, 260306, C07C 6974, C07C12175, C07C30754, C07C20418

Patent

active

040241637

ABSTRACT:
New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogeno, lower alkyl (which is different to R.sup.2 when R.sup.2 represents a lower alkyl group) or carbo(loweralkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a cycloalkylene ring having at least one endocyclic carbon to carbon double bond; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl and (b) R.sup.3 contains at least 2 carbon atoms when R.sup.1 and R.sup.2 each represent hydrogen; and R represents a group which form insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl. The esters are prepared by forming the ester linkage conventionally or by a Wittig reaction using a 3-formyl- or 3-acetyl-2,2-dimethyl cyclopropane carboxylic acid esterified with the desired residue or by an alkyl group which is subsequently converted to the desired residue.

REFERENCES:
patent: R28110 (1974-08-01), Osbond et al.
patent: 3509180 (1970-04-01), Elliot
patent: 3666789 (1972-05-01), Itaya et al.
patent: 3683005 (1972-08-01), Sota
patent: 3761506 (1973-09-01), Osbond et al.
patent: 3766218 (1973-10-01), Veda et al.
patent: 3813427 (1974-05-01), Osbond et al.
patent: 3835176 (1974-09-01), Matsuo et al.
patent: 3847944 (1974-11-01), Ohno et al.
patent: 3850977 (1974-11-01), Itaya et al.
Forkas et al., Chem. Listy. 52 688 (1958).

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