- Investigation on the acylation of heterocyclic alcoholate anions with O,O-dialkyl phosphorochloridothioate in water solvent
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The acylation of some heterocyclic alcoholate anions with O,O-dialkyl phosphorochloridothioate has been investigated. Higher yields and fewer byproducts were achieved in water at 50 °C by employing an effective phase-transfer catalyst (PTC) (benzyl triethylammonium chloride [BTEAC]), acylation catalyst (AC) (4-dimethylaminopyridine), and surfactant (sodium dodecyl sulfate), under weakly basic (pH 9.5～10) conditions. This reaction can also be applied to synthesize other insecticides with excellent yields.
- Ge, Xin,Qian, Chao,Chen, Xinzhi
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- Concentrates of organophosphorous insecticides
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A low volatile organic compound co-solvent system is disclosed for preparing emulsion concentrates of low melting organophosphorous insecticides wherein the bioefficacy of the insecticide active is significantly enhanced. The co-solvent system comprises a water-soluble ethoxylated fatty acid/rosin acid-nonionic surfactant composition.
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- Insecticidal composition for agricultural and horticultural use
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A synergistic insecticidal composition comprising a nitromethylene derivative of the formula STR1 in which X is a lower alkyl group, a lower alkoxy group or a halogen atom, n is 0, 1 or 2, and m is 2 or 3, and an insecticide which is a carboxylic acid ester, carbamate, organophosphate ester or one of a group of specific compounds.
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- Condensation products
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Formamidine compounds of the formula EQU1 or WHEREIN R1 represents a substituted or unsubstituted phenyl radical, R2 represents hydroogen, alkyl, alkenyl or alkinyl and R3 represents acyl their manufacture and their use in pest control.
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