S-(2-CHLORO-2-BROMO-ETHYL-(DI)THIO-PHOSPHORIC AND PHOSPHONIC ACID ESTERS

1,226,137. Halogen-containing thiophosphate or thiophosphonate asters. FARBENFABRIKEN BAYER A.G. 29 Aug., 1968 [1 Sept., 1967], No. 41317/68. Heading C2C. [Also in Division A5] Novel phosphorus esters of the formula wherein R 1 is a C 1 -C 4 alkyl or C 1 -C 4 alkoxy radical either of which may be su...

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Hauptverfasser:	HANSHELMUT SCHLOR, INGEBORG HAMMANN, BERNHARD HOMEYER
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMISTRY FISHING FORESTRY HUMAN NECESSITIES HUNTING METALLURGY ORGANIC CHEMISTRY PEST REPELLANTS OR ATTRACTANTS PLANT GROWTH REGULATORS PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF TRAPPING
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Zusammenfassung:	1,226,137. Halogen-containing thiophosphate or thiophosphonate asters. FARBENFABRIKEN BAYER A.G. 29 Aug., 1968 [1 Sept., 1967], No. 41317/68. Heading C2C. [Also in Division A5] Novel phosphorus esters of the formula wherein R 1 is a C 1 -C 4 alkyl or C 1 -C 4 alkoxy radical either of which may be substituted by halogen, R 2 is a C 1 -C 4 alkyl or haloalkyl radical and X is O or S are obtained by reacting a thiophosphate or thiophosphonate salt of the formula (R 1 )(R 2 O)P(X)SM in which M is a monovalent metal equivalent, e.g. Na or K, or an ammonium group, with 1 - chloro - 1,2 - dibromoethane in the presence of an organic solvent or diluent. Specified solvents are hydrocarbons, chlorinated hydrocarbons, ethers, alcohols ketones, and particularly low-boiling aliphatic nitriles, e.g. acetonitrile or propionitrile. It is preferred to use about 2 moles of the chlorodibromoethane per mol. of the thiophosphate or thiophosphanate salt and suitable reaction temperatures are from 30 to 100 C. or the boiling point of the mixture. The products have pesticidal properties (see Division A5).