0-AETHYL-0-N-PROPYL-0-VINYL-THIONOPHOSPHORSAEUREESTER, VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG ALS INSEKTIZIDE UND AKARIZIDE

• Main Authors: MAURER, FRITZ, ROHE, LOTHAR, RIEBEL, HANSJO, HAMMANN, INGEBORG., 5000 KOELN, HOMEYER, BERNHARD., 5670 OPLADEN
• Format: Patent
• Language: German
• Published: 02.10.1975
• Edition: 2
• Subjects: 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

1457395 Unsaturated thiophosphate esters BAYER AG 26 Feb 1975 [27 Feb 1974] 8036/75 Headings C2P and C2C The invention comprises thionophosphate esters of the general formula which encompasses the cis and trans isomers and wherein R is H, C 1 -C 4 alkyl, C 1 -C 4 alkoxy or halogen and R1 is C 1 -C 4 alkyl, C 1 -C 4 alkoxy or halogen. They may be obtained by reacting a diester halide in which Hal is halogen with an #-cyanoacetophenone derivative of the formula or its enol form of the formula wherein M is an alkali metal-, alkaline earth metal-, or ammonium equivalent, optionally in the presence of an acid acceptor and/or a solvent. The products have pesticidal properties and may be used as active ingredients in conventional pesticidal formulations. The compound is obtained by adding a solution of NaCN in water and ethanol dropwise to 21,51-dichloro-2- bromoacetophenone in ethanol. Several other specific compounds of Formula V or Va are stated to be obtainable in an analogous manner. 21,51 - Dichloro - 2 - bromoacetophenone is prepared from p-dichlorobenzene and acetyl chloride by the Friedel-Crafts method followed by bromination in ether.