O,O-Diethyl-0-1-(2,4-dichlorophenyl)-2,2-dibromovinyl phosphate used to control the Colorado potato beetle

• Main Authors: SLEDZINSKI; BOHDAN, MAJDA; ALEKSANDER, CIESLAK; LUDWIKA, KROCZYNSKI; JOZEF, ZWIERZAK; ANDRZEJ
• Format: Patent
• Language: English
• Published: 23.12.1975
• 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; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; THEIR RELEVANT APPARATUS; TRANSPORTING; TRAPPING

An 0,0-diethyl-0-1-(2,4-dichlorophenyl)-2,2-dibromivinyl phosphate of the formula IS USEFUL AS AN INSECTICIDE, ESPECIALLY FOR Colorado potato beetles, and can be prepared by reacting 2,2,2-tribromo-2',4'-dichloroacetophenone with triethyl phosphite, or, alternatively, by reacting phosphoryl chloride with 2,2-dibromo-2',4'-dichloroacetophenone in the presence of an alkaline agent, preferably a t-aliphatic amine, and esterifying the resultant product in the presence of a hydrochloride acceptor, preferably pyridine or triethylamine.