GB722475A - Compositions for combatting pests containing acetylene carbinols as active ingredients thereof - Google Patents

Abstract

Halogenated acetylene carbinols of the general formula <FORM:0722475/IV (b)/1> (wherein the X's represent fluorine, chlorine or bromine and may be the same or different) are prepared by reacting a ketone of the general formula <FORM:0722475/IV (b)/2> (wherein the X's are as above defined) with a metal acetylide or with acetylene in the presence of alkali hydroxide or alkali amide. In an example, potassium hydroxide in cooled dry tetrahydrofuran is saturated with acetylene, ethereal 4 : 41-difluorobenzophenone added dropwise, acetylene again passed in, and after standing 1 : 1-bis-(41-fluorophenyl) propine-2-ol-1 is isolated by treatment with ice, ether extraction and fractionation. The corresponding 1 : 1 - bis - (41-chlorophenyl)-; 1 : 1 - bis - 41 - bromophenyl)-; 1 - (41 - chlorophenyl) - 1 - (411 - bromophenyl)-; 1 - (41 - fluorophenyl) - 1 - (411-chlorophenyl)- and 1-(41-fluorophenyl)-1-(411 - bromophenyl) - propine - 2 - ol - 1 compounds are similarly prepared. The products are useful as pesticides (see Group VI)ALSO:Pesticidal compositions comprise an acetylene carbinol of the general formula <FORM:0722475/VI/1> (wherein the X's represent fluorine, chlorine or bromine and may be the same or different) together with a solid pulverulent carrier, a wetting agent or protective colloid or emulsifying agent or an inert organic liquid having an initial b.pt. above 105 DEG C. The composition may be emulsified or dispersed in aqueous medium and may incorporate other fungicidal, bactericidal, acaricidal, ovicidal or insecticidal agents e.g. benzyl benzoate; 2.7-dimethyl thianthrene; phthalonitrile; a : a -bis (p-chlorophenyl) b :b :b -trichlorethane, or -b :b -dichlorethane; 1 : 2 : 4 : 5 : 6 : 8 : 8-octachloro -3a : 4 : 7 : 7a -tetrahydro -4 : 7 -methanoindane; diethyl - p - nitrophenyl - thiophosphate; 5 : 5 -dimethyl dihydro resorcinol -N : N- di-methyl carbamate; 4 : 6 -dinitro-o-cresol; nitrated naphthylamines; mercury compounds; copper compounds and sulphur. Specified pulverulent carriers are talc, kaolin, bentonite, chalk, silicic acid, tricalcium phosphate, whiting, limestone, bole, magnesia usta, kieselguhr, boric acid, powdered cork, and powdered wood. Specified inert solvents are castor oil, paraffin oil, hydrogenated naphthalenes, alkylated naphthalenes, solvent naphtha, kerosene, and xylene. Specified emulsifying and dispersing agents are natural and synthetic soaps, turkey red oil, fatty alcohol sulphonates, sulphonated fats and fatty acid esters, high molecular quarternary ammonium compounds, ethylene oxide condensation products with aliphatic or araliphatic compounds (e.g. stearyl alcohol, alkyl phenols), sodium dibutyl naphthalene sulponate, and sulphite waste liquor. The compositions may be applied by dusting, spraying and other known methods.