SYNTHESIS OF BENZYL ESTERS OF 2,2-DIMETHYL-3-(4-DIFLUOROMETHOXYPHENYL)CYCLOPROPANE CARBOXYLIC ACID - CYCLIC ANALOGS OF PYRETHROID FLUOROCITRINATE
3-Phenoxybenzyl and α-cyano-3-phenoxybenzyl esters of 2,2-dimethyl-3-(4-difluoromethoxyphenyl)cyclopropane carboxylic acid have been synthesized.The latter compound, which is the cyclopropane analog of pyrethroid fluorocitrinate, has moderate insecticide activity toward the housefly.
Shapiro, E. A.,Eismont, M. Yu.,Pereverzeva, Yu. O.,Nefedov, A. O.,Srashnenko, A. V.,et al.
p. 573 - 577
(2007/10/02)
Benzylic Bromination-Acetoxylation of Toluenes by Bromide Ion Catalyzed Thermal Decomposition of Peroxydisulfate in Acetic Acid in the Presence of Acetate Ions
Side-chain bromination and acetoxylation of alkylaromatics by halide ion induced decomposition of potassium peroxydisulfate in acetic acid have been studied by product analysis techniques.Catalytic amounts of lithium bromide in the presence of sodium acetate were found effective in promoting benzylic bromination, followed by conversion to the corresponding benzyl acetates by reaction with acetate.The reaction is interpreted to take place by the redox and free-radical chain mechanism involving bromine atoms (ρ = -1.38 vs. ? + for substituted toluenes).In competiti ve experiments, benzyl and 4-nitrobenzyl acetates were found lees reactive than the corresponding toluenes in acetic acid with the couple S2O82-/Br- but more reactive in carbon tetrachloride with N-bromosuccinimide.
Citterio, Attilio,Santi, Roberto,Pagani, Anselmo
p. 4925 - 4927
(2007/10/02)
Process for brominating side chain of m-phenoxytoluene
A side chain of m-phenoxytoluene is brominated with a polyhalogenated ethane having the formula STR1 wherein W and Z respectively represent Cl or Br and X and Y respectively represent Cl, Br or H, as a brominating agent in a liquid phase in the presence of an amorphous carbon.
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(2008/06/13)
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