Synthesis of α-trifluoromethyl-phenethylamines from α-trifluoromethyl β-aryl enamines and β-chloro-β-(trifluoromethyl)styrenes
作者:Vasiliy M. Muzalevskiy、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe、Valentine G. Nenajdenko
DOI:10.1016/j.jfluchem.2011.06.030
日期:2011.12
A novel synthetic approach towards α-trifluoromethyl-phenethylamines was elaborated by reduction of the electron deficient β-aryl-α-trifluoromethyl enamines and imines with sodiumcyanoborohydride in the presence of trifluoroaceticacid. The starting imines were prepared by the reaction of primary amines with β-aryl-α-trifluoromethyl enamines or β-chloro-β-(trifluoromethyl)styrenes.
Compounds of formula (I) where R1 is hydrogen, chlorine, fluorine or methyl, R?2 and R3¿, which may be the same or different from each other, are hydrogen, halogen, cyano, (C¿1?-C4)-alkyl, vinyl, ethynyl, (C1-C4)-alkoxy, (C1-C4)-alkoxy-(C1-C4)-alkyl, fluorovinyl or fluoroethyl, or R?2 and R3¿ together with the linking carbon atoms form a benzo ring, and R4 is (C¿2?-C4)-alkyl, (C2-C4)-alkenyl or (C3-C4)-alkinyl, each of which is substituted by at least two fluorine atoms and optionally substituted by C1-4-alkoxy, cyanomethoxy, (C3-C4)-alkenyloxy or (C3-C4)-alkinyloxy, are useful as pesticides, especially against insects, acarids and fungi. The invention includes a novel process for fluorinating certain pyrimidines.
Synthesis of trifluoromethyl alcohols from tert-butoxy-β-(trifluoromethyl)styrenes and trifluoromethylbenzyl ketones under the conditions of the Leuckart–Wallach reaction
作者:Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe
DOI:10.1016/j.jfluchem.2008.06.014
日期:2008.10
A novel pathway towards trifluoromethylalcohols by an unexpected reaction of tert-butoxy-β-(trifluoromethyl)styrenes or corresponding trifluoromethylbenzyl ketones under the conditions of the Leuckart–Wallach reaction was elaborated.