A Cascade Approach to Captodative Trifluoromethylated Enamines or Vinylogous Guanidinium Salts: Aromatic Substituents as Switches of Reaction Direction
作者:Alexander Yu. Rulev、Vasiliy M. Muzalevskiy、Evgeniy V. Kondrashov、Igor A. Ushakov、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe、Valentine G. Nenajdenko
DOI:10.1002/ejoc.200900926
日期:2010.1
β-Halo-β-(trifluoromethyl)styrenes readily react with a variety of nitrogen nucleophiles bearing primary amino groups to afford either the captodative trifluoromethylated enamines or vinylogous guanidinium salts in a selective fashion depending on the electronic natures of the aromatic substituents.
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.