α-Trifluoromethyl-β-aryl enamines in the synthesis of trifluoromethylated heterocycles by the Fischer and the Pictet–Spengler reactions
作者:Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe
DOI:10.1016/j.tet.2009.06.120
日期:2009.9
α-Trifluoromethyl-β-aryl enamines were successfully used as synthetic equivalents of benzyltrifluoromethyl ketones in both the Fischer indole synthesis and the Pictet–Spengler reaction. Accordingly, 2-trifluoromethyl indoles and a variety of trifluoromethylated 4,5,6,7-terahydro-1H-pyridines including carbolines were synthesized in moderate to good yields.
Regioselectivity of the protonation of captodative enamines bearing a CF3 group
作者:Alexander Yu. Rulev、Igor A. Ushakov
DOI:10.1016/j.jfluchem.2009.10.001
日期:2010.1
Capodative enamines bearing a CF3 group are protonated at the N- or beta-C-atom depending on the structure of the initial base and the nature of protonating reagent. (C) 2009 Elsevier B.V. All rights reserved.