An efficient synthesis of fluorine-containing polyfunctional 1,2,3,4-tetrahydropyrimidines
作者:Fu-Lu Zhao、Jin-Tao Liu
DOI:10.1016/j.jfluchem.2004.05.016
日期:2004.10
A convenient one-pot synthesis of fluorine-containing 1,2,3,4-tetrahydropyrimidines was described. Fluoroalkylated enaminoketones reacted readily with primary amines and formalin (37% formaldehyde solution) under mild conditions to give the title compounds in high yields. α-Amino acids were introduced into tetrahydropyrimidine rings for the first time by this reaction.
Regioselective reactions of N-monosubstituted β-aminovinyl trifluoromethyl ketones with tosyl isocyanate
作者:Igor I Gerus、Natalie V Lyutenko、Alexey D Kacharov、Valery P Kukhar
DOI:10.1016/s0040-4039(00)01804-9
日期:2000.12
The NH and α-CH insertion reactions of tosyl isocyanate with N-monosubstituted 4-amino-1,1,1-trifluorobut-3-en-2-ones have been studied. The regioselectivity of this reaction depends on the temperature, the nature of the solvent and the catalyst: high temperatures or basic catalysts direct in favour of NH insertion while low temperatures direct the process in favour of α-CH insertion.