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.
Synthesis of substituted 1-trifluoromethyl and 1-perfluoroalkyl-3-(arylamino)prop-2-en-1-one: advances in the mechanism of Combes 2-trifluoromethyl and 2-perfluoroalkyl quinolines synthesis
作者:Salem El Kharrat、Philippe Laurent、Hubert Blancou
DOI:10.1016/j.tet.2013.12.073
日期:2014.2
We report a new synthesis and our study of the mechanism of formation of substituted 1-trifluoromethyl and 1-perfluoroalkyl-3-(phenylamino)prop-2-en-1-one starting from 3-(R-phenoxy)-3-perfluoroalkyl-prop-2-enals and arylamines. Reactivity study of the intermediates confirmed that 3-perfluoroalkyl-N,N'-diphenyl-1,5-diazapentadienes are the synthetic intermediates of the synthesis of 2-perfluoroalkylquinolines. The mechanism of the reaction of 1-trifluoromethyl and 1-perfluoroalkyl-3-(phenylamino)prop-2-en-1-one with POCl3 was studied. To our knowledge this is the first detection and isolation of N,N'-diaryldiazapentadiene derivatives as intermediates in the Combes F-alkyl substituted quinoline synthesis starting from enaminoketones. Finally, we succeeded isolating and identifying unsymmetrically substituted 2-perfluorolakyldiazapentadiene. (C) 2014 Elsevier Ltd. All rights reserved.
Nucleophilic substitution reactions in the series of perhaloalkyl?-aminovinyl ketones
作者:A. M. Platoshkin、Yu. A. Cheburkov、I. L. Knunyants
DOI:10.1007/bf00854417
日期:1971.9
The reaction of 2-fluoroalkyl-1-iodoethylenes with arylamines: a facile method for the synthesis of fluoroalkylated quinolines and enaminoketones
作者:Fulu Zhao、Xianjin Yang、Jintao Liu
DOI:10.1016/j.tet.2004.08.041
日期:2004.10
the subsequent acid promoted transformation of the products were described. In the presence of ZnCl2 and triethylamine, 1 reacted readily with various p-substituted anilines in HMPA under a vacuum of 60–70 mmHg to give the corresponding enaminoaldehydes (2) as a mixture of E- and Z-isomers. Cyclization of 2, without further purification in refluxing toluene, catalyzed by strong acids such as p-toluene
How 2-anilinovinyl perfluoroalkyl ketones can be mechanistically correlated with their cyclization products 2-(perfluoroalkyl)quinolines
作者:Manfred Schlosser、Holger Keller、Shin-ichi Sumida、Jin Yang
DOI:10.1016/s0040-4039(97)10304-5
日期:1997.12
of phosphoryl chloride, 2-anilinovinyl perfluoroalkyl ketones [e.g., 4-anilino-1,1,1-trifluorobut-3-en-2-one] afford 2-(perfluoroalkyl)quinolines [e.g., 2-(trifluoromethyl)quinoline]. As revealed by cross-over experiments, an efficient amine exchange process randomizes the structural component in the final products but not in their aminoenone precursors. 1,3-Diaminoallyl cations (vinologous formidinium