Regioselective synthesis of 5-trifluoromethyl-1,2,3-triazoles via CF3-directed cyclization of 1-trifluoromethyl-1,3-dicarbonyl compounds with azides
摘要:
1-Trifluoromethyl-substituted 1,3-dicarbonyl compounds are shown to undergo 100% regioselective cyclization in reactions with alkyl and aryl azides to form 4-acyl-5-trifluoromethyl-1,2,3-triazoles. The reaction represents a general method for the synthesis of otherwise difficulty available 4-acyl-5trifluoromethyl-1,2,3-triazoles. The directing role of the trifluoromethyl group is discussed in the light of stepwise and concerted mechanisms for this reaction. (C) 2011 Elsevier Ltd. All rights reserved,
Regioselective synthesis of 5-trifluoromethyl-1,2,3-triazoles via CF3-directed cyclization of 1-trifluoromethyl-1,3-dicarbonyl compounds with azides
作者:Yury A. Rozin、Johann Leban、Wim Dehaen、Valentine G. Nenajdenko、Vasiliy M. Muzalevskiy、Oleg S. Eltsov、Vasiliy A. Bakulev
DOI:10.1016/j.tet.2011.10.110
日期:2012.1
1-Trifluoromethyl-substituted 1,3-dicarbonyl compounds are shown to undergo 100% regioselective cyclization in reactions with alkyl and aryl azides to form 4-acyl-5-trifluoromethyl-1,2,3-triazoles. The reaction represents a general method for the synthesis of otherwise difficulty available 4-acyl-5trifluoromethyl-1,2,3-triazoles. The directing role of the trifluoromethyl group is discussed in the light of stepwise and concerted mechanisms for this reaction. (C) 2011 Elsevier Ltd. All rights reserved,