Efficient synthesis of new biheterocyclic 1-(5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazol-1-yl)-3-(6-trifluoro methylpyrimidin-4-yl)-propan-1-ones
摘要:
Several new 1-(5-hydroxy-5-trifluoromethyl-1H-pyrazol-1-yl)-3-(6-trifluoromethyl pyrimidin-4-yl)-propan-1-ones were prepared by cyclocondensation between two different 3-[6-trifluoromethyl-2(substituted)pyrimidin-4-yl]propanoylhydrazides derived from levulinic acid and versatile 1,1,1-trifluoro-4-alkoxy-3-alken-2-ones. The structure of new propionyl-spaced bis trifluoromethylated biheterocycles was characterized based on H-1 and C-13 nuclear magnetic resonance spectroscopy and mass spectrometry data. (C) 2013 Elsevier B.V. All rights reserved.
A Straightforward and Efficient Synthesis of 3-(Pyrimidinyl)propanoates from Levulinic Acid
作者:Alex F. C. Flores、Juliana L. Malavolta、Alynne A. Souto、Rayane B. Goularte、Darlene C. Flores、Luciana A. Piovesan
DOI:10.5935/0103-5053.20130070
日期:——
pyrimidine-like derivatives as a new type of glutamate-like 3-(trihalomethylatedpyrimidinyl)propanoate is reported. Preparation of 3-(trihalomethylatedpyrimidinyl) propanohydrazides is also described. The synthetic potential of this straightforward protocol was established by the synthesis of fourteen new 3-(pyrimidinyl) propanoates in regular to good yields (38-92%). The structural assignments were based