Synthesis and properties of 2-trifluoromethyl-substituted 4-pentenoic and 3,4-pentadienoic acids and their esters
摘要:
The hydrolysis of the acid fluorides of 2-fluorocarbonyl(methoxycarbonyl)-2-trifluoromethyl-4-pentenoic acids (I) and (II), and of 2-fluorocarbonyl-(methoxycarbonyl)-2-trifluoromethyl-3,4-pentadienoic acids (III) and (IV) gave, under mild conditions, 2-trifluoromethyl-4-pentenoic acid (V) and 2-trifluoromethyl-3,4-pentadienoic acid (VII) or their methyl esters (VI) and (VIII). The reactivity of these compounds was studied.
A new approach to the synthesis of trifluoromethylated products of the [3,3]-sigmatropic rearrangement
作者:V. G. Andreev
DOI:10.1007/bf00698247
日期:1994.7
CH-acids of general formula CF3CH(X)CF3 (X = CF3, CO2R) react with 2,3-unsaturated alcohols in the presence of bases to give trifluoromethylated products of the [3,3]-sigmatropic rearrangement. These reactions provide a convenient method for the synthesis of 2-alkenyl-2-trifluoromethylmalonates.