Synthesis of Trifluoromethyl-Containing Polysubstituted Aromatic Compounds by Diels-Alder Reaction of Ethyl 3-Benzamido-2-oxo-6-(trifluoromethyl)-2<i>H</i>-pyran-5-carboxylate
作者:Ivan S. Kondratov、Nataliya A. Tolmachova、Violetta G. Dolovanyuk、Igor I. Gerus、Constantin-Gabriel Daniliuc、Günter Haufe
DOI:10.1002/ejoc.201500032
日期:2015.4
Diels–Alder reactions of ethyl 3-benzamido-2-oxo-6-(trifluoromethyl)-2H-pyran-5-carboxylate (1a) with electronically different dienophiles, including cyclic enol ethers, cycloalkenes, α,β-unsaturated ketones, and terminal acetylenes, are useful for the efficient and selective three-step preparation of trifluoromethyl-containing aromaticcompounds such as 3-aminobenzoic acid derivatives. We presume