The Birchreduction of 2-(1-alkoxyalkyl)furan-3-carboxylic acids 1a-f gave 2-alkyl-3-furancarboxylic acids 2a-f with loss of the alkoxyl group in excellent isolated yields.
An improved synthesis of 2-substituted-3-furoic acids leading to an intramolecular Diels–Alder reaction between a dienophile and furan diene both containing an electron withdrawing group
作者:Shuyuan Yu、Giovanna Beese、Brian A. Keay
DOI:10.1039/p19920002729
日期:——
An improved preparation of various 2-substituted-3-furoic acids by lithiation of 2-methyl-3-furoic acid with 2.0 equiv. of butyllithium, and a successful intramolecular Diels-Alder reaction using 0.1 equiv. of methylaluminium dichloride between a dienophile and furan diene, which are both substituted with an electron withdrawing moiety, are described.
KNIGHT D. W.; NOTT A. P., J. CHEM. SOC. PERKIN TRANS., PART 1, 1981, NO 4, 1125-1131
作者:KNIGHT D. W.、 NOTT A. P.
DOI:——
日期:——
KNIGHT D. W., TETRAHEDRON LETT., 1979, NO 5, 469-472