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
作者:KNIGHT D. W.
DOI:——
日期:——
The generation and chemistry of dianions derived from furancarboxylic acids
作者:David W. Knight、Andrew P. Nott
DOI:10.1039/p19810001125
日期:——
2-lithiofuran-3-carboxylate (21) from furan-2-and furan-3-carboxylic acids respectively are described. The reactions of (5) and (21) with a range of electrophiles have been examined; in general these are very efficient with aldehydes and ketones but not as satisfactory with alkyl halides and epoxides. The dianions do not couple with allylic or benzylichalides, nor with nitriles or orthoesters. The generation of