Reaction of d-mannose arylhydrazones with dimethyl acetylenedicarboxylate: Synthesis of pentahydroxypentylpyrazoles
作者:Manuel Gómez Guillén、Luis M. Vázquez de Miguel、José Velázquez Jiménez
DOI:10.1016/s0008-6215(00)81889-3
日期:1982.10
Abstract The reactions of d -mannose arylhydrazones with dimethyl acetylenedicarboxylate under acidic conditions afforded the respective pentahydroxypentylpyrazoles. With the phenyl- and p-tolyl-hydrazones, the respective enehydrazones were also obtained. The new pyrazole derivatives gave penta-acetates and oxidation with sodium periodate gave pyrazole-3-carbaldehydes. The 1H-n.m.r. coupling constants
摘要d-甘露糖基芳hydr与乙酰二羧酸二甲酯在酸性条件下反应,得到了各自的五羟基戊基吡唑。用苯基和对甲苯基-,也得到了相应的烯hydr。新的吡唑衍生物得到五乙酸酯,用高碘酸钠氧化得到吡唑-3-甲醛。五乙酸盐的1H-nmr耦合常数表明,每个多元醇侧链均采用平面之字形构象。