Reaction of d-Galactose phenylhydrazone with nitroalkenes: Synthesis of pentahydroxypentylpyrazoles
作者:Manuel Gómez Guillén、Juan L. Conde Jiménez
DOI:10.1016/0008-6215(88)80058-2
日期:1988.9
Abstract d -Galactose phenylhydrazone reacts with 1- and 2-substituted and 1,2-di-substituted nitroalkenes, with loss of the nitro group, to give moderate yields of 3-( d -galacto-pentitol-1-yl)-1-phenylpyrazoles variously substituted at positions 4, 5, and 4,5, and a mechanism is proposed. Acetylation of these products affords penta-acetates and periodate oxidation gave the corresponding 1-phenyl
摘要d-半乳糖苯基hydr与1-和2-取代的和1,2-二取代的硝基烯烃反应,失去硝基,得到中等产率的3-(d-半乳糖-戊糖醇-1-基)-1 -苯基吡唑在4、5和4,5位上被不同取代,并提出了机理。这些产物的乙酰化得到五乙酸酯,高碘酸酯氧化得到相应的1-苯基吡唑-3-甲醛衍生物,其中一些被氧化成羧酸。Uv,ir和nmr数据证实了所提出的结构。