On the Reaction of Isatin with Cyanomethylene(triphenyl)-phosphorane. A Nucleophilic Attack of Alkyl Phosphites on the Carbon–Carbon Double Bond of (E)-Oxindolylideneacetonitrile
作者:Fayez H Osman、Fatma A El-Samahy
DOI:10.1016/s0040-4020(99)01065-0
日期:2000.3
The reaction of cyanomethylene(triphenyl)phosphorane (2) with isatin (1) in dry benzene at room temperature for 1 h led to the formation of (1,2-dihydro-2-oxo-3H-indol-3-yl)acetonitrile as a mixture of E- and Z-stereo isomers 3 and 4. Trialkyl phosphites 7 reacted with (E)-nitrile 3 in dry benzene at 70°C for about 10 h to give the phosphonates 8 as two isomers together with the unexpected spiro products
氰基亚甲基(三苯基)膦(2)与靛红(1)在干燥的苯中于室温反应1 h,导致形成(1,2-二氢-2-氧代-3氧-吲哚-3-基)乙腈作为E-和Z-立体异构体3和4的混合物。亚磷酸三烷基酯7在干燥的苯中与(E)-腈3在70°C下反应约10小时,得到膦酸酯8,为两个异构体以及异构体9的意料之外的螺环产物。(E)-腈3与亚磷酸二烷基酯反应时(11)在没有溶剂的情况下在100°C下约30小时,获得了膦酸酯衍生物8和二聚体结构9的一种异构体的混合物。考虑了反应机理,新化合物的结构分配基于化学和光谱学证据。