A Facile Synthesis of Some Spirooxoindole Derivatives via One-Pot Three-Component Reactions
作者:Ghada E. Badri、Fatma E.M. El-Baih、Hassan M. Al-Hazimi
DOI:10.14233/ajchem.2013.14270
日期:——
Tetrahydrospiro[chromene-4,3-indole]-2-ones (5a-c) and spiro[indole-3,4-pyrano(3,2-d)pyrazole]-2-ones (6a-b) have been synthesized based on the one-pot three-component cyclocondensation reaction of 5-(un)substituted isatins (1a-c) with ethyl cyanoacetate (2) and 5,5-dimethylcyclohexane-1,3-dione (3) or 5-methyl-2-phenyl-2,4-dihydro-pyrazol-3-one (4) in absolute ethanol containing a catalytic amount of Et3N carried out under both conventional heating and environmentally benign procedures. The structures of the resulting compounds were confirmed by spectral IR, 1H NMR, 13C NMR, 2D NMR [1H-1H COSY, 1H-13C COSY (HETCOR)] and electrospray ionization tandem mass [(±) ESI-MS/MS]} analysis.
合成了四氢螺[色烯-4,3-吲哚]-2-酮(5a-c)和螺[吲哚-3,4-吡喃(3,2-d)吡唑]-2-酮(6a-b)基于5-(未)取代靛红(1a-c)与氰基乙酸乙酯(2)和5,5-二甲基环己烷-1,3-二酮(3)或5-甲基-的一锅三组分环缩合反应2-苯基-2,4-二氢-吡唑-3-酮(4)在含有催化量的Et3N的无水乙醇中在常规加热和环境友好的程序下进行。所得化合物的结构通过光谱IR、1H NMR、13C NMR、2D NMR [1H-1H COSY、1H-13C COSY (HETCOR)]和电喷雾电离串联质量[(±) ESI-MS/MS]确认} 分析。