已经开发了一种新颖的一锅法,该方法可以从靛红,丙二腈,肼衍生物和四价胺的四组分反应合成各种螺[吲哚啉-3,4'-吡喃并[2,3- c ]吡唑] -3'-羧酸酯衍生物。乙炔二羧酸二烷基酯。在此过程中,在一个罐中形成了两个C–C键,两个C–N键和一个C–O键。该方案的显着特征是简单且对环境无害的反应条件,易于分离的产物,适用于各种现成的起始原料和良好的收率。
Convenient synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] and spiro[acenaphthyl-3,4′-pyrano[2,3-c]pyrazoles] via four-component reaction
作者:Chao Wang、Yan-Hong Jiang、Chao-Guo Yan
DOI:10.1016/j.cclet.2015.05.018
日期:2015.7
cycanoacetate in ethanol in the presence of triethylamine afforded the polysubstituted spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivatives in satisfactory yields. Under similar conditions, the four-component reaction containing acenaphthenequinone also resulted in the spiro[acenaphthyl-3,4′-pyrano[2,3-c]pyrazole] in good yields.