Experimental and theoretical approaches to [1,5]-prototropic generation of an azomethine ylide and a 1,3-dipolar cycloaddition for novel spiropyrrolidine oxindoles synthesis
作者:Yaghoub Sarrafi、Mahshid Hamzehloueian、Kamal Alimohammadi、Saeid Yeganegi
DOI:10.1016/j.molstruc.2012.04.013
日期:2012.12
of spiropyrrolidine oxindoles was synthesized via a multicomponent 1,3-dipolar cycloaddition reaction of isatin, benzylamine and chalcone derivatives. The regio- and stereochemistry of the products were established by single crystal X-ray structure and spectroscopic techniques. The molecular mechanism of this cycloaddition has been investigated by means of a density functional theory (DFT) method. The
摘要 通过靛红、苄胺和查耳酮衍生物的多组分1,3-偶极环加成反应合成了一系列螺吡咯烷羟吲哚。产物的区域和立体化学是通过单晶 X 射线结构和光谱技术确定的。已经通过密度泛函理论 (DFT) 方法研究了这种环加成的分子机制。评估了通过亚胺离子中的 [1,5]-H 位移制备偶氮甲碱叶立德的能量路径。基于反应物的过渡态稳定性、全局和局部反应性指数来解释区域选择性和立体选择性。环加成被假定通过一步途径发生,其中两个 C-C 键以非同步方式形成。