Formation of spiro[indene-2,3′-pyrazole] derivatives from hydrazonyl chlorides and ninhydrin-malononitrile adduct
作者:Issa Yavari、Manijeh Nematpour、Esmat Sodagar
DOI:10.1007/s00706-015-1495-7
日期:2015.12
AbstractAn efficient synthesis of spiro[indene-2,3′-pyrazole] derivatives via a three-component reaction between ninhydrin, malononitrile, and hydrazonyl chlorides in EtOH at room temperature is described. Graphical abstract
A novel ligand‐free synthesis of alkynylhydrazones via coupling reaction of hydrazonylchlorides and terminal alkynes, catalyzed by CuI led to excellent yields.
Investigation into the Regiochemistry of Some Pyrazoles Derived from 1,3-Dipolar Cycloaddition of Methyl Methacrylate with Some Nitrilimines: A Combined Theoretical and Experimental Study
methacrylate as dipolarophile and some nitrilimines which were generated in situ afforded the new pyrazoles. The regiochemistry and reactivity of these reactions has been investigated on the basis of density functional theory (DFT)‐based reactivity indexes and activation energy calculations. The theoretical 13C NMRchemicalshifts of the cycloadducts which were obtained by GIAO method were comparable with
甲基丙烯酸甲酯作为双极性亲和剂与一些原位产生的腈亚胺之间的1,3-偶极环加成反应提供了新的吡唑。在基于密度泛函理论(DFT)的反应指数和活化能计算的基础上,研究了这些反应的区域化学和反应性。通过GIAO方法获得的环加合物的理论13 C NMR化学位移与观察值相当。