α-Amylase from hog pancreas displayed catalytic promiscuity in three-component reaction for the synthesis of 3,3′-disubstituted oxindoles and spirooxindole pyrans.
来自猪胰腺的α-淀粉酶在合成3,3'-二取代氧吲哚和螺环氧吲哚吡喃的三组分反应中表现出催化多面性。
Guanidine functionalized core–shell structured magnetic cobalt-ferrite: an efficient nanocatalyst for sonochemical synthesis of spirooxindoles in water
作者:Mahla Dadaei、Hossein Naeimi
DOI:10.1039/d1ra00967b
日期:——
modified by changing the ingredients or the ratio of core to the shell. In this research, a CoFe2O4@SiO2-guanidine nanocomposite was prepared and identified as an efficient catalyst for the one-pot synthesis of spirooxindole derivatives in water under ultrasonic irradiation conditions. The advantages of this method are in its simplicity, saving costs and energy, high yields, short reaction times, environmental
Abstract New three-component reaction was developed via one-pot strategy for the synthesis of functionalized 3,3′-disubstituted oxindoles and spirooxindole through the reaction among isatin, malononitrile, and acetone/indole/nitromethane/acetylacetone/dimedone in ethanol as solvent without base. It was observed that all the mixed ligand transition metal complexes with triphenylphosphine worked as the