An Efficient and Green Method for the Synthesis of Oxindole Derivatives in Water
作者:G. Srihari、M. Marthanda Murthy
DOI:10.1246/cl.2008.268
日期:2008.3.5
An environmentally benign method for the synthesis of 3,3-di(3-indolyl)- and 3,3-di(2-pyrrolyl)oxindoles by using various isatins, indoles, and pyrrole in water in excellent yields and high regiose...
Graphene oxide-catalysed carbene-transfer reaction in water: a highly “green” and selective approach to access 3,3′,3′′-trisindoles
作者:Priya Kamboj、Vikas Tyagi
DOI:10.1039/d3gc03966h
日期:——
using 3-diazo oxindole as a carbene precursor reacting with indoles to furnish biologically important 3,3′,3′′-trisindoles. The generality and robustness of the developed protocol was shown by employing different types of substitutions at the 3-diazo oxindole and indole which, in turn, provided 3,3′,3′′-trisindoles derivatives in good-to-excellent yield (61–91%). We revealed the utility of the developed
AbstractUnder the catalysis of only 3 mol% of Br2 at room temperature, indoles reacted
rapidly with isatins to form biologically important 3,3‐bis(indole‐3‐yl)indoline‐2‐(1H)‐ones with high efficiency and
wide substrate scope. Moreover, we demonstrated that p‐toluenesulfonic acid (TsOH) could serve as a surrogate to
catalyze this transformation.