Catalyst-Free One-Pot Tandem Reduction of Oxo and Ene/Yne Functionalities by Hydrazine: Synthesis of Substituted Oxindoles from Isatins
作者:Mukund Jha、Ganesh M. Shelke、Anil Kumar
DOI:10.1002/ejoc.201402038
日期:2014.6
An unprecedented one-pottandemreduction of oxo and ene/ynefunctionalities of substitutedisatins is disclosed for the synthesis of oxindole derivatives in excellent yields. The reaction is simply performed by treating N-(2-alkenyl)/propargylisatins with an excess amount of hydrazine hydrate (25 %) under catalyst-free refluxing conditions. The reduction process appears to be quite unique and proceeds