An expeditious and environmentally benign methodology for the synthesis of substituted indoles from cyclic enol ethers and enol lactones
作者:Pankajkumar R. Singh、Mandar P. Surpur、Sachin B. Patil
DOI:10.1016/j.tetlet.2008.02.107
日期:2008.5
A simple and environmentally friendly method is developed for the synthesis of substituted indoles from commercially available aryl hydrazines and cyclic enolethers with Montmorillonite-K10 as a heterogeneous catalyst. The catalyst is non-toxic, inexpensive and recyclable and the process is clean, high yielding and operationally simple.
utility of indoles. In continuation of our research interest in green oxidative cyclization of indoles with Oxone-halide. Here we report an oxidative cyclization of hometryptamine and hometryptophol derivatives using KI/oxone, enabling efficiently access to spiro-heterocyclic oxindoles incorporating tetrahydrofurans, pyrrolidines, pyranones, furanones, and lactams would be difficult to prepare by other