Mild Microwave-Assisted Synthesis of Dipyrromethanes and Their Analogues
作者:K. Borbas、Ruisheng Xiong
DOI:10.1055/s-0034-1378925
日期:——
The Mannich reaction between pyrroles or indoles and Eschenmoser's salt (dimethylmethylideneammonium iodide) forms N,N-dimethylamino-methylated derivatives in good to excellent yields. The reaction is highly regioselective, and for pyrroles both 2- and 3-substituted derivatives could be obtained. The N,N-dimethylaminomethylpyrroles and indoles underwent substitution with pyrrole under microwave irradiation, affording the appropriate dipyrromethanes, N-confused, and indolo-dipyrromethanes in moderate to excellent overall yield.
KATRITZKY, ALAN R.;LUE, PING;CHEN, YA-XIONG, J. ORG. CHEM., 55,(1990) N1, C. 3688-3691
作者:KATRITZKY, ALAN R.、LUE, PING、CHEN, YA-XIONG
DOI:——
日期:——
An alternative route to 2-substituted indoles via N-aminal-directed lithiation