Formation of <i>N</i>-Alkoxyindole Framework: Intramolecular Heterocyclization of 3-Alkoxyimino-2-arylalkylnitriles Mediated by Ferric Chloride
作者:Yunfei Du、Junbiao Chang、John Reiner、Kang Zhao
DOI:10.1021/jo7024477
日期:2008.3.1
[GRAPHICS]A variety of functionalized N-alkoxyindole-3-carbonitrile derivatives are achieved under remarkably mild conditions by applying a FeCl3-mediated intramolecular heterocyclization of 3-alkoxyimino-2-arylalkylnitliles. This novel synthesis allows the N-moiety on the side chain to be annulated to the benzene ring as the final synthetic step, which enables the functionalization of the benzenoid portion of the indole at an early stage of the synthesis.
Iodobenzene Dichloride/Zinc Chloride-Mediated Synthesis of <i>N</i>
-Alkoxyindole-3-carbonitriles from 3-Alkoxyimino-2-arylalkylnitriles via Intramolecular Heterocyclization
作者:Zhongxiang Yun、Ran Cheng、Jiyun Sun、Daisy Zhang-Negrerie、Yunfei Du
DOI:10.1002/adsc.201701111
日期:2018.1.17
heterocyclization of the readily available 3‐alkoxyimino‐2‐arylalkylnitriles mediated by iodobenzene dichloride/zinc chloride. The mechanism of the reaction proposes the formation of a key intermediate of nitrenium cation from a chlorination and dechlorination process facilitated by the hypervalent iodine reagent and Lewis acid respectively.