Synthesis of C3-Methyl-Substituted Pyrroloindolines and Furoindolines via Cascade Dearomatization of Indole Derivatives with Methyl Iodide
作者:Ji-Cheng Yi、Chuan Liu、Li-Xin Dai、Shu-Li You
DOI:10.1002/asia.201701151
日期:2017.12.5
A highly efficient method for constructing C3‐methyl‐substituted pyrroloindolines and furoindolines via cascade dearomatization reaction of indole derivatives with methyl iodide was developed. This protocol offers a direct approach to a wide range of C3 methyl substituted pyrroloindolines under mild conditions. The utility of this method was further demonstrated in the concise synthesis of (±)‐esermethol
Chiral Anion Phase Transfer of Aryldiazonium Cations: An Enantioselective Synthesis of C3-Diazenated Pyrroloindolines
作者:Hosea M. Nelson、Solomon H. Reisberg、Hunter P. Shunatona、Jigar S. Patel、F. Dean Toste
DOI:10.1002/anie.201310905
日期:2014.5.26
Herein is reported the first asymmetric utilization of aryldiazoniumcations as a source of electrophilic nitrogen. This is achieved through a chiralanionphase‐transfer pyrroloindolinization reaction that forms C3‐diazenated pyrroloindolines from simple tryptamines and aryldiazonium tetrafluoroborates. The title compounds are obtained in up to 99 % yield and 96 % ee. The air‐ and water‐tolerant reaction