5‐(Cyano)dibenzothiophenium Triflate: A Sulfur‐Based Reagent for Electrophilic Cyanation and Cyanocyclizations
作者:Xiangdong Li、Christopher Golz、Manuel Alcarazo
DOI:10.1002/anie.201904557
日期:2019.7.8
and its reactivity as electrophilic cyanation reagent evaluated. The scalable preparation, easy handling and broad substrate scope of the electrophilic cyanation promoted by 9, which includes amines, thiols, silyl enol ethers, alkenes, electron rich (hetero)arenes and polyaromatic hydrocarbons, illustrate the synthetic potential of this reagent. Importantly, Lewis acid activation of the reagent is not
A one-pot three-component reaction for the preparation of highly functionalized tryptamines
作者:Se Jeong Yeo、Yongxiang Liu、Xiang Wang
DOI:10.1016/j.tet.2011.11.032
日期:2012.1
We have developed a general one-pot method to provide highly functionalized tryptamine derivatives, via a Fischer indole type pathway. In this article, we demonstrate optimal conditions for a one-pot indole synthesis, allowing for the synthesis of a broad scope of 2-methyl tryptamine derivatives and a precursor for the synthesis of the core structure of some akuammiline alkaloids. Additionally, further modification of the indole products is described. Published by Elsevier Ltd.