Syntheses of 4-, 5-, 6-, and 7-substituted tryptamine derivatives and the use of a bromine atom as a protecting group
作者:Olivier René、Benjamin P. Fauber
DOI:10.1016/j.tetlet.2013.12.025
日期:2014.1
Orthogonal syntheses of 4-, 5-, 6-, and 7-chloro substituted tryptamine derivatives were performed under the Grandberg–Zuyanova-modified Fisher indole-synthesis conditions. In the 4- and 6-substituted tryptamine cases, a bromine atom was utilized as an easily cleavable protecting group, which allowed complete regiocontrol. In addition, a chlorine substituent was preserved in the debromination step
在Grandberg–Zuyanova修饰的Fisher吲哚合成条件下,完成了4-,5-,6-和7-氯取代的色胺的正交合成。在4-和6-取代的色胺中,使用溴原子作为易于裂解的保护基,从而可以完全控制区域。此外,氯取代基在脱溴步骤中得以保留,可以用作现代Pd(0)催化条件下后期多样化的合成方法。