The preparation of 5-indolyl-Mannich bases: an expedient source of 5-(chloromethyl)indoles
作者:Béla Pete
DOI:10.1016/j.tetlet.2008.02.125
日期:2008.4
5-(dialkylaminomethyl)indole-2-carboxylates were prepared by the Fischer indolization of 4-(dialkylaminomethyl)phenylhydrazones easily obtained from diazotized 4-(dialkylaminomethyl)anilines by the Japp–Klingemann reaction. These formal Mannich bases are valuable synthetic intermediates affording 5-(chloromethyl)indoles on reaction with acetyl chloride at rt within a few minutes in quantitative yields.