This paper describes the synthesis of a new N-THP protected 5-(1H)-imidazolyl boronic acid pinacol ester and its use in Suzuki cross-coupling reactions with a wide range of (het)aryl halides to provide 4(5)-(het)aryl-1H-imidazoles. (C) 2008 Elsevier Ltd. All rights reserved.
Lithiation and Alkylation of the Imidazole Backbone
作者:Frida Johanne Lundevall、Hans‐René Bjørsvik
DOI:10.1002/ejoc.202201504
日期:2023.5.12
A method for the alkylation of the imidazole backbone has been developed. Imidazole was protected with tetrahydro-2H-pyran-2-yl and chloro groups, respectively. The backbone (position 5) of imidazole was then lithiated and alkylated with haloalkanes, aldehydes, and ketones. The protective groups were removed by treatment with acid and base and hydrogenation. The method proved good functional group