Modular Synthesis of Di- and Trisubstituted Imidazoles from Ketones and Aldehydes: A Route to Kinase Inhibitors
作者:Ian de Toledo、Thiago A. Grigolo、James M. Bennett、Jonathan M. Elkins、Ronaldo A. Pilli
DOI:10.1021/acs.joc.9b01844
日期:2019.11.1
A one-pot and modular approach to the synthesis of 2,4(5)-disubstituted imidazoles was developed based on ketone oxidation, employing catalytic HBr and DMSO, followed by imidazole condensation with aldehydes. This methodology afforded twenty-nine disubstituted NH-imidazoles (23%-85% yield). A three-step synthesis of 20 kinase inhibitors was achieved by employing this oxidation-condensation protocol
基于酮氧化,采用催化HBr和DMSO,然后通过咪唑与醛的缩合反应,开发了一种单罐模块化方法,用于合成2,4(5)-二取代的咪唑。该方法提供了二十九个二取代的NH-咪唑(23%-85%的产率)。通过采用这种氧化-缩合方案,然后在咪唑环中进行溴化和Suzuki偶联,得到三取代的NH-咪唑(23%-69%,三步法),实现了三步合成20种激酶抑制剂的过程。该方法还用于合成已知抑制剂GSK3037619A。