Microwave-assisted synthesis of N-pyrazole ureas and the p38? inhibitor BIRB 796 for study into accelerated cell ageing
作者:Mark C. Bagley、Terence Davis、Matthew C. Dix、Caroline S. Widdowson、David Kipling
DOI:10.1039/b611493h
日期:——
Microwave irradiation of substituted hydrazines and β-ketoesters gives 5-aminopyrazoles in excellent yield, which can be transformed to the corresponding N-carbonyl derivatives by treatment with an isocyanate or chloroformate. Derivatization of 4-nitronaphth-1-ol using predominantly microwave heating methods and reaction with an N-pyrazole carbamate provides a rapid route to the N-pyrazole urea BIRB 796 in high purity, as a potent and selective inhibitor of p38α mitogen-activated protein kinase for the study of accelerated ageing in Werner syndrome cells.
用取代肼和β-酮酯进行微波辐射可以优异地合成5-氨基吡唑,随后通过与异氰酸酯或氯甲酸酯反应转化为相应的N-羰基衍生物。主要利用微波加热方法对4-硝基萘-1-醇进行衍生化,并与N-吡唑氨基甲酸酯反应,提供了一条快速合成高纯度N-吡唑尿素BIRB 796的途径,该化合物为p38α有丝分裂原激活蛋白激酶的强效选择性抑制剂,用于研究Werner综合征细胞中的加速老化。