Direct regioselective Csp2–H trifluoromethylation of pyrimidinones and pyridinones
作者:Pei-Zhi Zhang、Cheng-Kun Li、Guo-Yu Zhang、Ling Zhang、Yao-Jia Jiang、Jian-Ping Zou
DOI:10.1016/j.tet.2016.04.048
日期:2016.6
pyrimidinones and 3-trifluoromethyl pyridinones in moderate to good yields was described. The reaction showed that the steric hindrance due to bulky groups adjacent to the position of attack by the trifluoromethylradical had important influence on the yield.
描述了使用CF 3 SO 2 Na / Mn(OAc)3进行嘧啶酮和吡啶酮的直接区域选择性C sp2- H三氟甲基化,以中等至良好的产率提供了5-三氟甲基嘧啶酮和3-三氟甲基吡啶酮。该反应表明,由于三氟甲基自由基的进攻位置附近的庞大基团而引起的位阻对产率有重要影响。
Metal-free radical C–H methylation of pyrimidinones and pyridinones with dicumyl peroxide
A new method for free radical methylation of pyrimidinones and pyridinones with dicumylperoxide (DCP) under metal-free condition is introduced. A 50 g-scale reaction could be performed safely at desired...
A simple and convenient one-pot procedure for the synthesis of 5- and 6-substituted 2-phenyl-3 H-pyrimidin-4-ones by the condensation of 4-alkoxy-1,1,1-trichloroalk-3-en-2-ones with benz-amidine hydrochloride is described.