The Suzuki–Miyaura Cross-Coupling Reaction of Halogenated Aminopyrazoles: Method Development, Scope, and Mechanism of Dehalogenation Side Reaction
作者:Lukáš Jedinák、Renáta Zátopková、Hana Zemánková、Alena Šustková、Petr Cankař
DOI:10.1021/acs.joc.6b02306
日期:2017.1.6
The efficient Suzuki–Miyaura cross-coupling reaction of halogenated aminopyrazoles and their amides or ureas with a range of aryl, heteroaryl, and styryl boronic acids or esters has been developed. The method allowed incorporation of problematic substrates: aminopyrazoles bearing protected or unprotected pyrazole NH, as well as the free amino or N-amide group. Direct comparison of the chloro, bromo
卤代氨基吡唑及其酰胺或脲与一系列芳基,杂芳基和苯乙烯基硼酸或酯的有效Suzuki-Miyaura交叉偶联反应已得到开发。该方法允许掺入有问题的底物:带有保护或未保护的吡唑NH以及自由氨基或N-酰胺基的氨基吡唑。在Suzuki-Miyaura反应中对氯,溴和碘吡唑的直接比较显示,由于降低了脱卤的倾向,Br和Cl衍生物优于碘吡唑。此外,揭示了影响不希望的脱卤副反应的机理和因素。