Rhodium(III)-Catalyzed Regioselective C(sp<sup>2</sup>)–H Functionalization of 7-Arylpyrazolo[1,5-<i>a</i>]pyrimidines with Dioxazolones as Amidating Agents
作者:Thirupathi Gogula、Jin-Quan Zhang、Hong-Bin Zou
DOI:10.1021/acs.orglett.9b02059
日期:2019.8.2
Rh(III)-catalyzed C–H functionalization of 7-arylpyrazolo[1,5-a]pyrimidines was developed wherein the pyrazolo[1,5-a]pyrimidine moiety is reported for the first time to direct the C–H bond activation. Various 7-arylpyrazolo[1,5-a]pyrimidines underwent smooth C–H amidation with alkyl-, aryl-, and heteroaryl-substituted dioxazolones to afford the products in moderate to good yields. Mechanistic studies
开发了Rh(III)催化的7-芳基吡唑并[1,5 - a ]嘧啶的CHH功能化,其中首次报道了吡唑并[1,5- a ]嘧啶部分指导CH键的活化。各种7-芳基吡唑并[1,5- a ]嘧啶经烷基,芳基和杂芳基取代的二恶唑酮进行平滑的CHH酰胺化反应,以中等至良好的收率得到产物。机理研究表明,涉及N1的六元Rhodacycle中间体可能在区域选择性催化循环中起关键作用。