Highly enantioselective Rh-catalyzed asymmetric reductive dearomatization of multi-nitrogen polycyclic pyrazolo[1,5-<i>a</i>]pyrimidines
作者:Chaochao Xie、Guiying Xiao、Qianling Guo、Xiaoxue Wu、Guofu Zi、Wanjian Ding、Guohua Hou
DOI:10.1039/d3sc02086j
日期:——
A highly enantioselective rhodium-catalyzed reductive dearomatization of 7-substituted pyrazolo[1,5-a]pyrimidines has been realized for the first time by two strategies to afford chiral 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidines with excellent enantioselectivities of up to 98% ee. This method also provides an efficient approach for the synthesis of the powerful BTK inhibitor, zanubrutinib.
首次通过两种策略实现了7-取代吡唑并[1,5- a ]嘧啶的高度对映选择性铑催化还原脱芳构化,得到手性4,5,6,7-四氢吡唑并[1,5- a ]嘧啶类化合物具有优异的对映选择性,高达 98% ee。该方法还为强效BTK抑制剂zanubrutinib的合成提供了一种有效的方法。