單齒亞磷醯胺鈀配合物催化的烯烴不對稱馬氏氫氨羰基化反應
作者:
小柯機器人發布時間:2020/12/31 22:53:15
中國西北大學關正輝研究小組近日取得一項新成果。經過不懈努力,他們開發出鈀催化的烯烴不對稱馬氏氫氨羰基化反應。2020年12月29日,國際知名學術期刊《美國化學會志》發表了這一成果。
研究人員開發了一種發生在烯烴和苯胺間的鈀催化不對稱馬氏氫氨羰基化反應,該反應可以原子經濟性的合成含α手性中心的2-取代丙醯胺。他們發現,一種新的亞磷醯胺配體L16在反應中展示出高活性和選擇性。
該不對稱馬氏氫氨羰基化反應使用了易獲得的反應原料並適用於一系列不同的官能團,從而為溫和條件下區域/手性選擇性合成2-取代丙醯胺提供了一條便捷簡單的路線。進一步機理研究表明,該反應是通過一個鈀氫化路線進行的。
附:英文原文
Title: Asymmetric Markovnikov Hydroaminocarbonylation of Alkenes Enabled by Palladium-Monodentate Phosphoramidite Catalysis
Author: Ya-Hong Yao, Hui-Yi Yang, Ming Chen, Fei Wu, Xing-Xing Xu, Zheng-Hui Guan
Issue&Volume: December 29, 2020
Abstract: A palladium-catalyzed asymmetric Markovnikov hydroaminocarbonylation of alkenes with anilines has been developed for the atom-economical synthesis of 2-substituted propanamides bearing an α-stereocenter. A novel phosphoramidite ligand L16 was discovered which exhibited very high reactivity and selectivity in the reaction. This asymmetric Markovnikov hydroaminocarbonylation employs readily available starting materials and tolerates a wide range of functional groups, thus providing a facile and straightforward method for the regio- and enantioselective synthesis of 2-substituted propanamides under ambient conditions. Mechanistic studies revealed that the reaction proceeds through a palladium hydride pathway.
DOI: 10.1021/jacs.0c11249
Source: https://pubs.acs.org/doi/10.1021/jacs.0c11249