Regio- and Enantioselective Synthesis of Chiral Pyrimidine Acyclic Nucleosides via Rhodium-Catalyzed Asymmetric Allylation of Pyrimidines
作者:Lei Liang、Ming-Sheng Xie、Tao Qin、Man Zhu、Gui-Rong Qu、Hai-Ming Guo
DOI:10.1021/acs.orglett.7b02482
日期:2017.10.6
A direct route to branched N-allylpyrimidine analogues is herein reported via the highly regio- and enantioselective asymmetric allylation of pyrimidines with racemic allylic carbonates. With [Rh(COD)Cl]2/chiral diphosphine as the catalyst, a range of chiral pyrimidine acyclic nucleosides could be obtained under neutral conditions in good yields (up to 95% yield) with high levels of regio- and enantioselectivities
本文报道了通过嘧啶与外消旋烯丙基碳酸酯的高度区域-和对映选择性不对称烯丙基化而形成支化N-烯丙基嘧啶类似物的直接途径。以[Rh(COD)Cl] 2 /手性二膦为催化剂,可以在中性条件下以良好的收率(高达95%的收率)获得一系列手性嘧啶无环核苷,并具有较高的区域和对映选择性(15: 1至> 40:1提单数据,最高ee达99%)。此外,已经通过不对称二羟基化成功地合成了带有两个相邻手性中心的手性嘧啶无环核苷。