Rhodium-Catalyzed Asymmetric Hydroboration/Cyclization of 1,6-Enynes Enabled by Spirosiladiphosphine Ligands: Constructing Chiral Five-Membered Rings with a Boron Handle
作者:Fei Hou、Yingtang Ning、Lili Song、Zequn Tan、Jiawen Yang、Zhigang Liu、Fen-Er Chen
DOI:10.1021/acs.orglett.3c02979
日期:2023.11.3
A rhodium-catalyzed enantioselective hydroboration/cyclization reaction of 1,6-enynes is achieved by employing a spirosiladiphosphine ligand. The process allows the synthesis of five-membered hetero- and carbocycles bearing a boron handle with high levels of activity and selectivity. Various enynes and organoboranes (HBdan, HBpin, HBmp, and HBamm) have been accommodated, and enynes containing terminal
通过使用螺硅二膦配体,实现了铑催化的 1,6-烯炔的对映选择性硼氢化/环化反应。该工艺可以合成具有高活性和选择性的带有硼柄的五元杂环和碳环。已适应各种烯炔和有机硼烷(HBdan、HBpin、HBmp 和 HBamm),并且首次将含有末端炔烃的烯炔集成到该工艺中。转化的高产率和选择性凸显了这些新型螺硅二膦配体的合成效用。