Cu(I)/Chiral Bisoxazoline-Catalyzed Enantioselective Sommelet-Hauser Rearrangement of Sulfonium Ylides
Cu(I)/Chiral Bisoxazoline-Catalyzed Enantioselective Sommelet-Hauser Rearrangement of Sulfonium Ylides
复制标题
Cu(I)/手性双恶唑啉催化锍叶立德对映选择性 Sommelet-Hauser 重排
DOI:
10.1021/acs.joc.0c01590
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发表时间:
2020
影响因子:
3.6
通讯作者:
Jianbo Wang
中科院分区:
文献类型:
--
作者:
Shu-Sen Li;Jianbo Wang
Catalytic asymmetric thia-Sommelet–Hauser rearrangement of sulfonium ylides remains a great challenge due to its multistep reaction mechanism involving metal carbene formation, proton transfer, and [2,3]-sigmatropic rearrangement. In particular, the key problem of such reactions is the differentiation of the enantiotopic lone pair electrons of sulfur, which generates the sulfonium ylide intermediate bearing chirality on the sulfur atom. With a modified chiral bisoxazoline ligand, we developed a Cu(I)-catalyzed asymmetric thia-Sommelet–Hauser rearrangement with good to excellent enantioselectivities. Mechanistic studies provide insights into the details of the reaction mechanism.