inhibition of the undesired Glaser coupling side reaction. The substratescope is broad, covering (hetero)aryl-, alkynyl-, and aminocarbonyl-substituted alkenes, (hetero)aryl and alkyl as well as silyl alkynes, and tertiary to primary alkyl radical precursors with excellent functional group compatibility. Facile transformations of the obtained chiral alkynes have also been demonstrated, highlighting
Ag-Catalyzed Asymmetric Interrupted Barton–Zard Reaction Enabling the Enantioselective Dearomatization of 2- and 3-Nitroindoles
作者:Wei-Cheng Yuan、Xin-Meng Chen、Jian-Qiang Zhao、Yan-Ping Zhang、Zhen-Hua Wang、Yong You
DOI:10.1021/acs.orglett.1c04036
日期:2022.1.28
We disclose a Ag-catalyzed asymmetric interrupted Barton–Zard reaction of α-aryl-substituted isocyanoacetates with 2- and 3-nitroindoles, which enables the dearomatization of nitroindoles and hence offers rapid access to an array of optically active tetrahydropyrrolo[3,4-b]indole derivatives bearing three contiguous stereogenic centers, including two tetrasubstituted chiral carbon atoms with pretty
我们公开了 α-芳基取代的异氰基乙酸酯与 2-和 3-硝基吲哚的 Ag 催化不对称间断 Barton-Zard 反应,这使得硝基吲哚脱芳构化成为可能,因此可以快速获得一系列光学活性四氢吡咯并[3,4- b ]吲哚衍生物具有三个连续的立体中心,包括两个四取代的手性碳原子,具有很好的结果(高达 99% 的产率,91:9 dr 和 96% ee)。该协议的合成潜力通过产品的克级反应和多功能转化展示了出来。