A highly tunable radical-mediated reaction system for the functionalization of tertiary aliphatic C–Hbonds was developed. Reactions of various substrates with the Zhdankin azidoiodane reagent 1, Ru(bpy)3Cl2, and visible light irradiation at room temperature gave C–H azidated or halogenated products in an easily controllable fashion. These reactions are efficient, selective, and compatible with complex
A unified photoredox-catalysis strategy for C(sp<sup>3</sup>)–H hydroxylation and amidation using hypervalent iodine
作者:Guo-Xing Li、Cristian A. Morales-Rivera、Fang Gao、Yaxin Wang、Gang He、Peng Liu、Gong Chen
DOI:10.1039/c7sc02773g
日期:——
unified photoredox-catalysis strategy for both hydroxylation and amidation of tertiary and benzylic C-H bonds. Use of hydroxyl perfluorobenziodoxole (PFBl-OH) oxidant is critical for efficient tertiary C-H functionalization, likely due to the enhanced electrophilicity of the benziodoxole radical. Benzylic methylene C-H bonds can be hydroxylated or amidated using unmodified hydroxyl benziodoxole oxidant Bl-OH
Ruthenium-Catalyzed C–H Hydroxylation in Aqueous Acid Enables Selective Functionalization of Amine Derivatives
作者:James B. C. Mack、John D. Gipson、J. Du Bois、Matthew S. Sigman
DOI:10.1021/jacs.7b05469
日期:2017.7.19
catalytic protocol for sp3 C-H hydroxylation is described. Reactions are performed in aqueous acid using a bis(bipyridine)Ru catalyst to enable oxidation of substrates possessing basic amine functional groups. Tertiary and benzylic C-H hydroxylation is strongly favored over N-oxidation for numerous amine derivatives. With terpene-derived substrates, similar trends in reactivity toward tertiary and benzylic
Correction to “Ruthenium-Catalyzed C–H Hydroxylation in Aqueous Acid Enables Selective Functionalization of Amine Derivatives”
作者:James B. C. Mack、John D. Gipson、J. Du Bois、Matthew S. Sigman
DOI:10.1021/jacs.1c00564
日期:2021.2.24
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页面9504.产品的结构3CC在表2中被发现是错误分配。我们感谢Phil Baran教授和Rafael Navratil博士提请我们注意此错误。正确的结构在类固醇的C-9位置(3cc',如下所示)包含额外的苯甲醇。随着分子量的变化,分离的产率为29%。支持信息。错误的结构和产量也出现在SI中的S20和S84页上。因此,第S20页上的HRMS条目应如下所示:“ C 19 H 18 F 3 O 5 S +(M–O + Na)+的HRMS(ESI-TOF)m / z415.0822,发现为415.0857”。此处提供了完整的校正后的SI。可从https://pubs.acs.org/doi/10.1021/jacs.1c00564免费获得支持信息。 实验细节(已更正)(PDF)实验详细信息(已更正)(PDF)无需订阅ACS Web Edition,即可获得大多数电子支持信息文件。此类文件可以按文
Visible-Light-Promoted Activation of Unactivated C(sp<sup>3</sup>)–H Bonds and Their Selective Trifluoromethylthiolation
catalysis for the selective activation of otherwise unactivatedC(sp3)-H bonds, followed by their trifluoromethylthiolation, which has high potential as a late-stage functionalization tool. The generality of this method is exhibited through incorporation of the trifluoromethylthio group in a large number of C(sp3)-H bonds with high selectivity without the need for an excess of valuable substrate.