Herein, we developed a Ru(II)(BPGA) complex that could be used to catalyze chemo- and site-selective C-H oxidation. The described ruthenium complex was designed by replacing one pyridyl group on tris(2-pyridylmethyl)amine with an electron-donating amide ligand that was critical for promoting this type of reaction. More importantly, higher reactivities and better chemo-, and site-selectivities were
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
Organocatalytic, Dioxirane-Mediated C–H Hydroxylation under Mild Conditions Using Oxone
作者:William G. Shuler、Shea L. Johnson、Michael K. Hilinski
DOI:10.1021/acs.orglett.7b02178
日期:2017.9.15
method has been an elusive goal. A trifluoromethyl ketone catalyst in combination with Oxone is shown to enable the first dioxirane-mediated catalytic hydroxylations that approximate the reactivity and selectivity of isolated dioxiranes. The mild reaction conditions allow for selective 3° hydroxylation and 2° oxidation and are tolerant of acid-sensitive functionality and electron-neutral arenes.