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Cao M, Wang H, Hou F, Zhu Y, Liu Q, Tung CH, Liu L. Catalytic Enantioselective Hydroxylation of Tertiary Propargylic C(sp 3)-H Bonds in Acyclic Systems: a Kinetic Resolution Study. J Am Chem Soc 2024; 146:18396-18406. [PMID: 38936812 DOI: 10.1021/jacs.4c03610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Direct site-selective and enantioselective oxyfunctionalization of C(sp3)-H bonds to form alcohols with a general scope, with predictable selectivities, and in preparatively useful yields represents a paradigm shift in the standard logic of synthetic organic chemistry. However, the knowledge of either enzymatic or nonenzymatic asymmetric hydroxylation of tertiary C-H bonds for enantioenriched tertiary alcohol synthesis is sorely lacking. Here, we report a practical manganese-catalyzed enantio-differentiating hydroxylation of tertiary propargylic C-H bonds in acyclic systems, producing a wide range of structurally diverse enantioenriched tertiary propargyl alcohols in high efficiency with extremely efficient chemo- and enantio-discrimination. Other features include the use of C-H substrates as the limiting reagent, noteworthy functional group compatibility, great synthetic utilities, and scalability. The findings serve as a blueprint for the development of metal-catalyzed asymmetric oxidation of challenging substrates.
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Affiliation(s)
- Min Cao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, China
| | - Hongliang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, China
| | - Fangao Hou
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yuhang Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Qianqian Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Lei Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
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Mikhaliov A, Flerko A, Atroshchanka D, Harakhouski A, Budko A, Stasko K, Bialkevich A, Shepialevich S, Rusakovich Y, Hurski A. Visible-Light-Promoted Reduction of Epoxides, Hydroxysulfonates, and Halohydrines with Alkyltitanium Alkoxides. Org Lett 2024; 26:178-182. [PMID: 38148254 DOI: 10.1021/acs.orglett.3c03802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Alkyltitanium alkoxides generally serve as nucleophiles in reactions with carbonyl compounds and cross-coupling. Their application as reductants is known but remains underdeveloped. Here, we report that irradiation with visible light makes these organometallic compounds efficient reducing agents for the dehalogenation of 1,2- and 1,3-haloalcohols. This reaction was utilized for the reduction of epoxides and sulfonates, which proceeded through a sequence of the in situ halohydrin formation and photochemical dehalogenation. Ester, amide, nitrile, alkyne, and remote bromide groups were stable under the reaction conditions.
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Affiliation(s)
- Artyom Mikhaliov
- Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
| | - Aliaksei Flerko
- Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
| | - Dziyana Atroshchanka
- Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
| | - Aliaksei Harakhouski
- Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
| | - Arsenii Budko
- Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
| | - Kirill Stasko
- Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
| | - Andrei Bialkevich
- Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
| | - Siarhei Shepialevich
- Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
| | - Yahor Rusakovich
- Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
| | - Alaksiej Hurski
- Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
- Scientific Testing Center Campilab Ltd., Centraĺnaja 30A, Dynaraŭka 222202, Belarus
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