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Li N, Gui Y, Chu M, You M, Qiu X, Liu H, Wang S, Deng M, Ji B. Cobalt-Catalyzed Deprotection of Allyl Carboxylic Esters Induced by Hydrogen Atom Transfer. Org Lett 2021; 23:8460-8464. [PMID: 34670095 DOI: 10.1021/acs.orglett.1c03185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A brief, efficient method has been developed for the removal of the allyl protecting group from allyl carboxylic esters using a Co(II)/TBHP/(Me2SiH)2O catalytic system. This facile strategy displays excellent chemoselectivity, functional group tolerance, and high yields. This transformation probably occurs through the hydrogen atom transfer process, and a Co(III)-six-membered cyclic intermediate is recommended.
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Affiliation(s)
- Nan Li
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Yizhen Gui
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Mengqi Chu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Mengdi You
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Xiaohan Qiu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Hejia Liu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Shiang Wang
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Meng Deng
- Luoyang Key Laboratory of Organic Functional Molecules, College of Food and Drug, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Baoming Ji
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
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Suzuki Y, Iwase S, Ratanasak M, Hasegawa JY, Tanaka S, Kitamura M. Mechanism of the Asymmetric Dehydrative Allylative Cyclization of Alcohols to Cyclic Ethers Catalyzed by a CpRu Complex of the Chiral Picolinic Acid-Type Ligand, Cl-Naph-PyCOOH: Is a π-Allyl Intermediate Present? BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Suzuki
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Shoutaro Iwase
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Manussada Ratanasak
- Institute for Catalysis, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Jun-ya Hasegawa
- Institute for Catalysis, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Shinji Tanaka
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
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Iwase S, Suzuki Y, Tanaka S, Kitamura M. CpRu/Brønsted Acid-Catalyzed Enantioselective Dehydrative Cyclization of Pyrroles N-Tethered with Allylic Alcohols. Org Lett 2020; 22:1929-1933. [PMID: 32069061 DOI: 10.1021/acs.orglett.0c00290] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A cationic CpRu/halogen/Brønsted acid hybrid catalyst (R cat) with the axially chiral Cl-Naph-PyCOOH ligand (naph = naphthyl, py = pyridine) is highly efficient for dehydrative cyclization of pyrroles to construct 1,2-fused-2-allylated pyrroles that, so far, have not been achieved. The mechanistic study has implied that hydrogen and halogen bonds play a key role for facilitating the R,SRu-catalyzed reaction pathway via a σ-allyl intermediate and that the diastereomeric R,RRu cat slowly gives the minor enantiomer via a π-allyl intermediate.
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Affiliation(s)
- Shoutaro Iwase
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Yusuke Suzuki
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Shinji Tanaka
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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Ogawa S, Miyata K, Kawakami S, Tanaka S, Kitamura M. CpRuII-chiral bisamidine complex catalyzed asymmetric Carroll-type decarboxylative allylation of β-keto allyl esters. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tanaka S, Ramachandran G, Hori Y, Kitamura M. Bisamidine–Cu(I)-catalyzed C-Allylation of 1,3-Dicarbonyl Compounds with Simple Cyclic Alkenes Using Di-tert-butyl Peroxide. CHEM LETT 2018. [DOI: 10.1246/cl.180741] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Shinji Tanaka
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Gunasekar Ramachandran
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Yohei Hori
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
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Nakane S, Yamamura T, Manna SK, Tanaka S, Kitamura M. Mechanistic Study of the Ru-Catalyzed Asymmetric Hydrogenation of Nonchelatable and Chelatable tert-Alkyl Ketones Using the Linear Tridentate sp 3P/sp 3NH/sp 2N-Combined Ligand PN(H)N: RuNH- and RuNK-Involved Dual Catalytic Cycle. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Satoshi Nakane
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Tomoya Yamamura
- Graduate School of Science and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Sudipta Kumar Manna
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Shinji Tanaka
- Graduate School of Science and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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Suzuki Y, Iwase S, Hashimoto K, Tanaka S, Kitamura M. π-Allyl Donicity Switch in Catalytic Asymmetric Allylation: Usability of a Robust and Feasible Allyl Methyl Ether. CHEM LETT 2017. [DOI: 10.1246/cl.170533] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yusuke Suzuki
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601
| | - Shoutaro Iwase
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601
| | - Kazuki Hashimoto
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601
| | - Shinji Tanaka
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8601
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Yamamura T, Nakane S, Nomura Y, Tanaka S, Kitamura M. Development of an axially chiral sp3P/sp3NH/sp2N-combined linear tridentate ligand—fac-selective formation of Ru(II) complexes and application to ketone hydrogenation. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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