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Jia SM, Huang YH, Wang ZL, Fan FX, Fan BH, Sun HX, Wang H, Wang F. Hydroamination of Unactivated Alkenes with Aliphatic Azides. J Am Chem Soc 2022; 144:16316-16324. [PMID: 36047787 DOI: 10.1021/jacs.2c07643] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report here an efficient and highly diastereoselective intermolecular anti-Markovnikov hydroamination of unactivated alkenes with aliphatic azides in the presence of silane. The system tolerates a wide range of azides and alkenes and operates with alkene as limiting reagent. Mechanistic studies suggest a radical chain pathway that involves aminium radical formation, radical addition to alkenes and HAT from silane to β-aminium alkyl radical. The use of sterically bulky silane is proposed to contribute to the excellent diastereoselectivity for HAT. Computational analysis uncovers the reaction pathway of aliphatic azide activation with silyl radical for aminyl radical formation.
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Affiliation(s)
- Si-Ming Jia
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yi-Hang Huang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhan-Lin Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fang-Xu Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Bo-Han Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hao-Xiang Sun
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hao Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fei Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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2
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Heteroatom-Centred Radicals for the Synthesis of Heterocyclic Compounds. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2018_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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3
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Eum H, Choi J, Cho CG, Ha HJ. Regiochemistry-Directed Syntheses of Polyhydroxylated Alkaloids from Chiral Aziridines. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500285] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Heesung Eum
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
- R&SD Strategy Center; Industry-University Cooperation Foundation; Hanyang University; Ansan 426-791 Republic of Korea
| | - Jihye Choi
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
| | - Cheon-Gyu Cho
- Department of Chemistry; Hanyang University; Seoul 04763 Republic of Korea
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
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4
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Li D, Yang T, Su H, Yu W. tert-Butyl Hydroperoxide and Tetrabutylammonium Iodide-Promoted Free Radical Cyclization of α-Imino-N-arylamides and α-Azido-N-arylamides. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500305] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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5
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Stockdill JL, Lopez AM, Ibrahim AA. Toward the ABCD Core of the Calyciphylline A-Type Daphniphyllum Alkaloids: Solvent non-Innocence in Neutral Aminyl Radical Cyclizations. Tetrahedron Lett 2015; 56:3503-3506. [PMID: 26028785 DOI: 10.1016/j.tetlet.2015.01.121] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The Daphniphyllum alkaloids remain an attractive target in the synthetic community because of their unique framework and promising biological activities. We have shown that the ABC core of the calyciphylline A-type alkaloids can be rapidly accessed via the tandem cyclization of a neutral aminyl radical with a polarized cyclic olefin. Deuterium labeling experiments and reactions omitting a tin hydride reagent suggest that the solvent is the major source of the terminating hydrogen atom in the cyclization cascade. Incorporation of an internal alkyne in the radical pathway was tolerated in the reaction, and it provided the necessary atoms to enable completion of the D ring of the calyciphylline A-type alkaloids.
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Affiliation(s)
- Jennifer L Stockdill
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Alberto M Lopez
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Ahmad A Ibrahim
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
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6
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Li D, Yang T, Su H, Yu W. Retracted:tert-Butyl Hydroperoxide and Tetrabutylammonium Iodide- Promoted Free Radical Cyclization of α-Azido-N-arylamides. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400420] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Ibrahim AA, Golonka AN, Lopez AM, Stockdill JL. Rapid access to the heterocyclic core of the calyciphylline A and daphnicyclidin A-type Daphniphyllum alkaloids via tandem cyclization of a neutral aminyl radical. Org Lett 2014; 16:1072-5. [PMID: 24506430 PMCID: PMC3954529 DOI: 10.1021/ol4034868] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
![]()
A streamlined approach to the tertiary
amine-containing core of
the calyciphylline A and daphnicyclidin A-type Daphniphyllum alkaloids is presented. A known carvone derivative is converted
into the core structure in only four synthetic operations, and it
is well poised for further elaboration. The key enabling methodology
is a radical cyclization cascade beginning with addition of a secondary,
neutral aminyl radical to the β-position of an enone, followed
by trapping with a pendant alkyne.
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Affiliation(s)
- Ahmad A Ibrahim
- Department of Chemistry, Wayne State University , 5101 Cass Avenue, Detroit, Michigan 48202, United States
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Wen MF, Lin BT, He CS, Wu JZ. Hydrogen-bonding network of N,N'-bis[2-(tert-butyldimethylsiloxy)ethyl]ethylenediammonium dichloride. Acta Crystallogr C 2013; 69:787-9. [PMID: 23832044 DOI: 10.1107/s0108270113015084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 05/31/2013] [Indexed: 11/10/2022] Open
Abstract
The title salt, C18H46N2O2Si2(2+)·2Cl(-), has been synthesized by reaction of N,N'-bis(2-hydroxyethyl)ethylenediamine with tert-butyldimethylsilyl chloride. The zigzag backbone dication is located across an inversion centre and the two chloride anions are related by inversion symmetry. The ionic components form a supramolecular two-dimensional network via N-H···Cl hydrogen bonding, which is responsible for the high melting point compared with the oily compound N,N'-bis[2-(tert-butyldimethylsiloxy)ethyl]ethylenediamine.
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Affiliation(s)
- Mei-Feng Wen
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China
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Zhuang S, Liu K, Li C. Stereoselective 6-Exo Cyclization of Amidyl Radicals. An Experimental and Theoretical Study. J Org Chem 2011; 76:8100-6. [DOI: 10.1021/jo2014406] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shunjun Zhuang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Kun Liu
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecule, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Chaozhong Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907237] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010; 49:2178-81. [DOI: 10.1002/anie.200907237] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Zlotorzynska M, Zhai H, Sammis GM. Unique Diastereoselectivity Trends in Aminyl Radical Cyclizations onto Silyl Enol Ethers. J Org Chem 2009; 75:864-72. [DOI: 10.1021/jo902426z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maria Zlotorzynska
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Huimin Zhai
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Glenn M. Sammis
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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