1
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Li W, Shi S, Cao M, Gao W, Zhang X, Li W, Yu Y, Li T. Palladium(II)-Catalyzed Norbornene-Mediated Selective meta-C-H Silylation for the Synthesis of Arylsilanes from Primary Benzamides. Org Lett 2024; 26:5506-5510. [PMID: 38900141 DOI: 10.1021/acs.orglett.4c01841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
A palladium(II)-catalyzed norbornene-mediated remote selective meta-C-H silylation of primary benzamides was developed for the synthesis of arylsilanes. Such a conversion provides access to a range of arylsilanes with exclusive selectivity using norbornene (NBE) as the meta-C-H activator. The amide directing group can be detached simultaneously through C-C bond cleavage or undergo a dehydration reaction pathway to form nitriles.
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Affiliation(s)
- Wenguang Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Shukui Shi
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Man Cao
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Wenchao Gao
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Wentao Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Yongqi Yu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
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2
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Li W, Cao M, Zhang C, Shi S, Liu J, Li W, Zhang X, Yu Y, Li T. Palladium/NBE-Catalyzed Regioselective C-H Silylation: Access to Divergent Silicon-Containing Indoles. Org Lett 2024; 26:1143-1147. [PMID: 38299994 DOI: 10.1021/acs.orglett.3c04109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
A palladium/norbornene (NBE)-catalyzed regioselective C-H silylation of free NH-indoles is reported. This protocol uses Pd(OAc)2 as the catalyst and Cu(OAc)2 as the oxidant, and the reaction relies on the control of NBE as a switch. The reaction tolerates various functional groups, and a series of silicon-containing indoles were directly synthesized in 30%-94% yields.
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Affiliation(s)
- Wenguang Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Man Cao
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Chunyan Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Shukui Shi
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Juan Liu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Wentao Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Yongqi Yu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
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3
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Li W, Yu Y, Zhang X, Zhang C, Chen M, Li T. NBE-Controlled Palladium-Catalyzed Intermolecular Selective C-H Silylation of Boronic Acids. J Org Chem 2023; 88:14659-14669. [PMID: 37787482 DOI: 10.1021/acs.joc.3c01655] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
An efficient palladium-catalyzed intermolecular selective C-H silylation of boronic acids is described. The combination of palladium catalyst with copper oxidant enables ortho-selective C-H silylation by employing hexamethyldisilane as the trimethylsilyl source, which relies on the control of NBE derivatives as a switch, thus providing straightforward access to divergent organosilicon compounds.
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Affiliation(s)
- Wenguang Li
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
- State Key Laboratory of Motor Vehicle Biofuel Technology, Henan Tianguan Enterprise Group Company Limited, Nanyang, Henan 473000, China
| | - Yongqi Yu
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
| | - Xu Zhang
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
| | - Chunyan Zhang
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
| | - Ming Chen
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
| | - Ting Li
- Drug Synthesis Engineering Technology Research Center of Henan Province for Photoelectric Green Catalysis, Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, China
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4
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Abstract
The stereoselective total synthesis of structure 1 assigned to the macrolide natural product neaumycin B is reported in a 2.3% overall yield on 90 mg scale. The synthesis features a gram-scale nickel-catalyzed reductive cross-coupling/spiroketalization tactic to construct the spiroketal core of neaumycin B. The stereostructures of the C3-C6, C8-C14, and C20-C41 segments of synthetic neaumycin B were unambiguously verified by X-ray crystallography.
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Affiliation(s)
- Jiaming Ding
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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5
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Ye ZH, Gou FH, Wu Y, Li CY, Wang P. Diverse Synthesis of Alkenylsilanes via Pd-Catalyzed Alkenyl C-H Silylation. Org Lett 2023; 25:2145-2150. [PMID: 36921249 DOI: 10.1021/acs.orglett.3c00633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Here, we disclose a general approach for the diverse synthesis of alkenylsilanes in a highly efficient, stereoselective, and atom-economic manner by leveraging the palladium-catalyzed disilylation reaction of 2-bromostyrene derivatives with hexamethyldisilane, which is suitable for the preparation of a series of disubstituted, trisubstituted, and tetrasubstituted alkenylsilanes. Furthermore, the resulting tetrasubstituted alkenylsilanes could be readily transformed into the corresponding diarylated benzosiloles, which have been proven to be a potential AIE material and a fluorene material.
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Affiliation(s)
- Zi-Hang Ye
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou 310018, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Fei-Hu Gou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Yichen Wu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Chuan-Ying Li
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou 310018, P. R. China
| | - Peng Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China.,CAS Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, P. R. China
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6
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Zhu SF, He P, Hu MY, Zhang XY. Transition-Metal-Catalyzed Stereo- and Regioselective Hydrosilylation of Unsymmetrical Alkynes. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1605-9572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractAlkyne hydrosilylation is one of the most efficient methods for the synthesis of alkenyl silicon derivatives and has been a hot topic of research for decades. This short review summarizes the progress in transition-metal-catalyzed stereo- and regioselective hydrosilylation of unsymmetrical alkynes. Topics are discussed based on different types of alkynes and the selectivities.1 Introduction2 Terminal Alkyne Hydrosilylation2.1 β-E Selectivity2.2 β-Z Selectivity2.3 α-selectivity3 Internal Alkyne Hydrosilylation3.1 Aryl–Alkyl Acetylenes3.2 Alkyl–Alkyl Acetylenes3.3 Internal Alkynes with Polarized Substituents4 Summary and Outlook
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7
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Mata G, Kalnmals CA. Total Synthesis in the Trost Laboratories: Selected Milestones From the Past Twenty Years. Isr J Chem 2021. [DOI: 10.1002/ijch.202100022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guillaume Mata
- Arcus Biosciences, Inc. 3928 Point Eden Way Hayward CA 94545 USA
| | - Christopher A. Kalnmals
- Crop Protection Discovery Corteva Agriscience 9330 Zionsville Road Indianapolis IN 46268 USA
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8
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Tracy JS, Kalnmals CA, Toste FD. Beyond Allylic Alkylation: Applications of Trost Chemistry in Complex Molecule Synthesis. Isr J Chem 2021. [DOI: 10.1002/ijch.202000103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jacob S. Tracy
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
| | | | - F. Dean Toste
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
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9
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Fariña-Ramos M, García C, Martín VS, Álvarez-Méndez SJ. Synthetic efforts on the road to marine natural products bearing 4- O-2,3,4,6-tetrasubstituted THPs: an update. RSC Adv 2021; 11:5832-5858. [PMID: 35423108 PMCID: PMC8694735 DOI: 10.1039/d0ra10755g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 01/26/2021] [Indexed: 11/21/2022] Open
Abstract
Scientific literature is inundated with secondary metabolites from marine sources. In this ocean of natural products, the presence of recurring patterns has traditionally led scientists to unravel the biosynthetic mechanisms that naturally yield these products, as well as to imitate Nature to prepare them in the laboratory, especially when promising bioactivities and stimulating molecular architectures are involucrate. For instance, natural products containing multisubstituted oxygenated rings and macrocyclic lactones are recurrently selected as targets for developing total syntheses. Thus, in the last decades a noteworthy number of synthetic works regarding miyakolide, madeirolide A and representative compounds of polycavernosides, lasonolides and clavosolides have come to fruition. Up to now, these families of macrolides are the only marine natural products bearing a tetrasubstituted tetrahydropyran ring with carbon substituents at positions 2, 3 and 6, as well as an oxygen at position 4. Their splendid structures have received the attention of the synthetic community, up to the point of starring in dozens of articles, and even some reviews. This work covers all the synthetic studies towards miyakolide and madeirolide A, as well as the synthetic efforts performed after the previous specialised reviews about lasonolide A, polycavernoside A and clavosolides, published in 2006, 2007 and 2016, respectively. In total, this review summarises 22 articles in which these marine natural products with 4-O-2,3,4,6-tetrasubstituted tetrahydropyrans have the leading role.
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Affiliation(s)
- Marta Fariña-Ramos
- Departamento de Química Orgánica, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
- Instituto Universitario de Bio-Orgánica Antonio González, Síntesis Orgánica Sostenible, Unidad Asociada al CSIC, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
| | - Celina García
- Departamento de Química Orgánica, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
- Instituto Universitario de Bio-Orgánica Antonio González, Síntesis Orgánica Sostenible, Unidad Asociada al CSIC, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
| | - Víctor S Martín
- Departamento de Química Orgánica, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
- Instituto Universitario de Bio-Orgánica Antonio González, Síntesis Orgánica Sostenible, Unidad Asociada al CSIC, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
| | - Sergio J Álvarez-Méndez
- Departamento de Química Orgánica, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
- Instituto Universitario de Bio-Orgánica Antonio González, Síntesis Orgánica Sostenible, Unidad Asociada al CSIC, Universidad de La Laguna Avda Astrofísico Francisco Sánchez 38206 La Laguna Tenerife Spain
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10
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Ngamnithiporn A, Iwayama T, Bartberger MD, Stoltz BM. Enantioselective synthesis of highly oxygenated acyclic quaternary center-containing building blocks via palladium-catalyzed decarboxylative allylic alkylation of cyclic siloxyketones. Chem Sci 2020; 11:11068-11071. [PMID: 34123197 PMCID: PMC8162308 DOI: 10.1039/d0sc04383d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 09/10/2020] [Indexed: 11/30/2022] Open
Abstract
The development of a palladium-catalyzed enantioselective decarboxylative allylic alkylation of cyclic siloxyketones to produce enantioenriched silicon-tethered heterocycles is reported. The reaction proceeds smoothly to provide products bearing a quaternary stereocenter in excellent yields (up to 91% yield) with high levels of enantioselectivity (up to 94% ee). We further utilized the unique reactivity of the siloxy functionality to access chiral, highly oxygenated acyclic quaternary building blocks. In addition, we subsequently demonstrated the utility of these compounds through the synthesis of a lactone bearing vicinal quaternary-trisubstituted stereocenters.
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Affiliation(s)
- Aurapat Ngamnithiporn
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
| | - Toshihiko Iwayama
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
- Central Pharmaceutical Research Institute, Japan Tobacco Inc. 1-1, Murasaki-cho, Takatsuki Osaka 569-1125 Japan
| | | | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
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11
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Liu R, Wei Z, Wang J, Liu Y, Xue H. Highly selective hydrosilylation of equilibrating allylic azides. Chem Commun (Camb) 2020; 56:5038-5041. [PMID: 32242569 DOI: 10.1039/d0cc01316a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The Pt-catalyzed hydrosilylation of equilibrating allylic azides is reported. The reaction provides only one out of four possible hydrosilylation products in good yields and with very high chemoselectivity (alk-1-ene vs. alk-2-ene), regioselectivity (linear vs. branched), and excellent functional group tolerance.
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Affiliation(s)
- Ruzhang Liu
- College of Chemistry & Chemical Engineering, Yangzhou University, 180 Siwangting Rd., Yangzhou 225002, China.
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12
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Yoo WJ, Chen W, Nguyen TVQ, Kobayashi S. One-Pot Synthesis of α,β-Unsaturated γ-Lactones and Lactams via a Sequential trans-Hydroalumination and Catalytic Carboxylation of Propargyl Alcohols and Amines with Carbon Dioxide. Org Lett 2020; 22:2328-2332. [PMID: 32149518 DOI: 10.1021/acs.orglett.0c00513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A one-pot, sequential process that combines a trans-selective hydroalumination of propargyl alcohols and amines with a copper- or silver-catalyzed carboxylation reaction using carbon dioxide, followed by an acid-mediated intramolecular condensation step, led to the formation of a wide range of α,β-unsaturated γ-butyrolactones and lactams.
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Affiliation(s)
- Woo-Jin Yoo
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Wenlong Chen
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Thanh V Q Nguyen
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Kobayashi
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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13
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Urbitsch F, Elbert BL, Llaveria J, Streatfeild PE, Anderson EA. A Modular, Enantioselective Synthesis of Resolvins D3, E1, and Hybrids. Org Lett 2020; 22:1510-1515. [PMID: 32031820 PMCID: PMC7146891 DOI: 10.1021/acs.orglett.0c00089] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Indexed: 12/31/2022]
Abstract
Resolvins D3 and E1 are important signaling molecules in the resolution of inflammation. Here, we report a convergent and flexible strategy to prepare these natural products using Hiyama-Denmark coupling of five- and six-membered cyclic alkenylsiloxanes to connect three resolvin fragments, and control the stereochemistry of the natural product (Z)-alkenes. The modular nature of this approach enables the synthesis of novel resolvin hybrids, opening up opportunities for more-extensive investigations of resolvin biology.
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Affiliation(s)
- Felix Urbitsch
- Chemistry
Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Bryony L. Elbert
- Chemistry
Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Josep Llaveria
- UCB
Pharma, Ltd., 216 Bath
Road, Slough, SL1 3WE, United Kingdom
| | | | - Edward A. Anderson
- Chemistry
Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, United Kingdom
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14
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Gudmundsson HG, Kuper CJ, Cornut D, Urbitsch F, Elbert BL, Anderson EA. Synthesis of Cyclic Alkenyl Dimethylsiloxanes from Alkynyl Benzyldimethylsilanes and Application in Polyene Synthesis. J Org Chem 2019; 84:14868-14882. [PMID: 31646859 DOI: 10.1021/acs.joc.9b01664] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclic dimethylalkenylsiloxanes, useful motifs for (Z)-selective Hiyama cross-coupling, are accessed from alkynyl benzyldimethylsilanes featuring adjacent allylic or homoallylic oxygen substituents by semihydrogenation/debenzylation/cyclization. While formation of 5- and 6-membered rings can be achieved from the free alcohols using fluoride or silanolate, allylic acetate precursors to 5-membered rings display distinct modes of activation. The utility of these compounds is demonstrated through the preparation of a variety of (Z)-alkene-containing polyenes and application to a concise total synthesis of leukotriene B3.
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Affiliation(s)
| | - Christian J Kuper
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford OX1 3TA , U.K
| | - Damien Cornut
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford OX1 3TA , U.K
| | - Felix Urbitsch
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford OX1 3TA , U.K
| | - Bryony L Elbert
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford OX1 3TA , U.K
| | - Edward A Anderson
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford OX1 3TA , U.K
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15
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Cobo AA, Armstrong BM, Fettinger JC, Franz AK. Catalytic Asymmetric Synthesis of Cyclopentene-spirooxindoles Bearing Vinylsilanes Capable of Further Transformations. Org Lett 2019; 21:8196-8200. [PMID: 31573211 DOI: 10.1021/acs.orglett.9b02852] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We report a scandium-catalyzed [3 + 2] annulation of alkylideneoxindoles with allenylsilanes for the enantioselective formation of cyclopentene-spirooxindoles containing vinylsilanes. Using a Sc(OTf)2/PyBOX/BArF complex, the spiroannulation of allenylsilanes affords products with >94:6 dr and >90:10 er. The effect of the counterion and ligand to control selectivity is discussed. The transformation of the vinylsilane is demonstrated using cross-coupling, epoxidation, and Tamao-Fleming oxidation reactions. A series of competition experiments provide a comparison of nucleophilicity between allyl- and allenylsilanes.
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Affiliation(s)
- Angel A Cobo
- Department of Chemistry , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Brittany M Armstrong
- Department of Chemistry , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
| | - James C Fettinger
- Department of Chemistry , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Annaliese K Franz
- Department of Chemistry , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
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16
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Song L, Feng Q, Wang Y, Ding S, Wu YD, Zhang X, Chung LW, Sun J. Ru-Catalyzed Migratory Geminal Semihydrogenation of Internal Alkynes to Terminal Olefins. J Am Chem Soc 2019; 141:17441-17451. [DOI: 10.1021/jacs.9b09658] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lijuan Song
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
| | - Qiang Feng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yong Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Shengtao Ding
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yun-Dong Wu
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
- College of Chemistry, Peking University, Beijing 100871, China
| | - Xinhao Zhang
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Lung Wa Chung
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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17
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Xie X, Zhang X, Gao W, Meng C, Wang X, Ding S. Iridium-catalyzed Markovnikov hydrosilylation of terminal alkynes achieved by using a trimethylsilyl-protected trihydroxysilane. Commun Chem 2019. [DOI: 10.1038/s42004-019-0206-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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18
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Longobardi LE, Fürstner A. trans
‐Hydroboration of Propargyl Alcohol Derivatives and Related Substrates. Chemistry 2019; 25:10063-10068. [DOI: 10.1002/chem.201902228] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/07/2019] [Indexed: 01/04/2023]
Affiliation(s)
- Lauren E. Longobardi
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim/Ruhr Germany
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19
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Kameda R, Sohma T, Kobayashi K, Uchiyama R, Nosaka K, Konno H, Akaji K, Hattori Y. Convergent Synthesis of trans-2,6-Disubstituted Piperidine Alkaloid, (-)-iso-6-Spectaline by Palladium-Catalyzed Cyclization. Chem Pharm Bull (Tokyo) 2019; 67:253-257. [PMID: 30828001 DOI: 10.1248/cpb.c18-00817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The plant alkaloids, iso-6-spectaline and spectaline, isolated from the Cassia or Senna genera contain a characteristic 2,6-disubstituted piperidin-3-ol scaffold. Although both natural products are reported to exhibit a variety of interesting biological activities, few stereo-selective schemes for the construction of the 2,6-disubstituted scaffold have been reported. Following our previous studies regarding the synthesis of (+)-spectaline, herein we report the first convergent synthesis of (-)-iso-6-spectaline using a cross-metathesis under thermal conditions where the cis-2,6-disubstituted piperidin-3-ol scaffold is condensed with a long alkyl chain containing a terminal olefin. The cis-2,6-disubstituted piperidin-3-ol used in the synthesis was prepared simply via Pd(II)-catalyzed diastereoselective cyclization. It was confirmed that (+)-spectaline, an epimer of (-)-iso-6-spectaline, was selectively synthesized by the cross-metathesis reaction under less intense thermal conditions starting from the same cis-2,6-disubstituted piperidin-3-ol derivative.
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Affiliation(s)
- Risako Kameda
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Takuto Sohma
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Kazuya Kobayashi
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Ryosuke Uchiyama
- 2nd Department of Biochemistry, Faculty of Pharmaceutical Sciences, Mukogawa Women's University
| | - Kazuto Nosaka
- 2nd Department of Biochemistry, Faculty of Pharmaceutical Sciences, Mukogawa Women's University
| | - Hiroyuki Konno
- Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
| | - Kenichi Akaji
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Yasunao Hattori
- Center for Instrumental Analysis, Kyoto Pharmaceutical University
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20
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Walkowiak J, Salamon K, Franczyk A, Stefanowska K, Szyling J, Kownacki I. Pt-Catalyzed Hydrosilylation of 1,3-Diynes with Triorganosilanes: Regio- and Stereoselective Synthesis of Mono- or Bis-silylated Adducts. J Org Chem 2019; 84:2358-2365. [DOI: 10.1021/acs.joc.8b03143] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jędrzej Walkowiak
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
| | - Katarzyna Salamon
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614 Poznan, Poland
| | - Adrian Franczyk
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
| | - Kinga Stefanowska
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614 Poznan, Poland
| | - Jakub Szyling
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614 Poznan, Poland
| | - Ireneusz Kownacki
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Umultowska 89c, 61-614 Poznan, Poland
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614 Poznan, Poland
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21
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Zhang X, Ji X, Xie X, Ding S. Construction of highly sterically hindered 1,1-disilylated terminal alkenes. Chem Commun (Camb) 2018; 54:12958-12961. [PMID: 30379149 DOI: 10.1039/c8cc07765g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
One direct and efficient procedure for the synthesis of 1,1-disilylated terminal alkenes is demonstrated in this paper. To overcome and rationally utilize the steric hindrance of silyl units, the cationic ruthenium catalyst [CpRu(MeCN)3]+ was found to be effective for Markovnikov hydrosilylation of 1-silyl terminal alkynes with high yields and excellent regioselectivity. Dissimilarities between alkyl and alkoxy silyl units lead to versatile product derivatizations toward a variety of useful building blocks.
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Affiliation(s)
- Xueyan Zhang
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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22
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Fürstner A. trans-Hydrogenation, gem-Hydrogenation, and trans-Hydrometalation of Alkynes: An Interim Report on an Unorthodox Reactivity Paradigm. J Am Chem Soc 2018; 141:11-24. [DOI: 10.1021/jacs.8b09782] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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23
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Abstract
The synthesis of the macrocyclic core of the cytotoxic natural product salarin C from the sponge Fascaplysinopsis sp. is described, with the two epoxides being replaced by alkene moieties. In the key step, ring-closing metathesis exclusively afforded the ( E)-product. NOESY-based conformational analysis of the macrolactone showed that the oxazole ring and its unsaturated side chains are located in a common plane. Mimicking the conversion of salarin C to salarin A, the trisubstituted oxazole unit embedded in the 17-membered ring underwent photooxidation on treatment with singlet oxygen, affording macrocyclic trisacylamines.
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Affiliation(s)
- Jan-Niklas Schäckermann
- TU Braunschweig , Institute of Organic Chemistry , Hagenring 30 , 38106 Braunschweig , Germany
| | - Thomas Lindel
- TU Braunschweig , Institute of Organic Chemistry , Hagenring 30 , 38106 Braunschweig , Germany
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24
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Liu R, Wang L, Li Q, Liao M, Yang Z, Huang Y, Zheng B, Bian Q, Wang M, Liu S. Enantioselective Synthesis of Optically Active O
-Benzoyl-Protected α-Hydroxyl-β,γ-Unsaturated Acids with Chiral Induction of ( S
)-Glyceraldehyde Acetonide. ChemistrySelect 2017. [DOI: 10.1002/slct.201702244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ruiquan Liu
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Lei Wang
- Nutrichem Company Limited; No. 27 Life Sciences Park Road, Changping District Beijing 102206, P.R. China
| | - Qibo Li
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Min Liao
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Zhikun Yang
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Yun Huang
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Bing Zheng
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Qinghua Bian
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Min Wang
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
| | - Shangzhong Liu
- Department of Applied Chemistry; China Agricultural University; NO. 2 Yuanmingyuan West Road Beijing 100193, P. R. China
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25
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Vyvyan JR, Engles CA, Bray SL, Wold ED, Porter CL, Konev MO. Synthesis of substituted Z-styrenes by Hiyama-type coupling of oxasilacycloalkenes: application to the synthesis of a 1-benzoxocane. Beilstein J Org Chem 2017; 13:2122-2127. [PMID: 29062432 PMCID: PMC5647712 DOI: 10.3762/bjoc.13.209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 09/22/2017] [Indexed: 01/08/2023] Open
Abstract
Several Hiyama cross-coupling reactions of oxasilacycloalkenes and aryl iodides are described that produce trisubstituted Z-styrenes in moderate to excellent yields. Both electron-rich and electron-poor aryl iodides are tolerated in the cross-coupling reaction. The oxasilacycloalkene coupling partners were prepared by ruthenium-catalyzed intramolecular anti-hydrosilylation of alkynols. One of the cross-coupling products was converted to a 1-benzoxocane, albeit in low yield, using an intramolecular Buchwald–Hartwig etherification. The cyclic ether produced contains the carbon skeleton of heliannuol A.
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Affiliation(s)
- James R Vyvyan
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
| | - Courtney A Engles
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
| | - Scott L Bray
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
| | - Erik D Wold
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
| | - Christopher L Porter
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
| | - Mikhail O Konev
- Department of Chemistry, Western Washington University, 516 High Street, Bellingham, WA 98225, USA
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26
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Raghavan S, Chiluveru RK. Synthesis of an advanced intermediate enroute to (−)-clavosolide A. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Sommer H, Hamilton JY, Fürstner A. A Method for the Late-Stage Formation of Ketones, Acyloins, and Aldols from Alkenylstannanes: Application to the Total Synthesis of Paecilonic Acid A. Angew Chem Int Ed Engl 2017; 56:6161-6165. [DOI: 10.1002/anie.201701391] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Heiko Sommer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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28
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Sommer H, Hamilton JY, Fürstner A. A Method for the Late-Stage Formation of Ketones, Acyloins, and Aldols from Alkenylstannanes: Application to the Total Synthesis of Paecilonic Acid A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701391] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Heiko Sommer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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29
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Roşca DA, Radkowski K, Wolf LM, Wagh M, Goddard R, Thiel W, Fürstner A. Ruthenium-Catalyzed Alkyne trans-Hydrometalation: Mechanistic Insights and Preparative Implications. J Am Chem Soc 2017; 139:2443-2455. [DOI: 10.1021/jacs.6b12517] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Karin Radkowski
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Larry M. Wolf
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Minal Wagh
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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30
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Kim Y, Dateer RB, Chang S. Borane-Catalyzed Selective Hydrosilylation of Internal Ynamides Leading to β-Silyl (Z)-Enamides. Org Lett 2016; 19:190-193. [DOI: 10.1021/acs.orglett.6b03485] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Youngchan Kim
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center
for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Ramesh B. Dateer
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center
for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sukbok Chang
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center
for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
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31
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Yadav NN, Choi J, Ha HJ. One-pot multiple reactions: asymmetric synthesis of 2,6-cis-disubstituted piperidine alkaloids from chiral aziridine. Org Biomol Chem 2016; 14:6426-34. [PMID: 27189444 DOI: 10.1039/c6ob00806b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A divergent, new, and highly stereoselective synthesis of cis-2,6-disubstituted piperidine natural products including isosolenopsins, deoxocassine, and spectaline was achieved from chiral aziridine decorated with appropriate alkyl chains for isosolenopsins or alkynyl groups for deoxocassine and spectaline at C2. The characteristic feature of this synthesis is one-pot sequential reactions under atmospheric hydrogen including the reduction of alkyne (for deoxocassine and spectaline), reductive ring-opening of aziridine, debenzylation, and intramolecular reductive amination in high yields. The prerequisite aziridines were elaborated from commercially available (2S)-hydroxymethylaziridine through oxidation, Wittig olefination, and the Grignard reaction for isosolenopsins or substrate-controlled lithium alkynylate addition for deoxocassine and spectaline.
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Affiliation(s)
- Nagendra Nath Yadav
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 17035, Korea.
| | - Jihye Choi
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 17035, Korea.
| | - Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 17035, Korea.
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32
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Pennell MN, Kyle MP, Gibson SM, Male L, Turner PG, Grainger RS, Sheppard TD. Intercepting the Gold-Catalysed Meyer-Schuster Rearrangement by Controlled Protodemetallation: A Regioselective Hydration of Propargylic Alcohols. Adv Synth Catal 2016; 358:1519-1525. [PMID: 29200990 PMCID: PMC5698882 DOI: 10.1002/adsc.201600101] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/18/2016] [Indexed: 12/16/2022]
Abstract
The regioselective gold‐catalysed hydration of propargylic alcohols to β‐hydroxy ketones can be achieved by diverting the gold‐catalysed Meyer–Schuster rearrangement through the addition of a protic additive with a pKa of 7–9 such as p‐nitrophenol, boric acid or a boronic acid. This provides an interesting alternative to an aldol reaction when combined with the straightforward addition of an alkyne to an aldehyde or ketone. The gold‐catalysed reaction of an electron‐deficient, sterically hindered propargylic alcohol with a boronic acid led to the formation of an unusually stable cyclic boron enolate. ![]()
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Affiliation(s)
- Matthew N Pennell
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
| | - Michael P Kyle
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Samantha M Gibson
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
| | - Louise Male
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Peter G Turner
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage, Herts SG1 2NY U.K
| | - Richard S Grainger
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Tom D Sheppard
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
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33
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Frihed TG, Fürstner A. Progress in the trans-Reduction and trans-Hydrometalation of Internal Alkynes. Applications to Natural Product Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20150317] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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34
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A divergent approach for asymmetric syntheses of (+)-spicigerine, (+)-cassine and their 3-epimers. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Zaranek M, Marciniec B, Pawluć P. Ruthenium-catalysed hydrosilylation of carbon–carbon multiple bonds. Org Chem Front 2016. [DOI: 10.1039/c6qo00261g] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent advances in ruthenium-catalysed hydrosilylation of C–C multiple bonds and its application to organic synthesis are highlighted.
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Affiliation(s)
- M. Zaranek
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
| | - B. Marciniec
- Centre for Advanced Technologies
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
| | - P. Pawluć
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
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36
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Story of Eribulin Mesylate: Development of the Longest Drug Synthesis. TOPICS IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1007/7081_2016_201] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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37
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Simal C, Bates RH, Ureña M, Giménez I, Koutsou C, Infantes L, Fernández de la Pradilla R, Viso A. Synthesis of Enantiopure 3-Hydroxypiperidines from Sulfinyl Dienyl Amines by Diastereoselective Intramolecular Cyclization and [2,3]-Sigmatropic Rearrangement. J Org Chem 2015; 80:7674-92. [PMID: 26162504 DOI: 10.1021/acs.joc.5b01307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The highly diastereoselective base-promoted intramolecular cyclization of a variety of enantiopure sulfinyl dienyl amines provides novel sulfinyl tetrahydropyridines that are readily converted to 3-hydroxy tetrahydropyridines via sigmatropic rearrangement. The influence of N- and C- substituents on the process has been studied. Procedures to shorten the sequence such as the tandem cyclization followed by [2,3]-sigmatropic rearrangement, as well as cyclization of the free amine, under Boc- or ArSO- deprotection conditions have been examined. Good to excellent levels of selectivity are generally observed for the reported transformations (dr: 75/25 to >98/2). A novel protocol to access substituted amino dienyl sulfoxides is also reported.
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Affiliation(s)
- Carmen Simal
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Robert H Bates
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Mercedes Ureña
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Irene Giménez
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Christina Koutsou
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Lourdes Infantes
- ‡Instituto de Química Física Rocasolano, IQFR-CSIC, Serrano 119, 28006 Madrid, Spain
| | | | - Alma Viso
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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38
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Ely RJ, Yu Z, Morken JP. Diastereoselective Ni-catalyzed 1,4-hydroboration of chiral dienols. Tetrahedron Lett 2015; 56:3402-3405. [PMID: 26028782 DOI: 10.1016/j.tetlet.2015.01.123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The Ni-catalyzed hydroboration of dienols occurs in a 1,4 fashion and delivers a syn-propionate motif in high diastereoselectivity and with a stereodefined trisubstituted crotylboronic ester. The boronic ester can be further manipulated to provide carbon-carbon or carbon-oxygen bonds.
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Affiliation(s)
- Robert J Ely
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
| | - Zhiyong Yu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
| | - James P Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
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39
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Diethelm S, Carreira EM. Total Synthesis of Gelsemoxonine through a Spirocyclopropane Isoxazolidine Ring Contraction. J Am Chem Soc 2015; 137:6084-96. [DOI: 10.1021/jacs.5b02574] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Diethelm
- Eidgenössische Technische Hochschule Zürich, Vladimir-Prelog-Weg 3, HCI H335, 8093 Zürich, Switzerland
| | - Erick M. Carreira
- Eidgenössische Technische Hochschule Zürich, Vladimir-Prelog-Weg 3, HCI H335, 8093 Zürich, Switzerland
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40
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Rummelt SM, Radkowski K, Roşca DA, Fürstner A. Interligand Interactions Dictate the Regioselectivity oftrans-Hydrometalations and Related Reactions Catalyzed by [Cp*RuCl]. Hydrogen Bonding to a Chloride Ligand as a Steering Principle in Catalysis. J Am Chem Soc 2015; 137:5506-19. [DOI: 10.1021/jacs.5b01475] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Karin Radkowski
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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41
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Fuchs M, Fürstner A. trans-Hydrogenation: application to a concise and scalable synthesis of brefeldin A. Angew Chem Int Ed Engl 2015; 54:3978-82. [PMID: 25651519 PMCID: PMC4471581 DOI: 10.1002/anie.201411618] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 11/07/2022]
Abstract
The important biochemical probe molecule brefeldin A (1) has served as an inspirational target in the past, but none of the many routes has actually delivered more than just a few milligrams of product, where documented. The approach described herein is clearly more efficient; it hinges upon the first implementation of ruthenium-catalyzed trans-hydrogenation in natural products total synthesis. Because this unorthodox reaction is selective for the triple bond and does not touch the transannular alkene or the lactone site of the cycloalkyne, it outperforms the classical Birch-type reduction that could not be applied at such a late stage. Other key steps en route to 1 comprise an iron-catalyzed reductive formation of a non-terminal alkyne, an asymmetric propiolate carbonyl addition mediated by a bulky amino alcohol, and a macrocyclization by ring-closing alkyne metathesis catalyzed by a molybdenum alkylidyne.
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Affiliation(s)
- Michael Fuchs
- Max-Planck-Institut für Kohlenforschung45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470 Mülheim/Ruhr (Germany)
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42
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Hattori Y, Katsuyama M, Furuta M, Kobayashi K, Teruya K, Makabe H, Akaji K. Divergent Synthesis of 2,6-Disubstituted Piperidine Alkaloid, (+)-Spectaline by Palladium-Catalyzed Cyclization. HETEROCYCLES 2015. [DOI: 10.3987/com-15-13172] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Guo S, Liu J, Ma D. Total Synthesis of Leucosceptroids A and B. Angew Chem Int Ed Engl 2014; 54:1298-301. [DOI: 10.1002/anie.201410134] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Indexed: 11/06/2022]
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44
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Gao R, Pahls DR, Cundari TR, Yi CS. Experimental and Computational Studies of the Ruthenium-Catalyzed Hydrosilylation of Alkynes: Mechanistic Insights into the Regio- and Stereoselective Formation of Vinylsilanes. Organometallics 2014. [DOI: 10.1021/om501019j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ruili Gao
- Department
of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881 United States
| | - Dale R. Pahls
- Department
of Chemistry, CASCaM, University of North Texas, Denton, Texas 76203-5017 United States
| | - Thomas R. Cundari
- Department
of Chemistry, CASCaM, University of North Texas, Denton, Texas 76203-5017 United States
| | - Chae S. Yi
- Department
of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881 United States
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46
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Yadav JS, Reddy NM, Rahman MA, Prasad AR. Synthesis of the Spiroketal Fragment of (-)-Ushikulide A. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Elbert BL, Lim DSW, Gudmundsson HG, O'Hanlon JA, Anderson EA. Synthesis of cyclic alkenylsiloxanes by semihydrogenation: a stereospecific route to (Z)-alkenyl polyenes. Chemistry 2014; 20:8594-8. [PMID: 24899240 PMCID: PMC4531823 DOI: 10.1002/chem.201403255] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 11/24/2022]
Abstract
Cyclic alkenylsiloxanes were synthesized by semihydrogenation of alkynylsilanes-a reaction previously plagued by poor stereoselectivity. The silanes, which can be synthesized on multigram scale, undergo Hiyama-Denmark coupling to give (Z)-alkenyl polyene motifs found in bioactive natural products. The ring size of the silane is crucial: five-membered cyclic siloxanes also couple under fluoride-free conditions, whilst their six-membered homologues do not, enabling orthogonality within this structural motif.
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Affiliation(s)
- Bryony L Elbert
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA, U.K. Fax: (+44) 1865-285002 E-mail:
| | - Diane S W Lim
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA, U.K. Fax: (+44) 1865-285002 E-mail:
| | - Haraldur G Gudmundsson
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA, U.K. Fax: (+44) 1865-285002 E-mail:
| | - Jack A O'Hanlon
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA, U.K. Fax: (+44) 1865-285002 E-mail:
| | - Edward A Anderson
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA, U.K. Fax: (+44) 1865-285002 E-mail:
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48
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Winters MP, Teleha CA, Sui Z. Synthesis of substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles by intramolecular nitrilimine cycloaddition. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Bassaco MM, Fortes MP, Back DF, Kaufman TS, Silveira CC. An eco-friendly synthesis of novel 3,5-disubstituted-1,2-isoxazoles in PEG-400, employing the Et3N-promoted hydroamination of symmetric and unsymmetric 1,3-diyne-indole derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra11571f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
PEG-400 proved to be a useful solvent for the mild and efficient synthesis of 3,5-disubstituted 1,2-isoxazoles derived from 1,3-diyne indoles. The scope and limitations of the reaction were also studied.
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Affiliation(s)
- Mariana M. Bassaco
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria, Brazil
| | - Margiani P. Fortes
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria, Brazil
| | - Davi F. Back
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria, Brazil
| | | | - Claudio C. Silveira
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria, Brazil
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50
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Horino Y, Takahashi Y, Nakashima Y, Abe H. Relay catalysis using a gold(i) complex/Brønsted acid binary system for the synthesis of bezoxasiloles. RSC Adv 2014. [DOI: 10.1039/c3ra47149g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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