1
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Liu M, Tang T, Apolinar O, Matsuura R, Busacca CA, Qu B, Fandrick DR, Zatolochnaya OV, Senanayake CH, Song JJ, Engle KM. Atom-Economical Cross-Coupling of Internal and Terminal Alkynes to Access 1,3-Enynes. J Am Chem Soc 2021; 143:3881-3888. [PMID: 33683868 DOI: 10.1021/jacs.0c12565] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Selective carbon-carbon (C-C) bond formation in chemical synthesis generally requires prefunctionalized building blocks. However, the requisite prefunctionalization steps undermine the overall efficiency of synthetic sequences that rely on such reactions, which is particularly problematic in large-scale applications, such as in the commercial production of pharmaceuticals. Herein, we describe a selective and catalytic method for synthesizing 1,3-enynes without prefunctionalized building blocks. In this transformation several classes of unactivated internal acceptor alkynes can be coupled with terminal donor alkynes to deliver 1,3-enynes in a highly regio- and stereoselective manner. The scope of compatible acceptor alkynes includes propargyl alcohols, (homo)propargyl amine derivatives, and (homo)propargyl carboxamides. This method is facilitated by a tailored P,N-ligand that enables regioselective addition and suppresses secondary E/Z-isomerization of the product. The reaction is scalable and can operate effectively with as low as 0.5 mol % catalyst loading. The products are versatile intermediates that can participate in various downstream transformations. We also present preliminary mechanistic experiments that are consistent with a redox-neutral Pd(II) catalytic cycle.
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Affiliation(s)
- Mingyu Liu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Tianhua Tang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Omar Apolinar
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Rei Matsuura
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Carl A Busacca
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Bo Qu
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Daniel R Fandrick
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Olga V Zatolochnaya
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Chris H Senanayake
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Jinhua J Song
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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2
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Zhu L, Guo H, Feng X, Yamamoto Y, Bao M. Copper-Catalyzed One-Pot Synthesis of 1,3-Enynes from 2-Chloro- N-(quinolin-8-yl)acetamides and Terminal Alkynes. J Org Chem 2020; 85:8740-8748. [PMID: 32486641 DOI: 10.1021/acs.joc.0c01102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for the chemo-, regio-, and stereoselective one-pot synthesis of 1,3-enynes is described. The reaction of 2-chloro-N-(quinolin-8-yl)acetamides with terminal alkynes proceeds smoothly in the presence of a copper catalyst at room temperature to produce (E)-1,3-enynes in satisfactory to excellent yields. The mechanism study reveals that the cross-dimerization of internal alkynes generated in situ with terminal alkynes proceeds via allene intermediates. The directing group 8-aminoquinoline plays a key role in the current selective synthesis of (E)-1,3-enynes.
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Affiliation(s)
- Lifan Zhu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Hongyu Guo
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Feng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Yoshinori Yamamoto
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.,Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.,Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
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3
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Han S, Kim HS, Zhang M, Xia Y, Lee S. Ni/Cu-Catalyzed Decarboxylative Addition of Alkynoic Acids to Terminal Alkynes for the Synthesis of gem-1,3-Enynes. Org Lett 2019; 21:5426-5431. [PMID: 31184167 DOI: 10.1021/acs.orglett.9b01625] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of gem-1,3-enynes via Ni/Cu-catalyzed decarboxylative addition of alkynoic acids to terminal alkynes has been developed. It was found that the decarboxylation of an alkynoic acid led predominantly to gem-1,3-enynes instead of 1,3-diynes, which have been known to be formed through the coupling of terminal alkynes. A variety of gem-1,3-enynes were obtained in good yields. This catalytic system exhibited excellent regioselectivity and high functional group tolerance.
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Affiliation(s)
- Sehyeon Han
- Department of Chemistry , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Han-Sung Kim
- Department of Chemistry , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Maosheng Zhang
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang Province 325035 , P. R. China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang Province 325035 , P. R. China
| | - Sunwoo Lee
- Department of Chemistry , Chonnam National University , Gwangju 61186 , Republic of Korea
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4
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Mirzaei A, Peng XS, Wong HNC. PtCl 2-Catalyzed Cycloisomerization of 1,8-Enynes: Synthesis of Tetrahydropyridine Species. Org Lett 2019; 21:3795-3798. [PMID: 31042044 DOI: 10.1021/acs.orglett.9b01250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The cycloisomerization of 1,8-enynes in the presence of platinum(II) chloride was developed to generate bicyclic nitrogen-containing heterocycle species via 6- endo-dig cyclization and [3,3]-sigmatropic rearrangement in acceptable to good yields. The related control experiments and preliminary mechanistic studies indicate a plausible mechanism involving 1,6- endo-dig aminoplatination of the alkyne and allylic [3,3]-sigmatropic rearrangement with total inversion of the allylic moiety.
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Affiliation(s)
- Anvar Mirzaei
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories , Hong Kong SAR, China
| | - Xiao-Shui Peng
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories , Hong Kong SAR, China.,Shenzhen Center of Novel Functional Molecules, Shenzhen Research Institute , The Chinese University of Hong Kong , No.10, Second Yuexing Road , Shenzhen 518507 , P.R. China
| | - Henry N C Wong
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories , Hong Kong SAR, China.,Shenzhen Center of Novel Functional Molecules, Shenzhen Research Institute , The Chinese University of Hong Kong , No.10, Second Yuexing Road , Shenzhen 518507 , P.R. China
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5
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Duan CL, Tan YX, Zhang JL, Yang S, Dong HQ, Tian P, Lin GQ. Highly Enantioselective Rhodium-Catalyzed Cross-Addition of Silylacetylenes to Cyclohexadienone-Tethered Internal Alkynes. Org Lett 2019; 21:1690-1693. [DOI: 10.1021/acs.orglett.9b00249] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Chang-Lin Duan
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Yun-Xuan Tan
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jun-Li Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
| | - Shiping Yang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Han-Qing Dong
- Arvinas, Inc., 5 Science Park 395 Winchester Avenue, New Haven, Connecticut 06511, United States
| | - Ping Tian
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Guo-Qiang Lin
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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6
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Asahara H, Sofue A, Kuroda Y, Nishiwaki N. Alkynylation and Cyanation of Alkenes Using Diverse Properties of a Nitro Group. J Org Chem 2018; 83:13691-13699. [DOI: 10.1021/acs.joc.8b01865] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haruyasu Asahara
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
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7
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Salvio R, Juliá-Hernández F, Pisciottani L, Mendoza-Meroño R, García-Granda S, Bassetti M. Kinetics and Mechanistic Insights into the Acetate-Assisted Dimerization of Terminal Alkynes under Ruthenium- and Acid-Promoted (RAP) Catalysis. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00583] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riccardo Salvio
- Istituto
di Metodologie Chimiche (IMC) del Consiglio Nazionale delle Ricerche
(CNR), Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, I-00185 Roma, Italy
| | - Francisco Juliá-Hernández
- Istituto
di Metodologie Chimiche (IMC) del Consiglio Nazionale delle Ricerche
(CNR), Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, I-00185 Roma, Italy
| | - Luca Pisciottani
- Istituto
di Metodologie Chimiche (IMC) del Consiglio Nazionale delle Ricerche
(CNR), Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, I-00185 Roma, Italy
| | - Rafael Mendoza-Meroño
- Departamento
de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
| | - Santiago García-Granda
- Departamento
de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
| | - Mauro Bassetti
- Istituto
di Metodologie Chimiche (IMC) del Consiglio Nazionale delle Ricerche
(CNR), Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, I-00185 Roma, Italy
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8
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Transmetalation of Alkylzirconocenes in Copper-Catalyzed Alkyl-Alkynyl Cross-Coupling Reactions. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Affiliation(s)
- Kathrin H. Hopmann
- Centre for Theoretical and
Computational Chemistry (CTCC) and Department of Chemistry, University of Tromsø - The Artic University of Norway, N-9037 Tromsø, Norway
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10
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Zhou Y, Zhang Y, Wang J. Recent advances in transition-metal-catalyzed synthesis of conjugated enynes. Org Biomol Chem 2016; 14:6638-50. [DOI: 10.1039/c6ob00944a] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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11
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Mechanisms for the synthesis of conjugated enynes from diphenylacetylene and trimethylsilylacetylene catalyzed by a nickel(0) complex: DFT study of ligand-controlled selectivity. J Mol Model 2015; 21:135. [DOI: 10.1007/s00894-015-2672-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 03/31/2015] [Indexed: 10/23/2022]
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12
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Hari Babu M, Dwivedi V, Kant R, Sridhar Reddy M. Palladium-Catalyzed Regio- and Stereoselective Cross-Addition of Terminal Alkynes to Ynol Ethers and Synthesis of 1,4-Enyn-3-ones. Angew Chem Int Ed Engl 2015; 54:3783-6. [DOI: 10.1002/anie.201411261] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Indexed: 01/08/2023]
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13
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Hari Babu M, Dwivedi V, Kant R, Sridhar Reddy M. Palladium-Catalyzed Regio- and Stereoselective Cross-Addition of Terminal Alkynes to Ynol Ethers and Synthesis of 1,4-Enyn-3-ones. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411261] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Dwivedi V, Hari Babu M, Kant R, Sridhar Reddy M. N-Substitution dependent stereoselectivity switch in palladium catalyzed hydroalkynylation of ynamides: a regio and stereoselective synthesis of ynenamides. Chem Commun (Camb) 2015; 51:14996-9. [DOI: 10.1039/c5cc06251a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A palladium catalysed regioselective hydroalkynylation of ynamides for ynenamides is achieved with an N-substitution dependent stereoselectivity switch.
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Affiliation(s)
- Vikas Dwivedi
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Madala Hari Babu
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Ruchir Kant
- Molecular & Structural Biology Division
- CSIR-CDRI
- Lucknow 226031
- India
| | - Maddi Sridhar Reddy
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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15
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Bharate JB, Abbat S, Sharma R, Bharatam PV, Vishwakarma RA, Bharate SB. Cobalt(ii) catalyzed C(sp)–H bond functionalization of alkynes with phenyl hydrazines: facile access to diaryl 1,2-diketones. Org Biomol Chem 2015; 13:5235-42. [DOI: 10.1039/c5ob00419e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A cobalt acetylacetonate catalyzed oxidative diketonation of alkynes via C(sp)–H bond functionalization has been described. Its application to the synthesis of imidazoles has also been demonstrated.
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Affiliation(s)
- Jaideep B. Bharate
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Sheenu Abbat
- Departments of Pharmacoinformatics and Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- SAS Nagar
- India
| | - Rohit Sharma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Prasad V. Bharatam
- Departments of Pharmacoinformatics and Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- SAS Nagar
- India
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Sandip B. Bharate
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
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16
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Liu G, Kong W, Che J, Zhu G. Palladium-Catalyzed Cross Addition of Terminal Alkynes to Aryl Ynamides: An Unusualtrans-Hydroalkynylation Reaction. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400572] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Azpíroz R, Rubio-Pérez L, Castarlenas R, Pérez-Torrente JJ, Oro LA. gem-Selective Cross-Dimerization and Cross-Trimerization of Alkynes with Silylacetylenes Promoted by a Rhodium-Pyridine-N-Heterocyclic Carbene Catalyst. ChemCatChem 2014. [DOI: 10.1002/cctc.201402327] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Ventre S, Derat E, Amatore M, Aubert C, Petit M. Hydrido-Cobalt Catalyst as a Selective Tool for the Dimerisation of Arylacetylenes: Scope and Theoretical Studies. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300486] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Lim JW, Kim KH, Kim SH, Kim JN. Controlled synthesis of 1-vinylnaphthalenes versus (E)-α-(1,3-enyn-4-yl)-α,β-unsaturated esters from Morita–Baylis–Hillman bromides: a sequential alkynylation and competitive 6π-electrocyclization versus conjugative transposition of a triple bond. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Sakurada T, Sugiyama YK, Okamoto S. Cobalt-Catalyzed Cross Addition of Silylacetylenes to Internal Alkynes. J Org Chem 2013; 78:3583-91. [DOI: 10.1021/jo400064b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tetsuya Sakurada
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
| | - Yu-ki Sugiyama
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
| | - Sentaro Okamoto
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
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21
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Hoshino Y, Shibata Y, Tanaka K. Rhodium-Catalyzed Three-Component Cross-Addition of Silylacetylenes, Alkynyl Esters, and Electron-Deficient Alkenes or Isocyanates. Angew Chem Int Ed Engl 2012; 51:9407-11. [DOI: 10.1002/anie.201204646] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Indexed: 11/06/2022]
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22
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Hoshino Y, Shibata Y, Tanaka K. Rhodium-Catalyzed Three-Component Cross-Addition of Silylacetylenes, Alkynyl Esters, and Electron-Deficient Alkenes or Isocyanates. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204646] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Coniglio A, Bassetti M, García‐Garrido SE, Gimeno J. Dimerization of Terminal Arylalkynes in Aqueous Medium by Ruthenium and Acid Promoted (RAP) Catalysis: Acetate‐ Assisted (
sp
)C(
sp
2
)C Bond Formation. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100600] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alessandra Coniglio
- Istituto CNR di Metodologie Chimiche, Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Università “La Sapienza”, P. le Aldo Moro 5, I‐00185 Roma, Italy, Fax: (+39)‐06‐490‐421; phone: (+39)‐06‐499‐13769
| | - Mauro Bassetti
- Istituto CNR di Metodologie Chimiche, Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Università “La Sapienza”, P. le Aldo Moro 5, I‐00185 Roma, Italy, Fax: (+39)‐06‐490‐421; phone: (+39)‐06‐499‐13769
| | - Sergio E. García‐Garrido
- Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica “Enrique Moles” (Unidad Asociada al C.S.I.C.), Universidad de Oviedo, C/Julían Clavería 8, E‐33071 Oviedo, Principado de Asturias, Spain, Fax: (+34)‐985‐103‐446; phone: (+34)‐985‐103‐461
| | - José Gimeno
- Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica “Enrique Moles” (Unidad Asociada al C.S.I.C.), Universidad de Oviedo, C/Julían Clavería 8, E‐33071 Oviedo, Principado de Asturias, Spain, Fax: (+34)‐985‐103‐446; phone: (+34)‐985‐103‐461
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24
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Ogata K, Fukuzawa SI. Development of Nickel-Catalyzed Three-Component Reactions via C-H or C-C Bond Activation. J SYN ORG CHEM JPN 2012. [DOI: 10.5059/yukigoseikyokaishi.70.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kenichi Ogata
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University
| | - Shin-ichi Fukuzawa
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University
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25
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Na R, Jing C, Xu Q, Jiang H, Wu X, Shi J, Zhong J, Wang M, Benitez D, Tkatchouk E, Goddard WA, Guo H, Kwon O. Phosphine-catalyzed annulations of azomethine imines: allene-dependent [3 + 2], [3 + 3], [4 + 3], and [3 + 2 + 3] pathways. J Am Chem Soc 2011; 133:13337-48. [PMID: 21812448 PMCID: PMC3163120 DOI: 10.1021/ja200231v] [Citation(s) in RCA: 275] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper we describe the phosphine-catalyzed [3 + 2], [3 + 3], [4 + 3], and [3 + 2 + 3] annulations of azomethine imines and allenoates. These processes mark the first use of azomethine imines in nucleophilic phosphine catalysis, producing dinitrogen-fused heterocycles, including tetrahydropyrazolo-pyrazolones, -pyridazinones, -diazepinones, and -diazocinones. Counting the two different reaction modes in the [3 + 3] cyclizations, there are five distinct reaction pathways-the choice of which depends on the structure and chemical properties of the allenoate. All reactions are operationally simple and proceed smoothly under mild reaction conditions, affording a broad range of 1,2-dinitrogen-containing heterocycles in moderate to excellent yields. A zwitterionic intermediate formed from a phosphine and two molecules of ethyl 2,3-butadienoate acted as a 1,5-dipole in the annulations of azomethine imines, leading to the [3 + 2 + 3] tetrahydropyrazolo-diazocinone products. The incorporation of two molecules of an allenoate into an eight-membered-ring product represents a new application of this versatile class of molecules in nucleophilic phosphine catalysis. The salient features of this protocol--the facile access to a diverse range of nitrogen-containing heterocycles and the simple preparation of azomethine imine substrates--suggest that it might find extensive applications in heterocycle synthesis.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Hongchao Guo
- Author to whom correspondence should be addressed. ;
| | - Ohyun Kwon
- Author to whom correspondence should be addressed. ;
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26
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Kownacki I, Marciniec B, Dudziec B, Kubicki M. Silylative Coupling of Terminal Alkynes with Iodosilanes: New Catalytic Activation of sp-Hybridized Carbon−Hydrogen Bonds. Organometallics 2011. [DOI: 10.1021/om200038r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ireneusz Kownacki
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Bogdan Marciniec
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Beata Dudziec
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Maciej Kubicki
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland
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27
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Ogata K, Atsuumi Y, Fukuzawa SI. Highly Chemoselective Nickel-Catalyzed Three-Component Cross-Trimerization between Two Distinct Terminal Alkynes and an Internal Alkyne. Org Lett 2010; 13:122-5. [DOI: 10.1021/ol102687p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kenichi Ogata
- Department of Applied Chemistry, Institute of Science and Enginnering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Yuka Atsuumi
- Department of Applied Chemistry, Institute of Science and Enginnering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Shin-ichi Fukuzawa
- Department of Applied Chemistry, Institute of Science and Enginnering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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28
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Villarino L, López F, Castedo L, Mascareñas J. Palladium-Catalyzed Hydroalkynylation of Alkylidenecyclopropanes. Chemistry 2009; 15:13308-12. [DOI: 10.1002/chem.200901821] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Matsuyama N, Hirano K, Satoh T, Miura M. Nickel- and rhodium-catalyzed addition of terminal silylacetylenes to propargyl amines: catalyst-dependent complementary regioselectivity. J Org Chem 2009; 74:3576-8. [PMID: 19354238 DOI: 10.1021/jo900474d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cross-addition of terminal silylacetylenes to gamma-arylated propargyl amines occurs efficiently via C-H cleavage by using either a nickel or rhodium catalyst. Taking advantage of the catalyst-controlled switching of regioselectivity in the reaction, both the 2- and 3-alkynylallylamines are readily accessible from the same starting materials.
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Affiliation(s)
- Naoto Matsuyama
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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30
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Ogata K, Sugasawa J, Fukuzawa SI. Highly Chemoselective Nickel-Catalyzed Three-Component Cross-Trimerization of Three Distinct Alkynes Leading to 1,3-Dien-5-ynes. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200902099] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Ogata K, Sugasawa J, Fukuzawa SI. Highly Chemoselective Nickel-Catalyzed Three-Component Cross-Trimerization of Three Distinct Alkynes Leading to 1,3-Dien-5-ynes. Angew Chem Int Ed Engl 2009; 48:6078-80. [DOI: 10.1002/anie.200902099] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Shirakura M, Suginome M. Nickel-catalyzed regioselective hydroalkynylation of styrenes: improved catalyst system, reaction scope, and mechanism. Org Lett 2009; 11:523-6. [PMID: 19143513 DOI: 10.1021/ol802475h] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Addition of the sp-C-H bond of triisopropylsilylacetylene to the carbon-carbon double bonds of styrenes bearing functional groups proceeded efficiently at room temperature in the presence of 3 mol % of Ni(cod)(2) with a PMePh(2) ligand. Use of 2-deuteriotriisopropylsilylacetylene in the hydroalkynylation of styrenes resulted in regioselective incorporation of deuterium into the beta-positions of recovered styrenes, along with its regioselective introduction into the product's methyl group.
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Affiliation(s)
- Masamichi Shirakura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
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33
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Tsuchikama K, Kasagawa M, Hashimoto YK, Endo K, Shibata T. Cationic iridium–BINAP complex-catalyzed addition of aryl ketones to alkynes and alkenes via directed C–H bond cleavage. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.09.065] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Matsuyama N, Tsurugi H, Satoh T, Miura M. Ligand-Controlled Cross-Dimerization and -Trimerization of Alkynes under Nickel Catalysis. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800399] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Lynam JM, Nixon TD, Whitwood AC. Solvent and phosphine dependency in the reaction of cis-RuCl2(P–P)2 (P–P=dppm or dppe) with terminal alkynes. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.06.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Katagiri T, Tsurugi H, Satoh T, Miura M. Rhodium-catalyzed (E)-selective cross-dimerization of terminal alkynes. Chem Commun (Camb) 2008:3405-7. [PMID: 18633504 DOI: 10.1039/b804573a] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cross-dimerization of various terminal alkynes with different bulky terminal alkynes such as triisopropylsilylacetylene and 1-trimethylsilyloxy-1,1-diphenyl-2-propyne efficiently proceeds in the presence of a rhodium catalyst system to produce the corresponding (E)-enynes with high regio- and stereoselectivity.
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Affiliation(s)
- Takashi Katagiri
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, Japan
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37
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Horita A, Tsurugi H, Satoh T, Miura M. Rhodium-Catalyzed Anti Selective Cross-Addition of Bis(trimethylsilyl)acetylene to Diarylacetylenes via Carbon−Silicon Bond Cleavage. Org Lett 2008; 10:1751-4. [DOI: 10.1021/ol8004003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akinobu Horita
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hayato Tsurugi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tetsuya Satoh
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masahiro Miura
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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38
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Doherty S, Knight JG, Smyth CH, Harrington RW, Clegg W. Biaryl-Like CATPHOS Diphosphines via Double Diels–Alder Cycloaddition between 1,4-Bis(diphenylphosphinoyl)buta-1,3-diyne and Anthracenes: Efficient Ligands for the Palladium-Catalyzed Amination of Aromatic Bromides and α-Arylation of Ketones. Organometallics 2008. [DOI: 10.1021/om800118t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simon Doherty
- School of Natural Sciences, Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Julian G. Knight
- School of Natural Sciences, Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Catherine H. Smyth
- School of Natural Sciences, Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Ross W. Harrington
- School of Natural Sciences, Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - William Clegg
- School of Natural Sciences, Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
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39
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Ciclosi M, Estevan F, Lahuerta P, Passarelli V, Pérez-Prieto J, Sanaú M. An Unprecedented Iridium(III) Catalyst for Stereoselective Dimerisation of Terminal Alkynes. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700406] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Tsukada N, Ninomiya S, Aoyama Y, Inoue Y. Palladium-catalyzed cross-addition of triisopropylsilylacetylene to unactivated alkynes. PURE APPL CHEM 2008. [DOI: 10.1351/pac200880051161] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Selective cross-addition of triisopropylsilylacetylene (TIPSA) to unactivated alkynes is catalyzed by dinuclear and mononuclear palladium complexes supported by a multidentate ligand, N,N'-bis[2-(diphenylphosphino)phenyl]formamidine (dpfamH). While the addition reactions of TIPSA to dialkylacetylenes using palladium catalysts supported by monodentate and bidentate ligands gives dimers of TIPSA as major products, the reactions with the palladium complexes supported by dpfam affords cross-adducts selectively, in which the yields of TIPSA dimers are less than 5 %. The addition of TIPSA to monoalkylacetylenes also gives cross-adducts as major products, although the selectivity and yield are moderate.
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Affiliation(s)
- Naofumi Tsukada
- 1Graduate School of Engineering, Tohoku University, Aoba, Sendai 980-8579, Japan
| | - Satoshi Ninomiya
- 1Graduate School of Engineering, Tohoku University, Aoba, Sendai 980-8579, Japan
| | - Yoshimi Aoyama
- 1Graduate School of Engineering, Tohoku University, Aoba, Sendai 980-8579, Japan
| | - Yoshio Inoue
- 1Graduate School of Engineering, Tohoku University, Aoba, Sendai 980-8579, Japan
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41
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Nishimura T, Guo XX, Ohnishi K, Hayashi T. Rhodium-Catalyzed Hydroalkynylation of Internal Alkynes with Silylacetylenes: An Alkynylrhodium(I) Intermediate Generated from the Hydroxorhodium(I) Complex [Rh(OH)(binap)]2. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200700334] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Ito JI, Kitase M, Nishiyama H. Cross-Coupling of Alkynes Catalyzed by Phebox−Rhodium Acetate Complexes. Organometallics 2007. [DOI: 10.1021/om700742t] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun-ichi Ito
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Megumi Kitase
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Hisao Nishiyama
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
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43
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Ogata K, Toyota A. Iridium(I) complex of chelating pyridine-2-thiolate ligand: Synthesis, reactivity, and application to the catalytic E-selective terminal alkyne dimerization via C–H activation. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.06.030] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Katagiri T, Tsurugi H, Funayama A, Satoh T, Miura M. Rhodium-catalyzed Selective Cross-coupling of Internal Alkynes with a Terminal Silylacetylene. CHEM LETT 2007. [DOI: 10.1246/cl.2007.830] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Tsukada N, Ninomiya S, Aoyama Y, Inoue Y. Palladium-catalyzed selective cross-addition of triisopropylsilylacetylene to internal and terminal unactivated alkynes. Org Lett 2007; 9:2919-21. [PMID: 17602565 DOI: 10.1021/ol071326g] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dinuclear and mononuclear palladium complexes having N,N'-bis[2-(diphenylphosphino)phenyl]amidinate (DPFAM) as a ligand catalyzed the cross-addition of triisopropylsilylacetylene (TIPSA) to unactivated internal alkynes, giving enynes selectively. When palladium catalysts having PPh3, TDMPP, dppe, or dppf were used, dimers of TIPSA were obtained as major products. The reactions of TIPSA with several terminal alkynes also gave cross-adducts selectively, although the yields were moderate.
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Affiliation(s)
- Naofumi Tsukada
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
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46
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Horita A, Tsurugi H, Funayama A, Satoh T, Miura M. Regio- and stereoselective cross-coupling of tert-propargyl alcohols with bis(trimethylsilyl)acetylene and its utilization in constructing a fluorescent donor-acceptor system. Org Lett 2007; 9:2231-3. [PMID: 17477540 DOI: 10.1021/ol070799k] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1,1-Disubstituted 3-aryl-2-propyn-1-ols undergo regio- and stereoselective cross-coupling on treatment with bis(trimethylsilyl)acetylene in the presence of a rhodium catalyst via cleavage of C(sp)-C(sp3) and C(sp)-Si bonds to produce the corresponding 2-hydroxymethyl-(E)-enynes. The subsequent desilylative Sonogashira coupling followed by base-promoted cyclization affords fluorescent dihydrofuran derivatives.
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Affiliation(s)
- Akinobu Horita
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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47
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Ghosh R, Zhang X, Achord P, Emge TJ, Krogh-Jespersen K, Goldman AS. Dimerization of Alkynes Promoted by a Pincer-Ligated Iridium Complex. C−C Reductive Elimination Inhibited by Steric Crowding. J Am Chem Soc 2007; 129:853-66. [PMID: 17243822 DOI: 10.1021/ja0647194] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The pincer-ligated species (PCP)Ir (PCP = kappa3-C6H3-2,6-(CH2PtBu2)2) is found to promote dimerization of phenylacetylene to give the enyne complex (PCP)Ir(trans-1,4-phenyl-but-3-ene-1-yne). The mechanism of this reaction is found to proceed through three steps: (i) addition of the alkynyl C-H bond to iridium, (ii) insertion of a second phenylacetylene molecule into the resulting Ir-H bond, and (iii) vinyl-acetylide reductive elimination. Each of these steps has been investigated, by both experimental and computational (DFT) methods, to yield unexpected conclusions of general interest. (i) The product of alkynyl C-H addition, (PCP)Ir(CCPh)(H) (3), has been isolated and, in accord with experimental observations, is calculated to be 29 kcal/mol more stable than the analogous product of benzene C-H addition. (ii) Insertion of a second PhCCH molecule into the Ir-H bond of 3 proceeds rapidly, but with a 1,2-orientation. This orientation gives (PCP)Ir(CCPh)(CPh=CH2) (4) which would yield the 1,3-diphenyl-enyne if it were to undergo C-C elimination; however, the insertion is reversible, which represents the first example, to our knowledge, of simple beta-H elimination from a vinyl group to give a terminal hydride. The 2,1-insertion product (PCP)Ir(CCPh)(CH=CHPh) (6) forms more slowly, but unlike the 1,2 insertion product it undergoes C-C elimination to give the observed enyne. (iii) The failure of 4 to undergo C-C elimination is found to be general for (PCP)Ir(CCPh)(vinyl) complexes in which the vinyl group has an alpha-substituent. Thus, although C-C elimination relieves crowding, the reaction is inhibited by increased crowding. Density-functional theory (DFT) calculations support this surprising conclusion and offer a clear explanation. Alkynyl-vinyl bond formation in the C-C elimination transition state involves the vinyl group pi-system; this requires that the vinyl group must rotate (around the Ir-C bond) by ca. 90 degrees to achieve an appropriate orientation. This rotation is severely inhibited by steric crowding, particularly when the vinyl group bears an alpha-substituent.
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Affiliation(s)
- Rajshekhar Ghosh
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, New Jersey 08854, USA
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48
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Nishimura T, Yasuhara Y, Hayashi T. Highly Selective 1,6-Addition of Aryl Boronic Acids to α,β,γ,δ-Unsaturated Carbonyl Compounds Catalyzed by an Iridium Complex. Angew Chem Int Ed Engl 2006; 45:5164-6. [PMID: 16819750 DOI: 10.1002/anie.200601719] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Sakyo, Kyoto 606-8502, Japan
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49
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Nishimura T, Yasuhara Y, Hayashi T. Highly Selective 1,6-Addition of Aryl Boronic Acids to α,β,γ,δ-Unsaturated Carbonyl Compounds Catalyzed by an Iridium Complex. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200601719] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Doherty S, Goodrich P, Hardacre C, Luo H, Nieuwenhuyzen M, Rath RK. Lewis Acid Platinum Complexes of Conformationally Flexible NUPHOS Diphosphines: Highly Efficient Catalysts for the Carbonyl−Ene Reaction. Organometallics 2005. [DOI: 10.1021/om0505716] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Simon Doherty
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
| | - Peter Goodrich
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
| | - Christopher Hardacre
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
| | - He−Kuan Luo
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
| | - Mark Nieuwenhuyzen
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
| | - Rakesh K. Rath
- Centre for the Theory and Applications of Catalysis, School of Chemistry, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland
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