51
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Rivero AR, Kim BS, Walsh PJ. Palladium-Catalyzed Benzylic Arylation of Pyridylmethyl Silyl Ethers: One-Pot Synthesis of Aryl(pyridyl)methanols. Org Lett 2016; 18:1590-3. [PMID: 27004592 PMCID: PMC4887141 DOI: 10.1021/acs.orglett.6b00450] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An efficient palladium-catalyzed direct arylation of pyridylmethyl silyl ethers with aryl bromides is described. A Pd(OAc)2/NIXANTPHOS-based catalyst provides aryl(pyridyl)methyl alcohol derivatives in good to excellent yields (33 examples, 57-100% yield). This protocol is compatible with different silyl ether protecting groups, affording either the protected or the free alcohols in an effective one-pot process. The scalability of the reaction is demonstrated.
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Affiliation(s)
- Alexandra R. Rivero
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Byeong-Seon Kim
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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52
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Li M, González-Esguevillas M, Berritt S, Yang X, Bellomo A, Walsh PJ. Palladium-Catalyzed C-H Arylation of α,β-Unsaturated Imines: Catalyst-Controlled Synthesis of Enamine and Allylic Amine Derivatives. Angew Chem Int Ed Engl 2016; 55:2825-9. [PMID: 26846375 DOI: 10.1002/anie.201509757] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Indexed: 01/14/2023]
Abstract
A unique chemo- and regioselective α- and γ-arylation of palladium azapentadienyl intermediates is presented. Two distinct catalysts and sets of conditions successfully controlled the regioselectivity of the arylation. These methods provide the first umpolung C-H functionalization of azapentadienyl palladium intermediates and enable the divergent synthesis of allylic amine and enamine derivatives, which are of significant interest in the pharmaceutical industry.
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Affiliation(s)
- Minyan Li
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - María González-Esguevillas
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Simon Berritt
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Xiaodong Yang
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA.,Key Laboratory of Medicinal Chemistry for Natural Resource, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Ana Bellomo
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA.
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53
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Li M, González‐Esguevillas M, Berritt S, Yang X, Bellomo A, Walsh PJ. Palladium‐Catalyzed C−H Arylation of α,β‐Unsaturated Imines: Catalyst‐Controlled Synthesis of Enamine and Allylic Amine Derivatives. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509757] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Minyan Li
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - María González‐Esguevillas
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Simon Berritt
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Xiaodong Yang
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
- Key Laboratory of Medicinal Chemistry for Natural Resource School of Chemical Science and Technology Yunnan University Kunming 650091 P.R. China
| | - Ana Bellomo
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA USA
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54
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Gao F, Kim BS, Walsh PJ. Chemoselective Palladium-Catalyzed Deprotonative Arylation/[1,2]-Wittig Rearrangement of Pyridylmethyl Ethers. Chem Sci 2016; 7:976-983. [PMID: 27014434 PMCID: PMC4800319 DOI: 10.1039/c5sc02739j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/26/2015] [Indexed: 12/16/2022] Open
Abstract
Control of chemoselectivity is one of the most challenging problems facing chemists and is particularly important in the synthesis of bioactive compounds and medications. Herein, the first highly chemoselective tandem C(sp3)-H arylation/[1,2]-Wittig rearrangement of pyridylmethyl ethers is presented. The efficient and operationally simple protocols enable generation of either arylation products or tandem arylation/[1,2]-Wittig rearrangement products with remarkable selectivity and good to excellent yields (60-99%). Choice of base, solvent, and reaction temperature play a pivotal role in tuning the reactivity of intermediates and controlling the relative rates of competing processes. The novel arylation step is catalyzed by a Pd(OAc)2/NIXANTPHOS-based system via a deprotonative cross-coupling process. The method provides rapid access to skeletally diverse aryl(pyridyl)methanol core structures, which are central components of several medications.
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Affiliation(s)
- Feng Gao
- Department of Medicinal Plants , Agronomy College , Sichuan Agricultural University , 211, Huimin Rd, Wenjiang Region , Chengdu 611130 , PR China
- Roy and Diana Vagelos Laboratories , Penn/Merck Laboratory for High-Throughput Experimentation , Department of Chemistry , University of Pennsylvania , 231 S, 34th St. , Philadelphia , PA 19104-6323 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Byeong-Seon Kim
- Roy and Diana Vagelos Laboratories , Penn/Merck Laboratory for High-Throughput Experimentation , Department of Chemistry , University of Pennsylvania , 231 S, 34th St. , Philadelphia , PA 19104-6323 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories , Penn/Merck Laboratory for High-Throughput Experimentation , Department of Chemistry , University of Pennsylvania , 231 S, 34th St. , Philadelphia , PA 19104-6323 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
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55
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Cao X, Sha SC, Li M, Kim BS, Morgan C, Huang R, Yang X, Walsh PJ. Nickel-Catalyzed Arylation of Heteroaryl-containing Diarylmethanes: Exceptional Reactivity of the Ni(NIXANTPHOS)-based Catalyst. Chem Sci 2016; 7:611-618. [PMID: 27213035 PMCID: PMC4869726 DOI: 10.1039/c5sc03704b] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 10/07/2015] [Indexed: 01/07/2023] Open
Abstract
Nickel(0)-catalyzed cross-coupling of heteroaryl-containing diarylmethanes with both aryl bromides and chlorides has been achieved. The success of this reaction relies on the introduction of a unique nickel/NIXANTPHOS-based catalyst system, which provides a direct route to triarylmethanes from heteroaryl-containing diarylmethanes. Reactivity studies indicate the Ni(NIXANTPHOS)-based catalyst exhibits enhanced reactivity over XANTPHOS derivatives and other Ni(phosphine)-based catalysts in the reactions examined.
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Affiliation(s)
- Xinyu Cao
- Key Laboratory of Cluster Science of Ministry of Education , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , PR China
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Sheng-Chun Sha
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Minyan Li
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Byeong-Seon Kim
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Catherine Morgan
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
| | - Rudan Huang
- Key Laboratory of Cluster Science of Ministry of Education , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , PR China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource , School of Chemical Science and Technology , Yunnan University , Kunming , 650091 , PR China
| | - Patrick J. Walsh
- Department of Chemistry , University of Pennsylvania , 231 S. 34th St. , Philadelphia , PA 19104 , USA . ; https://sites.google.com/site/titaniumupenn/ ; Fax: +1-215-573-6743
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56
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Kim BS, Jiménez J, Gao F, Walsh PJ. Palladium-Catalyzed Benzylic C-H Arylation of Azaarylmethylamines. Org Lett 2015; 17:5788-5791. [PMID: 26576005 DOI: 10.1021/acs.orglett.5b02898] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A direct C-H functionalization approach to produce aryl(azaaryl)methylamines from azaarylmethylamines without directing groups is described. Under conditions where the azaarylmethylamines' C-H is reversibly deprotonated, a Pd(OAc)(2)/NIXANTPHOS-based catalyst couples the resulting carbanions with various aryl halides to provide aryl(azaaryl)methylamines. This umpolung strategy directly provides tertiary amines without protecting or activating groups.
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Affiliation(s)
- Byeong-Seon Kim
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Jacqueline Jiménez
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
| | - Feng Gao
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Department of Medicinal Plants, Agronomy College, Sichuan Agricultural University, 211 Huimin Roadd, Wenjiang Region, Chengdu 611130, PR China
| | - Patrick J Walsh
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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57
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Hussain N, Kim BS, Walsh PJ. Palladium-catalyzed C(sp(3))-H Arylation of N-Boc benzylalkylamines via a deprotonative cross-coupling process. Chemistry 2015; 21:11010-3. [PMID: 26129922 DOI: 10.1002/chem.201502017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Indexed: 12/16/2022]
Abstract
Diarylmethylamines are key intermediates and products in the pharmaceutical industry. Herein we disclose a novel method toward the synthesis of these important compounds via CH functionalization. Presented is a reversible deprotonation of N-Boc benzylalkylamines at the benzylic CH with in situ arylation by a NiXantPhos-based palladium catalyst (50-93 % yield, 29 examples). The method is also successful with N-Boc-tetrahydroisoquinolines. The advantages of this method are it avoids strong bases, low temperatures, and the need to transmetallate to main group metals for the coupling.
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Affiliation(s)
- Nusrah Hussain
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html
| | - Byeong-Seon Kim
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html
| | - Patrick J Walsh
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html.
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58
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Tang S, Park JY, Yeagley AA, Sabat M, Chruma JJ. Decarboxylative Generation of 2-Azaallyl Anions: 2-Iminoalcohols via a Decarboxylative Erlenmeyer Reaction. Org Lett 2015; 17:2042-5. [DOI: 10.1021/acs.orglett.5b00107] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Shaojian Tang
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Jong Yeun Park
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Andrew A. Yeagley
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Michal Sabat
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Jason J. Chruma
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
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