1
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Karakaya I, Rizwan K, Munir S. Transition‐Metal Catalyzed Coupling Reactions for the Synthesis of (Het)aryl Ketones: An Approach from their Synthesis to Biological Perspectives. ChemistrySelect 2023. [DOI: 10.1002/slct.202204005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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2
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Li Q, Zhang W, Zhu C, Pan H, Shi KY, Zhang Y, Han MY, Tan CH. Organobase-Catalyzed Umpolung of Amides: The Generation and Transfer of Carbamoyl Anion. J Org Chem 2023; 88:1245-1255. [PMID: 36628963 DOI: 10.1021/acs.joc.2c02487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel organobase-catalyzed umpolung reaction of amides was disclosed. This method provides an efficient method to generate and transfer carbamoyl anions. In this transformation, some of the inherent disadvantages of carbamoyl metal were avoided. The mechanistic analysis revealed that the reaction proceeds through polarity inversion of amide, and various carbamoyl anions were applied in the reaction. Moreover, a wide range of substrates was achieved with moderate to excellent yield.
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Affiliation(s)
- Qi Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Wang Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Chen Zhu
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Hong Pan
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Kang-Yue Shi
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Man-Yi Han
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, College of Chemistry and Materials Science, Huabei Normal University, Huaibei, Anhui 235000, PR China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
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3
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Majhi J, Zhou B, Zhuang Y, Tom MJ, Dai H, Evans PA. Palladium-Catalyzed Cross-Coupling of Cyanohydrins with Aryl Bromides: Construction of Biaryl Ketones. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1850-3687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The palladium-catalyzed cross-coupling of the lithium anion of aryl tert-butyldimethylsilyl protected cyanohydrins with aryl bromides followed by in situ deprotection with fluoride ion provides a convenient and versatile approach to biaryl ketones. This protocol represents the first example of a palladium-catalyzed arylation of a cyanohydrin, which functions as an acyl anion equivalent. Hence, in contrast to classical cross-coupling reactions, the pronucleophile component is incorporated in the product to permit further functionalization. We then highlight the synthetic utility of the new method with applications to bioactive biaryl ketones and the construction of a triaryl diketone that was used to prepare an extended tetrathiafulvalene.
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Affiliation(s)
- Jadab Majhi
- Chemistry, Queen’s University, Kingston, Canada
| | - Bohang Zhou
- Chemistry, Queen’s University, Kingston, Canada
| | | | - Mai-Jan Tom
- Chemistry, Queen’s University, Kingston, Canada
| | - Huifang Dai
- School of Pharmacy, Fudan University, Shanghai, China
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4
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Roscales S, Csáky AG. Synthesis of Ketones by C−H Functionalization of Aldehydes with Boronic Acids under Transition‐Metal‐Free Conditions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar Universidad Complutense Campus de Excelencia Internacional Moncloa Paseo de Juan XXIII, 1 28040 Madrid Spain
| | - Aurelio G. Csáky
- Instituto Pluridisciplinar Universidad Complutense Campus de Excelencia Internacional Moncloa Paseo de Juan XXIII, 1 28040 Madrid Spain
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5
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Roscales S, Csáky AG. Synthesis of Ketones by C-H Functionalization of Aldehydes with Boronic Acids under Transition-Metal-Free Conditions. Angew Chem Int Ed Engl 2021; 60:8728-8732. [PMID: 33476411 DOI: 10.1002/anie.202015835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/30/2020] [Indexed: 12/11/2022]
Abstract
A method for the synthesis of ketones from aldehydes and boronic acids via a transition-metal-free C-H functionalization reaction is reported. The method employs nitrosobenzene as a reagent to drive the simultaneous activation of the boronic acid as a boronate and the activation of the C-H bond of the aldehyde as an iminium species that triggers the key C-C bond-forming step via an intramolecular migration from boron to carbon. These findings constitute a practical, scalable, and operationally straightforward method for the synthesis of ketones.
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Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, Paseo de Juan XXIII, 1, 28040, Madrid, Spain
| | - Aurelio G Csáky
- Instituto Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, Paseo de Juan XXIII, 1, 28040, Madrid, Spain
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6
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Donabauer K, Murugesan K, Rozman U, Crespi S, König B. Photocatalytic Reductive Radical-Polar Crossover for a Base-Free Corey-Seebach Reaction. Chemistry 2020; 26:12945-12950. [PMID: 32686166 PMCID: PMC7589390 DOI: 10.1002/chem.202003000] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/15/2020] [Indexed: 01/07/2023]
Abstract
A metal-free generation of carbanion nucleophiles is of prime importance in organic synthesis. Herein we report a photocatalytic approach to the Corey-Seebach reaction. The presented method operates under mild redox-neutral and base-free conditions giving the desired product with high functional group tolerance. The reaction is enabled by the combination of photo- and hydrogen atom transfer (HAT) catalysis. This catalytic merger allows a C-H to carbanion activation by the abstraction of a hydrogen atom followed by radical reduction. The generated nucleophilic intermediate is then capable of adding to carbonyl electrophiles. The obtained dithiane can be easily converted to the valuable α-hydroxy carbonyl in a subsequent step. The proposed reaction mechanism is supported by emission quenching, radical-radical homocoupling and deuterium labeling studies as well as by calculated redox-potentials and bond strengths.
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Affiliation(s)
- Karsten Donabauer
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Kathiravan Murugesan
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Urša Rozman
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Stefano Crespi
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Burkhard König
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
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7
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Trongsiriwat N, Pu Y, Nieves‐Quinones Y, Shelp RA, Kozlowski MC, Walsh PJ. Reactions of 2‐Aryl‐1,3‐Dithianes and [1.1.1]Propellane. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905531] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nisalak Trongsiriwat
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Youge Pu
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
- College of ChemistryNankai University Tianjin 300071 P. R. China
| | - Yexenia Nieves‐Quinones
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Russell A. Shelp
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Marisa C. Kozlowski
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Patrick J. Walsh
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia PA USA
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8
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Trongsiriwat N, Pu Y, Nieves-Quinones Y, Shelp RA, Kozlowski MC, Walsh PJ. Reactions of 2-Aryl-1,3-Dithianes and [1.1.1]Propellane. Angew Chem Int Ed Engl 2019; 58:13416-13420. [PMID: 31291500 DOI: 10.1002/anie.201905531] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 06/17/2019] [Indexed: 01/08/2023]
Abstract
Bicyclo[1.1.1]pentanes (BCPs) have sparked the interest of medicinal chemists due to their recent discovery as bioisosteres of aromatic rings. To study the biological activity of this relatively new class of bioisosteres, reliable methods to incorporate BCPs into target molecules are in high demand, as reflected by a flurry of methods for BCP synthesis in recent years. In this work, we disclose a general method for the synthesis of BCP-containing dithianes which, upon deprotection, provide access to BCP analogues of medicinally abundant diarylketones. A broad scope of 2-aryl-1,3-dithianes, including several heterocyclic derivatives, react with [1.1.1]propellane to afford 26 new derivatives in good to excellent yields. Further transformation of the dithiane portion into a variety of functional groups demonstrates the robustness of the products. A computational study indicates that the reaction of 2-aryl-1,3-dithianes and [1.1.1]propellane proceeds via a two-electron pathway.
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Affiliation(s)
- Nisalak Trongsiriwat
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Youge Pu
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA.,College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yexenia Nieves-Quinones
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Russell A Shelp
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Marisa C Kozlowski
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, USA
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9
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Liu YF, Zheng L, Zhai DD, Zhang XY, Guan BT. Dimeric Potassium Amide-Catalyzed α-Alkylation of Benzyl Sulfides and 1,3-Dithianes. Org Lett 2019; 21:5351-5356. [DOI: 10.1021/acs.orglett.9b01994] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Shi H, Dixon DJ. Dithiane-directed Rh(iii)-catalyzed amidation of unactivated C(sp 3)-H bonds. Chem Sci 2019; 10:3733-3737. [PMID: 31015917 PMCID: PMC6457195 DOI: 10.1039/c8sc05225e] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 02/18/2019] [Indexed: 11/21/2022] Open
Abstract
An oxidant-free Rh(iii)-catalyzed direct amidation of alkyl dithianes via C(sp3)-H bond activation utilizing diverse and robust dioxazolone reagents is reported. The reaction hinges on use of a Cp*Rh(iii) complex in combination with an essential amino-carboxylate additive to generate usefully protected 1,3-aminoaldehyde derivatives. The scalability of the reaction was demonstrated as was a series of downstream product functionalizations, including dithiane deprotection, anion alkylation and reductive desulfurization, highlighting the general applicability of this transformation in the synthesis of novel scaffolds and building blocks.
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Affiliation(s)
- Heyao Shi
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford , OX1 3TA , UK .
| | - Darren J Dixon
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford , OX1 3TA , UK .
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11
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Trongsiriwat N, Li M, Pascual‐Escudero A, Yucel B, Walsh PJ. Palladium‐Catalyzed Allylic Alkylation of 2‐Aryl‐1,3‐Dithianes, an Umpolung Synthesis of β,γ‐Unsaturated Ketones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nisalak Trongsiriwat
- Department of Chemistry University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Minyan Li
- Department of Chemistry University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Ana Pascual‐Escudero
- Dpto. Química Orgánica, Facultad de Ciencias Universidad Autónoma de Madrid Madrid Spain
| | - Baris Yucel
- Istanbul Technical University, Science Faculty Department of Chemistry, Maslak 34469 Istanbul Turkey
| | - Patrick J. Walsh
- Department of Chemistry University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
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12
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Abstract
This review highlights the use of the bisphosphine ligand group in homogeneous catalysis.
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13
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Yao K, Liu D, Yuan Q, Imamoto T, Liu Y, Zhang W. 1,3-Dithianes as Acyl Anion Equivalents in Pd-Catalyzed Asymmetric Allylic Substitution. Org Lett 2016; 18:6296-6299. [DOI: 10.1021/acs.orglett.6b03161] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kun Yao
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Delong Liu
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Qianjia Yuan
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Tsuneo Imamoto
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yangang Liu
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Wanbin Zhang
- School
of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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14
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Schmink JR, Dockrey SAB, Zhang T, Chebet N, van Venrooy A, Sexton M, Lew SI, Chou S, Okazaki A. Palladium-Catalyzed Synthesis of Aryl Vinyl Sulfides via 1,3-Oxathiolanes As Vinyl Sulfide Surrogates. Org Lett 2016; 18:6360-6363. [DOI: 10.1021/acs.orglett.6b03249] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jason R. Schmink
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Summer A. Baker Dockrey
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Tianyi Zhang
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Naomi Chebet
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Alexis van Venrooy
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Mary Sexton
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Sarah I. Lew
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Steffany Chou
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
| | - Ami Okazaki
- Department of Chemistry, Bryn Mawr College, 101 North Merion Avenue, Bryn Mawr, Pennsylvania 19010-2899, United States
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15
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Jiménez J, Kim BS, Walsh PJ. Tandem C(sp 3)-H Arylation/Oxidation and Arylation/Allylic Substitution of Isoindolinones. Adv Synth Catal 2016; 358:2829-2837. [PMID: 28652858 PMCID: PMC5482541 DOI: 10.1002/adsc.201600654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Isoindolinones comprise an important class of medicinally active compounds. Herein we report a straightforward functionalization of the isoindolinones with aryl bromides (22 examples) using a Pd(OAc)2/NIXANTPHOS-based catalyst system. Additionally 3-aryl 3-hydroxy isoindolinone derivatives, which exhibit anti-tumor activity, can be accessed via a tandem reaction. Thus, when the arylation product is exposed to air under basic conditions, in situ oxidation takes place to install the 3-hydroxyl group. Furthermore, a tandem arylation/allylic substitution reaction is advanced in which both the arylation and allylic substitution are catalyzed by the same palladium catalyst. Finally, a tandem arylation/alkylation procedure is presented. These tandem reactions enable the synthesis of a variety of structurally diverse isoindolinone derivatives from common starting materials.
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Affiliation(s)
- Jacqueline Jiménez
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
| | - Byeong-Seon Kim
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
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16
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Li M, Yucel B, Jiménez J, Rotella M, Fu Y, Walsh PJ. Umpolung Synthesis of Diarylmethylamines via Palladium-Catalyzed Arylation of N-Benzyl Aldimines. Adv Synth Catal 2016; 358:1910-1915. [PMID: 28190996 DOI: 10.1002/adsc.201600075] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An umpolung synthesis of diarylmethylamine derivatives is presented. This reaction entails a Pd catalyzed arylation of 1,3-diaryl-2-azaallyl anions, in situ generated from N-benzyl aldimines. A Pd(NIXANTPHOS)-based catalyst together with hindered silylamide bases enabled the coupling of aldimines with aryl bromides in good to excellent yields without product isomerization. Moreover, regioselectivity in the arylation of unsymmetrical 1,3-diaryl-2-azaallyl anions was studied. This method is suitable for a gram scale synthesis of diarylmethylamine derivatives at room temperature without use of a glovebox.
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Affiliation(s)
- Minyan Li
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Baris Yucel
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Istanbul Technical University, Science Faculty, Department of Chemistry, Maslak 34469, Istanbul, Turkey
| | - Jacqueline Jiménez
- Roy and Diana Vagelos Laboratories, 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, Av. San Claudio y 14 Sur, Puebla, Pue 72570, México
| | - Madeline Rotella
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Yue Fu
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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17
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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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18
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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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19
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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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20
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Abidi N, Schmink JR. Synthesis of Disubstituted Dithioethers: tert-Butoxide Promoted Elimination/Ring Opening of 1,3-Dithianes Followed by Palladium-Catalyzed C–S Bond Formation. J Org Chem 2015; 80:4123-31. [DOI: 10.1021/acs.joc.5b00547] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nissa Abidi
- Department
of Chemistry, Bryn Mawr College, 101 N. Merion Avenue, Bryn Mawr, Pennsylvania 19010, United States
| | - Jason R. Schmink
- Department
of Chemistry, Bryn Mawr College, 101 N. Merion Avenue, Bryn Mawr, Pennsylvania 19010, United States
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21
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Unoh Y, Hirano K, Satoh T, Miura M. Rhodium(III)-Catalyzed Oxidative Alkenylation of 1,3-Dithiane-Protected Arenecarbaldehydes via Regioselective C–H Bond Cleavage. Org Lett 2015; 17:704-7. [DOI: 10.1021/ol503722r] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yuto Unoh
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koji Hirano
- 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
- JST, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Masahiro Miura
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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