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Noh HC, Kim CE, Lee K, Kim D, Lee PH. Iridium-Catalyzed Regioselective B(4)-Alkenylation and B(3,5)-Dialkenylation of o-Carboranes. Org Lett 2023; 25:6643-6648. [PMID: 37646852 DOI: 10.1021/acs.orglett.3c02410] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Iridium(I)-catalyzed regioselective B(4)-alkenylation has been developed from o-carboranyl sulfoxonium ylides and alkynes through B(4)-H activation. The sequential B(4)- and B(6)-alkenylation afforded B(3,5)-dialkenylated o-carboranyl sulfoxonium ylides in one pot. Eventually, two alkenyl groups, the same or different, were introduced at positions 3 and 5 of the carborane. Sulfoxonium ylide used as a directing group remains available for further functionalization and is converted to B-alkenylated o-carboranyl trichloromethyl ketones.
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Affiliation(s)
- Hee Chan Noh
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Cheol-Eui Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyungsup Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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Han GU, Kim S, Han SH, Maeng C, Ko GH, Lee K, Noh HC, Lee PH. Iridium(III)-Catalyzed C-H Cyclization of Sulfoximines with Diazo Meldrum's Acids for the Synthesis of Cyclic Sulfoximines. J Org Chem 2023; 88:11702-11711. [PMID: 37427877 DOI: 10.1021/acs.joc.3c00984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
Iridium(III)-catalyzed C-H cyclization of sulfoximines with diazo Meldrum's acid provided cyclic sulfoximines with a carbonyl group in good to excellent yields. These compounds were easily converted into unsubstituted and arylated sulfoximines. Moreover, the vinyl triflates obtained from the cyclic sulfoximines underwent palladium(II)-catalyzed cross-coupling reactions with a variety of aryl, arylalkynyl, and heteroatom (N and S) nucleophiles, affording a wide range of monosubstituted sulfoximines in high yields.
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Affiliation(s)
- Gi Uk Han
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Suhui Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sang Hoon Han
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Gi Hoon Ko
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyungsup Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hee Chan Noh
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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Park K, Han GU, Yoon S, Lee E, Noh HC, Lee K, Maeng C, Kim D, Lee PH. Iridium(III)-Catalyzed Regioselective B(4)-H Amination of o-Carboranes with Sufilimines. Org Lett 2023; 25:5989-5994. [PMID: 37540091 DOI: 10.1021/acs.orglett.3c02114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Iridium(III)-catalyzed regioselective B(4)-H amination is developed from the reaction of o-carborane acids with sulfilimines without any oxidants under mild conditions, which leads to a wide range of B(4)-H aminated o-carboranes in good yields with a broad substrate scope. Moreover, the selective B(3,6)-diamination reaction of the o-carborane acid was achieved. The present reaction is attractive from a practical point of view because dibenzothiophene is quantitatively recovered and reused.
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Affiliation(s)
- Kyeongna Park
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Gi Uk Han
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sugyeong Yoon
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Eunseo Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hee Chan Noh
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyungsup Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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Govindan K, Jayaram A, Duraisamy T, Chen NQ, Lin WY. Metal-Free N-H/C-H Carbonylation by Phenyl Isocyanate: Divergent Synthesis of Six-Membered N-Heterocycles. J Org Chem 2022; 87:8719-8729. [PMID: 35723982 DOI: 10.1021/acs.joc.2c01026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We disclose a method using phenyl isocyanate to synthesize carbonyl-containing N-heterocycles. The metal-free novel approach for both N-H and C-H carbonylation processes was successfully refined, delivering a range of synthetically valuable derivatives of quinazoline-2,4(1H,3H)-dione, 2H-benzo[e] [1,2,4] thiadiazin-3(4H)-one 1,1-dioxide, and pyrrolo[1,2-a] quinoxalin-4(5H)-one. The protocol features broad substrates with diverse reactions suitable for excellent yields, mild conditions, and good functional group compatibility. Moreover, the applicability of the reaction was characterized by gram-scale synthesis and synthetic transformations for drug molecules.
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Affiliation(s)
- Karthick Govindan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC
| | - Alageswaran Jayaram
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC
| | - Tamilselvan Duraisamy
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC
| | - Nian-Qi Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan, ROC.,Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, ROC
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Maeng C, Yun Y, Son JY, Lee PH. Palladium‐Catalyzed Oxidative Cyclization of Azulene‐2‐carboxylic Acids with 1,3‐Dienes for the Synthesis of Alkenyl Azulenolactones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Jeong-Yu Son
- Kangwon National University KOREA (THE REPUBLIC OF)
| | - Phil Ho Lee
- Kangwon National University KOREA (THE REPUBLIC OF)
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Maeng C, Lee PH. Synthesis of azulenolactones through sequential C(2)‐bromoarylation and intramolecular CO bond formation from azulene‐1‐carboxylic acids and di(2‐bromoaryl)iodonium salts in
one pot. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chanyoung Maeng
- Department of Chemistry Kangwon National University Chuncheon Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry Kangwon National University Chuncheon Republic of Korea
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Oseghale CO, Onisuru OR, Fapojuwo DP, Mogudi BM, Molokoane PP, Maqunga NP, Meijboom R. Alkali-modified heterogeneous Pd-catalyzed synthesis of acids, amides and esters from aryl halides using formic acid as the CO precursor. RSC Adv 2021; 11:26937-26948. [PMID: 35479992 PMCID: PMC9037739 DOI: 10.1039/d1ra05177f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 07/26/2021] [Indexed: 11/21/2022] Open
Abstract
To establish an environmentally friendly green chemical process, we minimized and resolved a significant proportion of waste and hazards associated with conventional organic acids and molecular gases, such as carbon monoxide (CO). Herein, we report a facile and milder reaction procedure, using low temperatures/pressures and shorter reaction time for the carboxyl- and carbonylation of diverse arrays of aryl halides over a newly developed cationic Lewis-acid promoted Pd/Co3O4 catalyst. Furthermore, the reaction proceeded in the absence of acid co-catalysts, and anhydrides for CO release. Catalyst reusability was achieved via scalable, safer, and practical reactions that provided moderate to high yields, paving the way for developing a novel environmentally benign method for synthesizing carboxylic acids, amides, and esters.
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Affiliation(s)
- Charles O Oseghale
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Oluwatayo Racheal Onisuru
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Dele Peter Fapojuwo
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Batsile M Mogudi
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Pule Petrus Molokoane
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Nomathamsanqa Prudence Maqunga
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
| | - Reinout Meijboom
- Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg PO Box 524, Auckland Park 2006 Johannesburg South Africa +27 11 559 2819 +27 72 894 0293
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