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Dalal A, Bodak S, Babu SA. Picolinamide-assisted ortho-C-H functionalization of pyrenylglycine derivatives using aryl iodides. Org Biomol Chem 2024; 22:1279-1298. [PMID: 38258893 DOI: 10.1039/d3ob01731a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Chemical transformations involving the pyrenylglycine motif (an unnatural amino acid) and practical methods toward it are seldom known. This work aimed at developing a method for synthesizing novel pyrenylglycine (pyrene-based glycine) unnatural amino acid derivatives. To realize this, initially, a new pyrenylglycine substrate possessing the picolinamide moiety was assembled via the Ugi multicomponent reaction. The picolinamide moiety linked to amine substrates is a well-known bidentate directing group for accomplishing the site-selective γ-C-H functionalization of amines. Subsequently, it was aimed at using a Pd(II)-catalyzed bidentate directing group-aided γ-C-H arylation strategy for generating a wide range of unprecedented examples of C(2)-H arylated pyrenylglycines. Accordingly, pyrenylglycine possessing the picolinamide moiety was subjected to Pd(II)-catalyzed C(2)-H arylation in the non-K-region to afford a library of C(2)-arylated pyrenylglycines (π-extended pyrenes). Additionally, pyrenylglycine-based small peptides were assembled using C(2)-arylated pyrenylglycines. The X-ray structure of a representative compound was obtained, which corroborated the structure of pyrenylglycine and the regioselectivity of C(2)-H arylation of the pyrene in the non-K-region.
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Affiliation(s)
- Arup Dalal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Subhankar Bodak
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
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2
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Liu SC, Fang DC. DFT Studies on the Mechanisms of Carboamination/Diamination of Unactivated Alkenes Mediated by Pd(IV) Intermediates. J Org Chem 2023; 88:14540-14549. [PMID: 37773964 DOI: 10.1021/acs.joc.3c01561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2023]
Abstract
Density functional theory (DFT) calculations have been employed to investigate the mechanism of carboamination and diamination of unactivated alkenes mediated by Pd(IV) intermediates. Both reactions share a common Pd(IV) intermediate, serving as the starting point for either the carboamination or the diamination pathway. The formation of this Pd(IV) intermediate encompasses a transition state that substantially impacts the turnover frequency (TOF) of catalytic cycles, with an apparent activation free-energy barrier of 26.1 kcal mol-1. Carboamination of unactivated alkenes proceeds through the coordination of a toluene molecule, C-H activation, inner reductive elimination, and the separation of the carboamination product from this intermediate, while diamination of unactivated alkenes involves the formation of the ion nucleophile, SN2 attack, and the separation of the diamination product. A comparison of the free-energy profiles for carboamination and diamination of unactivated alkenes can elucidate the origin of the chemoselectivity, and Bader's atoms in molecules (AIM) wave function analyses have been performed to analyze the contributions of the outer C-N bonding in the diamination process.
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Affiliation(s)
- Si-Cong Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - De-Cai Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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3
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Halder P, Talukdar V, Iqubal A, Das P. Palladium-Catalyzed Aminocarbonylation of Isoquinolines Utilizing Chloroform-COware Chemistry. J Org Chem 2022; 87:13965-13979. [PMID: 36217780 DOI: 10.1021/acs.joc.2c01629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The carbonyl group forms an integral part of several drug molecules and materials; hence, synthesis of carbonylated compounds remains an intriguing area of research for synthetic and medicinal chemists. Handling toxic CO gas has several limitations; thus, using safe and effective techniques for in or ex situ generation of carbon monoxide from nontoxic and cheap precursors is highly desirable. Among several precursors that have been explored for the generation of CO gas, chloroform can prove to be a promising CO surrogate due to its cost-effectiveness and ready availability. However, the one-pot chloroform-based carbonylation reaction requires strong basic conditions for hydrolysis of chloroform that may affect functional group tolerability of substrates and scale-up reactions. These limitations can be overcome by a two-chamber reactor (COware) that can be utilized for ex situ CO generation through hydrolysis of chloroform in one chamber and facilitating safe carbonylation reactions in another chamber under mild conditions. The versatility of this "Chloroform-COware" technique is explored through palladium-catalyzed aminocarbonylation of medicinally relevant heterocyclic cores, viz., isoquinoline and quinoline.
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Affiliation(s)
- Pallabi Halder
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India
| | - Vishal Talukdar
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India
| | - Ashif Iqubal
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India
| | - Parthasarathi Das
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India
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4
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Yao Y, Su S, Wu N, Wu W, Jiang H. The cobalt( ii)-catalyzed acyloxylation of picolinamides with bifunctional silver carboxylate via C–H bond activation. Org Chem Front 2022. [DOI: 10.1039/d2qo01131j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cobalt(ii)-catalyzed C–H bond acyloxylation of picolinamides with bifunctional silver carboxylate has been developed. The mild and practical esterification provides an atom-economic route to access to polysubstituted naphthalene compounds.
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Affiliation(s)
- Yongqi Yao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510641 Guangzhou, People's Republic of China
| | - Shaoting Su
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510641 Guangzhou, People's Republic of China
| | - Nan Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510641 Guangzhou, People's Republic of China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510641 Guangzhou, People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510641 Guangzhou, People's Republic of China
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5
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Joshi A, Singh S, Iqbal Z, De SR. CO free esterifications of (Hetero)arenes via transition-metal-catalyzed chelation-induced C–H activation: Recent updates. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Zuo B, Shao H, Qu E, Ma Y, Li W, Huang M, Deng Q. An Alkoxy Modified
N
‐Heterocyclic Carbene‐Palladacycle: Synthesis, Characterization and Application towards Buchwald‐Hartwig and Suzuki‐Miyaura Coupling Reactions. ChemistrySelect 2021. [DOI: 10.1002/slct.202102733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bin Zuo
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Han Shao
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Erdong Qu
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Yunhua Ma
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Wanfang Li
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Mingxian Huang
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
| | - Qinyue Deng
- School of Materials and Chemistry University of Shanghai for Science and Technology 334 Jungong Road Shanghai 200093 China
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Urruzuno I, Andrade-Sampedro P, Correa A. Late-Stage C-H Acylation of Tyrosine-Containing Oligopeptides with Alcohols. Org Lett 2021; 23:7279-7284. [PMID: 34477386 PMCID: PMC8453636 DOI: 10.1021/acs.orglett.1c02764] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Indexed: 12/13/2022]
Abstract
The selective tagging of amino acids within a peptide framework while using atom-economical C-H counterparts poses an unmet challenge within peptide chemistry. Herein, we report a novel Pd-catalyzed late-stage C-H acylation of a collection of Tyr-containing peptides with alcohols. This water-compatible labeling technique is distinguished by its reliable scalability and features the use of ethanol as a renewable feedstock for the assembly of a variety of peptidomimetics.
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Affiliation(s)
- Iñaki Urruzuno
- Department
of Organic Chemistry I, University of the
Basque Country (UPV/EHU), Joxe Mari Korta
R&D Center, Avenida Tolosa 72, 20018 Donostia-San Sebastián, Spain
| | - Paula Andrade-Sampedro
- Department
of Organic Chemistry I, University of the
Basque Country (UPV/EHU), Joxe Mari Korta
R&D Center, Avenida Tolosa 72, 20018 Donostia-San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
| | - Arkaitz Correa
- Department
of Organic Chemistry I, University of the
Basque Country (UPV/EHU), Joxe Mari Korta
R&D Center, Avenida Tolosa 72, 20018 Donostia-San Sebastián, Spain
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8
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Correa A. Metal‐Catalyzed C(sp
2
)−H Functionalization Processes of Phenylalanine‐ and Tyrosine‐Containing Peptides. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Arkaitz Correa
- University of the Basque Country (UPV/EHU) Department of Organic Chemistry I Joxe Mari Korta R&D Center Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
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