1
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Chen Y, Zhang S, Li Y, Li T, Ma Q, Yuan Y, Jia X. CBr 4 as a Mild Oxidant-Enabled Oxidation of a sp 3 C-H Bond: A Facile Synthesis of the Persistent Iminium Salts of Tetrahydroisoquinolines. Chemistry 2024; 30:e202303952. [PMID: 38193608 DOI: 10.1002/chem.202303952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/26/2023] [Accepted: 01/04/2024] [Indexed: 01/10/2024]
Abstract
Using CBr4 as a mild oxidant, the direct C-H bond oxidation of N-aryltetrahydroisoquinolines was achieved, giving a series of the corresponding iminium salts in high yields under metal- and photo-free reaction conditions. This reaction is superior in high yields and good functional group tolerance, and the late-stage derivatization showed that these iminium salts can readily be applied to the synthesis of the functionalized THIQs.
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Affiliation(s)
- Yuqin Chen
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Shuwei Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Yuemei Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Tong Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Qiyuan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Yu Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Xiaodong Jia
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
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2
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Chen Y, Zhang S, Li T, Ma Q, Yuan Y, Jia X. Oxidants Controlled C-H Bond Functionalization of N-Aryltetrahydroisoquinolines: The Construction of the Quaternary Carbon Center and Cleavage of the C-N Bond. Chemistry 2024; 30:e202303151. [PMID: 37875461 DOI: 10.1002/chem.202303151] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/22/2023] [Accepted: 10/24/2023] [Indexed: 10/26/2023]
Abstract
Initiated by triarylamine radical cation salt (TBPA), the direct C-H bond functionalization of α-N-aryltetrahydroisoquinoline esters was smoothly realized, giving a series of α-hydroxylated derivatives with a quaternary carbon center in good yields. Differently, in the presence of tert-butyl nitrite (TBN), the C-N single bond was cleaved to keto esters. The mechanistic study revealed that these reactions were mediated by a similar mechanism, in which the N-nitrosation might provide a driving force to the C-N bond cleavage.
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Affiliation(s)
- Yuqin Chen
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Shuwei Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Tong Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Qiyuan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Yu Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Xiaodong Jia
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
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3
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Das A, Jonathan C, Saha R, Ahmed MI, Bhowmik S. Regioselective Decarboxylative Transformations of Tetrahydro-β-carboline-1-carboxylic Acid: Reagent Controlled Selectivity toward Alkynylated or Enaminone Products. Org Lett 2023; 25:7310-7315. [PMID: 37791996 DOI: 10.1021/acs.orglett.3c02636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
A one-pot, regioselective decarboxylative alkynylation of tetrahydro-β-carboline-1-carboxylic acid under peroxide-free condition is reported. The reaction is highly selective for the 1-position over the 3-position of tetrahydro-β-carboline. The reaction can afford alkynylated or enaminone products depending on the reagent. The reaction proceeds through sequential decarboxylative iminium ion formation followed by an alkynylation and oxidative rearrangement cascade.
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Affiliation(s)
- Arka Das
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Christine Jonathan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Rana Saha
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Md Imran Ahmed
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Subhendu Bhowmik
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
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4
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Filipović A, Džambaski Z, Bondžić AM, Bondžić BP. Visible-light promoted photoredox catalysis in flow: addition of biologically important α‑amino radicals to michael acceptors. Photochem Photobiol Sci 2023; 22:2259-2270. [PMID: 37340217 DOI: 10.1007/s43630-023-00448-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 06/08/2023] [Indexed: 06/22/2023]
Abstract
Visible light promoted photoredox catalyzed formation of α-amino radicals from cyclic tertiary amine compounds and their subsequent addition to Michael acceptors performed in flow conditions allowed access to a wide range of functionalized N-aryl-substituted tetrahydroisoquinolines (THIQs) and N-aryl-substituted tetrahydro-β-carbolines (THBCs). Visible light in conjunction with Ru(bpy)3Cl2 photocatalyst allowed the formation and high reactivities of α-amino radicals in flow conditions at room temperature. These reactions gave valuable products with high efficiencies; some previously unavailable reaction pathways photo or thermal reaction conditions; i.e. direct synthesis of 1-substituted (THBCs) via α-amino radical path were successfully realized in flow. The use of custom-made FEP tube microreactor proved to be the key to succesfull α-amino-radical formation and overall reaction performance in flow. Three types of light transparent custom-made microfluidic devices were tested, among them glass/silicon and FEP type reactor showed very good results in the conversion of tested compounds. Plausible reaction mechanism is proposed in accordance with known principles of photo activation of tertiary amines. Visible light promoted C(sp3)-H functionalization of N-aryl-protected tetrahydroisoquinolines and N-aryl-protected tetrahydro-β-carbolines in microflow conditions via a-amino radical pathway with various coupling partners in excellent yields and efficiencies.
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Affiliation(s)
- Ana Filipović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia
| | - Zdravko Džambaski
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia
| | - Aleksandra M Bondžić
- Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000, Belgrade, Serbia
| | - Bojan P Bondžić
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia.
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5
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Sun Z, Zhang S, Ma Q, Li Y, Ding H, Yuan Y, Jia X. Tert-Butyl Nitrite-initiated C-N Bond Cleavage of 1-Nitromethyl-N-aryltetrahydroisoquinolines: Synthesis of Furoxans with N-NO Skeleton. Chem Asian J 2023; 18:e202201265. [PMID: 36655414 DOI: 10.1002/asia.202201265] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/20/2023]
Abstract
A series of furoxan derivatives with N-nitroso groups were synthesized in good yields by TBN initiated radical sp3 C-N bond cleavage of 1-nitromethyl-N-aryltetrahydroisoquinolines. This reaction grafts the biologically important furoxan skeleton and N-nitroso group into on molecule, greatly improving the molecular complexity in one step transformation. The mechanistic study shows that this reaction is mediated by the in situ generated α-carbonyl nitrile oxide, which is afforded by TBN promoted C-N bond cleavage.
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Affiliation(s)
- Zheng Sun
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Shuwei Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Qiyuan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Yuemei Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Han Ding
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Yu Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
| | - Xiaodong Jia
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, 225002, Yangzhou, Jiangsu, P. R. China
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6
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Kubanaliev T, Eroglu Z, Ozer MS, Metin Ö. The effect of N-vacancy on the photocatalytic activity of graphitic carbon nitride in the oxidative Mannich reaction. Catal Sci Technol 2023. [DOI: 10.1039/d3cy00046j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
N-vacancy g-CN was used in Mannich oxidative reaction as a photocatalyst, having mid-gap states that enhance reaction kinetics. This facile photocatalyst enabled successful formation of challenging THIQ with EWG and chemo-selectivity on C–C bond.
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7
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Organocatalytic Synthesis of α-Aminonitriles: A Review. Catalysts 2022. [DOI: 10.3390/catal12101149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
α-Aminonitriles, which have anticancer, antibacterial, antiviral, and antifungal properties, have played an important role in pharmacology. Furthermore, they can also be used to synthesize natural and unnatural amino acids. The main bottleneck in the commercialization of these products is their large-scale production with controlled chirality. A variety of methods have been used to synthesize α-aminonitriles. Among other reported methods for preparing α-aminonitriles, the Strecker reaction is considered appropriate. Recent developments, however, have enabled the α-cyanation of tertiary and secondary amines by functionalizing the carbon–hydrogen (C–H) bond as an attractive alternative procedure for the preparation of α-aminonitriles in the presence of an oxidant and a cyanide source. In most cases, these reactions are catalyzed by transition metal catalysts, such as Fe, Cu, Rh, V, Au, Ru, Mo, Pt, Re, and Co, or by photocatalysts. As an alternative, organocatalysts can also be used to produce aminonitriles. Although there have been numerous reviews on the preparation of α-aminonitriles, no such reviews have been published specifically on the organocatalyzed synthesis of α-aminonitriles. Organocatalysis plays a significant role in synthesizing α-aminonitriles via Strecker-type reactions and cross dehydrogenative coupling reactions (CDC). In this mini review, we discuss the organocatalyzed synthesis of these molecules. A review of new organocatalysts for the synthesis of aminonitriles is expected to provide insight into the development of new industrial catalysts.
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8
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Aryal P, Rafiu R, Reddy VP. Acetic Acid-Promoted Photoredox Catalyzed Trifluoromethylation of Aldehyde Hydrazones. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.110003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Wang Y, Yang M, Lao C, Jiang Z. Potassium-Base-Mediated Autoxidative Diastereoselective Homocoupling of N-Acyl-2-aminoacetophenones. Org Lett 2022; 24:2625-2629. [PMID: 35380842 DOI: 10.1021/acs.orglett.2c00618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We herein report a general and highly efficient method for the synthesis of dl-2,3-diamide-1,4-diones via autoxidative dehydrogenative homocoupling of N-acyl-2-aminoacetophenones mediated by t-BuOK. The transformation is mild, operationally simple, and environmentally friendly. Control experiments and stereochemical results suggest that the substrate undergoes autoxidation followed by a diastereoselective SN2 reactopm.
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Affiliation(s)
- Yingwei Wang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Mingrong Yang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Chichou Lao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Zhihong Jiang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
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10
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Payra S, Yadav N, Moorthy JN. Solvent-mediated switching between oxidative addition and addition–oxidation: access to β-hydroxysulfides and β-arylsulfones by the addition of thiols to olefins in the presence of Oxone. NEW J CHEM 2022. [DOI: 10.1039/d1nj04892a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent-switching allows formation of either β-hydroxy-2-arylethyl aryl sulfides or 2-arylethyl aryl sulfones exclusively in thiol–ene ‘click’ reactions conducted with Oxone.
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Affiliation(s)
- Soumen Payra
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Navin Yadav
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Jarugu Narasimha Moorthy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India
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11
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Guo X, Shao BR, Jiang WF, Shi L. The Photocatalyst-Free Cross-Dehydrogenative Coupling Reaction Enabled by Visible-Light Direct Excitation of Substrate. J Org Chem 2021; 86:15743-15752. [PMID: 34694134 DOI: 10.1021/acs.joc.1c01775] [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
A new photocatalyst-free strategy for the cross-dehydrogenative C-C and C-P coupling reaction has been described. This protocol provides a concise method to synthesize various 1-substituted tetrahydroisoquinoline (THIQ) derivatives enabled by visible-light direct excitation of substrates without using any photocatalyst. Moreover, a wide substrate scope demonstrated good synthetic versatility and practicality.
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Affiliation(s)
- Xuan Guo
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Bing-Ru Shao
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Wen-Feng Jiang
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Lei Shi
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
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12
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Katsurayama Y, Ikabata Y, Maeda H, Segi M, Nakai H, Furuyama T. Direct Near Infrared Light-Activatable Phthalocyanine Catalysts. Chemistry 2021; 28:e202103223. [PMID: 34734432 DOI: 10.1002/chem.202103223] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Indexed: 12/29/2022]
Abstract
The high penetration of near-infrared (NIR) light makes it effective for use in selective reactions under light-shielded conditions, such as in sealed reactors and deep tissues. Herein, we report the development of phthalocyanine catalysts directly activated by NIR light to transform small organic molecules. The desired photocatalytic properties were achieved in the phthalocyanines by introducing the appropriate peripheral substituents and central metal. These phthalocyanine photocatalysts promote cross-dehydrogenative-coupling (CDC) under irradiation with 810 nm NIR light. The choice of solvent is important, and a mixture of a reaction-accelerating (pyridine) and -decelerating (methanol) solvents was particularly effective. Moreover, we demonstrate photoreactions under visible-light-shielded conditions through the transmission of NIR light. A combined experimental and computational mechanistic analysis revealed that this NIR reaction does not involve a photoredox-type mechanism with electron transfer, but instead a singlet-oxygen-mediated mechanism with energy transfer.
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Affiliation(s)
- Yoshino Katsurayama
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Yasuhiro Ikabata
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan.,Information and Media Center, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580, Japan.,Department of Computer Science and Engineering, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580, Japan
| | - Hajime Maeda
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Masahito Segi
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Hiromi Nakai
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan.,Department of Chemistry and Biochemistry School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan.,Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University Katsura, Kyoto, 615-8520, Japan
| | - Taniyuki Furuyama
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.,Japan Science and Technology Agency (JST)-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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13
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Lin C, Li P, Wang L. Visible-light induced Cross-Dehydrogenative-Coupling (CDC) reactions of N-aryl tetrahydroisoquinolines under aerobic conditions. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Shi S, Yang X, Tang M, Hu J, Loh TP. Direct Synthesis of α-Amino Nitriles from Sulfonamides via Base-Mediated C-H Cyanation. Org Lett 2021; 23:4018-4022. [PMID: 33970649 DOI: 10.1021/acs.orglett.1c01232] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we disclose a transition-metal-free reaction system that enables α-cyanation of sulfonamides through C-H bond cleavage for the preparation of α-amino nitriles, including difficult-to-access all-alkyl α-tertiary scaffolds. More than 50 substrate examples prove a wide functional group tolerance. Additionally, its synthetic practicality is highlighted by gram-scalability and the late-stage modification of natural compounds. Mechanistic experiments suggest that this process involves in situ formation of an imine intermediate via base-promoted elimination of HF.
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Affiliation(s)
- Shasha Shi
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Xianyu Yang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Man Tang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Jiefeng Hu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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15
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Ansari A, Gorde AB, Ramapanicker R. Asymmetric synthesis of six tetrahydroisoquinoline natural products through α-amination of an aldehyde. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Filipović A, DŽambaski Z, Vasiljević-Radović D, BondŽić BP. Visible light promoted photoredox C(sp 3)-H bond functionalization of tetrahydroisoquinolines in flow. Org Biomol Chem 2021; 19:2668-2675. [PMID: 33666639 DOI: 10.1039/d0ob02582h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A merger of organocatalysis and visible light photoredox catalysis performed in flow allowed access to a wide range of functionalized N-aryl-substituted tetrahydroisoquinolines (THIQs) in a formal C-H oxidation/Mannich reaction. Strecker type functionalization and copper-catalyzed alkynylation of several N-aryl-substituted THIQs were also successfully performed in flow, giving valuable products with high efficiencies. The use of custom-made porous polymeric type microreactors proved to be crucial regarding the C-H oxidation step and overall reaction performance.
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Affiliation(s)
- Ana Filipović
- University of Belgrade-Institute of Chemistry, Technology and Metallurgy, Njegoševa 12, 11000 Belgrade, Republic of Serbia.
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17
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Singh P. Synthetic Approaches Towards the Synthesis of C-1 Azole Substituted Tetrahydroisoquinolines. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201228140959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
C-1 substituted tetrahydroisoquinolines have emerged as important scaffolds in
pharmaceutical and medical research. Although various methods for α-substitution on tetrahydroisoquinolines
have been discovered, the introduction of the azole group at C-1 position
remains a challenge. Recently, direct C-H activation methods and multicomponent reactions
have been employed towards the synthesis of azole containing tetrahydroisoquinolines. A
summary of such synthetic strategies is presented here as these promising methods can help
in developing more efficient synthetic routes. This minireview covers the available synthetic
methods and their mechanistic pathways for the preparation of C-1 azole substituted tetrahydroisoquinolines.
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Affiliation(s)
- Pushpinder Singh
- Department of Chemistry, DAV University, Jalandhar, Punjab, 144012, India
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18
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Xiong Y, Zhang J, Qi L, Zhang Y, Wang T. Oxidative C(SP2)‐P Formation: Direct Construction of C‐P Bond on Quinoxalines via Aromatic Phosphorous Oxide. ChemistrySelect 2021. [DOI: 10.1002/slct.202004036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yunkui Xiong
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Jianye Zhang
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
| | - Liping Qi
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Yu Zhang
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Tao Wang
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
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19
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Gao J, Weng X, Ma C, Xu X, Fang P, Mei T. Electrochemical 2,2,6,6-tetramethylpiperidinyl-N-oxyl (TEMPO)-Mediated α-Cyanation and Phosphonylation of Cyclic Amines with Metal-Free Conditions. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Aksenov AV, Aksenov NA, Kirilov NK, Skomorokhov AA, Aksenov DA, Kurenkov IA, Sorokina EA, Nobi MA, Rubin M. Does electrophilic activation of nitroalkanes in polyphosphoric acid involve formation of nitrile oxides? RSC Adv 2021; 11:35937-35945. [PMID: 35492804 PMCID: PMC9043268 DOI: 10.1039/d1ra06503c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/27/2021] [Indexed: 11/21/2022] Open
Abstract
The mechanistic rationale involving activation of nitroalkanes towards interaction with nucleophilic reagents in the presence of polyphosphoric acid (PPA) was re-evaluated. Could nitrile oxide moieties be formed during this process? This experiment demonstrates that at least in some cases this could happen, as generated nitrile oxides were successfully intercepted as adducts of [3 + 2] cycloadditions. The mechanistic rationale involving activation of nitroalkanes towards interaction with nucleophilic reagents in the presence of polyphosphoric acid (PPA) was re-evaluated. Could nitrile oxide moieties be formed during this process?![]()
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Affiliation(s)
- Alexander V. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Nicolai A. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Nikita K. Kirilov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Anton A. Skomorokhov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Dmitrii A. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Igor A. Kurenkov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
| | - Elena A. Sorokina
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Mezvah A. Nobi
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, KS 66045, USA
| | - Michael Rubin
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russia
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, KS 66045, USA
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21
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Yoshida K, Okada K, Ueda H, Tokuyama H. A Concise Enantioselective Total Synthesis of (-)-Deoxoapodine. Angew Chem Int Ed Engl 2020; 59:23089-23093. [PMID: 32896080 DOI: 10.1002/anie.202010759] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Indexed: 12/14/2022]
Abstract
We have established a highly convergent 10-step route for the total synthesis of (-)-deoxoapodine, which is a hexacyclic aspidosperma alkaloid. The quaternary C5 center of the characteristic tetrahydrofuran ring was constructed by a chiral-phosphoric-acid-catalyzed enantioselective bromocycloetherification in a 5-endo fashion and subsequent allylation by using the Keck protocol. Construction of the aspidosperma skeleton features the formation of a nine-membered lactam by a catalytic C-H palladation/alkylation cascade at the indole 2-position and an iron-catalyzed oxidative transannular reaction at a late-stage of the synthesis.
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Affiliation(s)
- Kei Yoshida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Kosuke Okada
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
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22
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Unglaube F, Hünemörder P, Guo X, Chen Z, Wang D, Mejía E. Phenazine Radical Cations as Efficient Homogeneous and Heterogeneous Catalysts for the Cross‐Dehydrogenative Aza‐
Henry
Reaction. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Felix Unglaube
- Leibniz Institute for Catalysis Albert-Einstein-Str. 29a DE-18059 Rostock Germany
| | - Paul Hünemörder
- Leibniz Institute for Catalysis Albert-Einstein-Str. 29a DE-18059 Rostock Germany
| | - Xuewen Guo
- Leibniz Institute for Catalysis Albert-Einstein-Str. 29a DE-18059 Rostock Germany
| | - Zixu Chen
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Dengxu Wang
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Esteban Mejía
- Leibniz Institute for Catalysis Albert-Einstein-Str. 29a DE-18059 Rostock Germany
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23
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Yoshida K, Okada K, Ueda H, Tokuyama H. A Concise Enantioselective Total Synthesis of (−)‐Deoxoapodine. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010759] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kei Yoshida
- Graduate School of Pharmaceutical Sciences Tohoku University Aoba 6-3, Aramaki Aoba-ku Sendai, Miyagi 980-8578 Japan
| | - Kosuke Okada
- Graduate School of Pharmaceutical Sciences Tohoku University Aoba 6-3, Aramaki Aoba-ku Sendai, Miyagi 980-8578 Japan
| | - Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences Tohoku University Aoba 6-3, Aramaki Aoba-ku Sendai, Miyagi 980-8578 Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences Tohoku University Aoba 6-3, Aramaki Aoba-ku Sendai, Miyagi 980-8578 Japan
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24
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Batra A, Singh KN. Recent Developments in Transition Metal‐Free Cross‐Dehydrogenative Coupling Reactions for C–C Bond Formation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000785] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aanchal Batra
- PG Department of Chemistry Mehr Chand Mahajan DAV College for Women Sec 36/A 160036 Chandigarh India
| | - Kamal Nain Singh
- Department of Chemistry and Centre of Advanced studies in Chemistry Panjab University 160014 Chandigarh India
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25
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Efficient aerobic cross-dehydrogenative coupling of tertiary amines over NiGa layered double oxide. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Kouznetsov VV, Ortiz-Villamizar MC, Méndez-Vargas LY, Galvis CEP. A Review on Metal-Free Oxidative α-Cyanation and Alkynylation of N-Substituted Tetrahydroisoquinolines as a Rapid Route for the Synthesis of Isoquinoline Alkaloids. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200420073539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
As a fast-growing research field in modern organic chemistry, the crossdehydrogenative
coupling (CDC) has seen considerable development in its scope of application,
uptake into industry, and understanding of its mechanism to functionalize the tetrahydroisoquinoline
(THIQ) scaffold. Among the vast number of possibilities offered by
the CDC coupling, the metal-free oxidative α-cyanation and alkynylation reactions have
emerged as powerful strategies in the synthesis of diverse and potentially bioactive
THIQs. Even though transition-metal catalyzed CDC reactions have undoubtedly made
significant progress in THIQ chemistry, general and selective protocols for the metal-free
oxidative α-cyanation and alkynylation reactions of THIQs are urgently needed. Thereby,
this critical discussion is aimed to highlight the recent progress in this field of CDC reactions
where Csp3-H bonds are activated without metal catalysts to introduce the CN and the alkynyl groups into
the THIQ core.
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Affiliation(s)
- Vladimir V. Kouznetsov
- Laboratory of Organic and Bimolecular Chemistry, CMN, Industrial University of Santande, Guatiguará Technology Park, Km 2 Vía Refugio, Piedecuesta 681011, Colombia
| | - Marlyn C. Ortiz-Villamizar
- Laboratory of Organic and Bimolecular Chemistry, CMN, Industrial University of Santande, Guatiguará Technology Park, Km 2 Vía Refugio, Piedecuesta 681011, Colombia
| | - Leonor Y. Méndez-Vargas
- Laboratory of Organic and Bimolecular Chemistry, CMN, Industrial University of Santande, Guatiguará Technology Park, Km 2 Vía Refugio, Piedecuesta 681011, Colombia
| | - Carlos E. Puerto Galvis
- Laboratory of Organic and Bimolecular Chemistry, CMN, Industrial University of Santande, Guatiguará Technology Park, Km 2 Vía Refugio, Piedecuesta 681011, Colombia
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27
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Gao Z, Xia Z, Dai L, Ye S. N‐Heterocyclic Carbene Catalyzed Photooxidation: Intramolecular Cross Dehydrogenative Coupling of Tetrahydroisoquinoline‐Tethered Aldehydes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000164] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Zhong‐Hua Gao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
| | - Zi‐Hao Xia
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Lei Dai
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
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28
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Toward Rational Understandings of α-C-H Functionalization: Energetic Studies of Representative Tertiary Amines. iScience 2020; 23:100851. [PMID: 32058963 PMCID: PMC6997867 DOI: 10.1016/j.isci.2020.100851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 12/31/2019] [Accepted: 01/14/2020] [Indexed: 12/17/2022] Open
Abstract
Functionalization of α-C–H bonds of tertiary amines to build various α-C–X bonds has become a mainstream in synthetic chemistry nowadays. However, due to lack of fundamental knowledge on α-C–H bond strength as an energetic guideline, rational exploration of new synthetic methodologies remains a far-reaching anticipation. Herein, we report a unique hydricity-based approach to establish the first integrated energetic scale covering both the homolytic and heterolytic energies of α-C–H bonds for 45 representative tertiary amines and their radical cations. As showcased from the studies on tetrahydroisoquinolines (THIQs) by virtue of their thermodynamic criteria, the feasibility and mechanisms of THIQ oxidation were deduced, which, indeed, were found to correspond well with experimental observations. This integrated scale provides a good example to relate bond energetics with mechanisms and thermodynamic reactivity of amine α-C–H functionalization and hence, may be referenced for analyzing similar structure-property problems for various substrates. A unique hydricity-based methodology for bond energy determination The first integrated α-C–H bond energy scale of tertiary amines Thermodynamics-based diagnosis of the feasibility/mechanism of amine oxidation
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29
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Spencer ARA, Grainger R, Panigrahi A, Lepper TJ, Bentkowska K, Larrosa I. Transition metal-free cross-dehydrogenative arylation of unactivated benzylic C–H bonds. Chem Commun (Camb) 2020; 56:14479-14482. [DOI: 10.1039/d0cc06212j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The cross-dehydrogenative arylation of benzylic C–H bonds with arenes provides straightforward access to synthetically useful 1,1-diarylmethanes, from readily available starting materials.
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Affiliation(s)
- Andrew R. A. Spencer
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Rachel Grainger
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Adyasha Panigrahi
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Thomas J. Lepper
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Katarzyna Bentkowska
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Igor Larrosa
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
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30
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Yi F, Fu C, Sun Q, Wei H, Yu G, Yi W. Direct intramolecular double cross-dehydrogentive-coupling (CDC) cyclization of N-(2-pyridyl)amidines under metal-free conditions. RSC Adv 2019; 9:42172-42182. [PMID: 35542831 PMCID: PMC9076575 DOI: 10.1039/c9ra09265j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/06/2019] [Indexed: 01/08/2023] Open
Abstract
A facile transition-metal-free protocol to form 2-iminoimidazo[1, 2-a]-pyridines bearing a -CHBr2 group and an aza-quaternary carbon center at the 3 position from N-(2-pyridyl)amidines substrates, in which the new heterocyclic skeletons constructed from amidines via radical reactions or nucleophilic substitution reactions are promoted only by CBr4 under mild conditions, is demonstrated. The reactions were realized by intramolecular CDC reaction involving C-N and C-C bond formation via the sequential C(sp3)-H bifunctionalization mode on the same carbon atom under mild conditions. Moreover, this work also provides an excellent and representative example for CBr4 as an efficient reagent to initiate radical reactions under initiator-free conditions or to give rise to nucleophilic substitution reactions only by base.
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Affiliation(s)
- Fengping Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
| | - Chao Fu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
| | - Qihui Sun
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
| | - Huazhen Wei
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
| | - Genfa Yu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai 201418 P. R. China
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31
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Guo N, Liu X, Xu H, Zhou X, Zhao H. A simple route towards the synthesis of 1,4,5-trisubstituted 1,2,3-triazoles from primary amines and 1,3-dicarbonyl compounds under metal-free conditions. Org Biomol Chem 2019; 17:6148-6152. [PMID: 31187848 DOI: 10.1039/c9ob01156k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An acetic acid-promoted approach that enables the synthesis of 1,4,5-trisubstituted 1,2,3-triazole derivatives has been achieved. This transformation employs readily available primary amines, 1,3-dicarbonyls and tosyl azide as the starting materials via a cycloaddition reaction under metal-free conditions. The reaction provides a simple access to fully substituted 1,2,3-triazoles from commercial substrates in moderate to excellent yields.
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Affiliation(s)
- Ningxin Guo
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022, P. R. China.
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32
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Tian X, Ren Y, Cheng X, Lu W. Aerobic Oxidative C(CO)–C Bond Cleavage under Catalyst‐Free and Additive‐Free Conditions. ChemistrySelect 2019. [DOI: 10.1002/slct.201903197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Xinzhe Tian
- College of ScienceHenan Agricultural University, Zhengzhou Henan 450002 P.R. China
- College of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000, Gansu P. R. China
| | - Yun‐Lai Ren
- College of ScienceHenan Agricultural University, Zhengzhou Henan 450002 P.R. China
| | - Xinqiang Cheng
- School of Chemical Engineering & PharmaceuticsHenan University of Science and Technology, Luoyang Henan 471003 P. R. China
| | - Weiwei Lu
- College of ScienceHenan Agricultural University, Zhengzhou Henan 450002 P.R. China
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33
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Borpatra PJ, Rastogi GK, Saikia MB, Deb ML, Baruah PK. Multi‐Component Reaction of 6‐Aminouracils, Aldehydes and Secondary Amines: Conversion of the Products into Pyrimido[4,5‐
d
]pyrimidines through C‐H Amination/Cyclization. ChemistrySelect 2019. [DOI: 10.1002/slct.201900210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Paran J. Borpatra
- Department of Applied Sciences, GUISTGauhati University, Guwahati- 781014 Assam India
| | - Gaurav K. Rastogi
- Department of Applied Sciences, GUISTGauhati University, Guwahati- 781014 Assam India
- Applied Organic Chemistry, CSIR-NEIST Jorhat- 785006 Assam
| | - Ms. B‐S. Saikia
- Department of Applied Sciences, GUISTGauhati University, Guwahati- 781014 Assam India
| | - Mohit L. Deb
- Department of Applied Sciences, GUISTGauhati University, Guwahati- 781014 Assam India
| | - Pranjal K. Baruah
- Department of Applied Sciences, GUISTGauhati University, Guwahati- 781014 Assam India
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34
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Haldar S, Jana CK. Direct (het)arylation of tetrahydroisoquinolines via a metal and oxidant free C(sp 3)-H functionalization enabled three component reaction. Org Biomol Chem 2019; 17:1800-1804. [PMID: 30516776 DOI: 10.1039/c8ob02309c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented method for the direct arylation and heteroarylation of tetrahydroisoquinolines under metal and oxidant free conditions is reported. The arylation reactions occurred via a C(sp3)-H functionalization enabled three component condensation of tetrahydroisoquinolines, 9-fluorenone imine, and arenes without involving a pre-functionalization/pre-derivatization step. A wide range of arenes and heteroarenes participated in the reaction to provide structurally diverse arylated tetrahydroisoquinolines with good to excellent yields.
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Affiliation(s)
- Surajit Haldar
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
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35
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Deng Z, Cheng D, Xu X, Yan J. The Nitromethylation of 1,3-Diarylpropenes Mediated by DDQ:N,N-Dimethyl-2-Nitroethyleneamine as a Nitromethane Equivalent. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhiteng Deng
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou 310014 P. R. China
| | - Dongping Cheng
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou 310014 P. R. China
| | - Xiaoliang Xu
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014 P. R. China
| | - Jizhong Yan
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou 310014 P. R. China
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36
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Yi B, Yan N, Yi N, Xie Y, Wen X, Au CT, Lan D. Oxidative cyanation of N-aryltetrahydroisoquinoline induced by visible light for the synthesis of α-aminonitrile using potassium thiocyanate as a “CN” agent. RSC Adv 2019; 9:29721-29725. [PMID: 35531501 PMCID: PMC9071963 DOI: 10.1039/c9ra06120g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/12/2019] [Indexed: 11/21/2022] Open
Abstract
A novel method for the synthesis of α-aminonitrile, through visible-light-induced oxidative cyanation of N-aryltetrahydroisoquinoline with potassium thiocyanate, has been developed.
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Affiliation(s)
- Bing Yi
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Ning Yan
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Niannian Yi
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Yanjun Xie
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Xiaoyong Wen
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Chak-Tong Au
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
| | - Donghui Lan
- Hunan Province Key Laboratory of Environmental Catalysis and Waste Rechemistry
- College of Chemistry and Chemical Engineering
- Hunan Institute of Engineering
- Xiangtan
- P. R. China
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37
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Tian X, Cheng X, Yang X, Ren YL, Yao K, Wang H, Wang J. Aerobic conversion of benzylic sp3 C–H in diphenylmethanes and benzyl ethers to CO bonds under catalyst-, additive- and light-free conditions. Org Chem Front 2019. [DOI: 10.1039/c9qo00004f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalyst-, additive- and light-free aerobic conversion of benzylic C–H to CO bonds is, for the first time, reported.
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Affiliation(s)
- Xinzhe Tian
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
- School of Chemical Engineering & Pharmaceutics
| | - Xinqiang Cheng
- School of Chemical Engineering & Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yun-Lai Ren
- School of Chemical Engineering & Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - Kaisheng Yao
- School of Chemical Engineering & Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - Huiyong Wang
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- P. R. China
| | - Jianji Wang
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- P. R. China
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38
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Džambaski Z, Bondžić BP. Dehydrogenative C(sp3)–H bond functionalization of tetrahydroisoquinolines mediated by organic oxidants under mild conditions. Org Biomol Chem 2019; 17:6420-6425. [DOI: 10.1039/c9ob01090d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
DDQ and IBX are effective SET oxidants of N-aryl-protected and unprotected THIQs. Mannich and Strecker type functionalizations ensued in an overall CDC reaction.
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Affiliation(s)
- Zdravko Džambaski
- Center for Chemistry
- ICTM institute
- University of Belgrade
- 11 000 Belgrade
- Serbia
| | - Bojan P. Bondžić
- Center for Chemistry
- ICTM institute
- University of Belgrade
- 11 000 Belgrade
- Serbia
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39
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Copper(II)-catalyzed-α-C(sp3)-H activation of cyclic amines: A simple and efficient strategy for the synthesis of fused pyrazole derivatives. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.10.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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40
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41
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Chen L, Sun C, Feng G, Cao M, Zhao SL, Yan J, Wan RZ, Liu L. Direct oxidative C-H alkynylation of N-carbamoyl tetrahydroisoquinolines and dihydroisoquinolines. Org Biomol Chem 2018; 16:2792-2799. [PMID: 29611855 DOI: 10.1039/c8ob00373d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient oxidative C-H alkynylation of N-carbamoyl tetrahydroisoquinolines mediated by a TEMPO oxoammonium salt has been established. A variety of electronically varied N-carbamoyl tetrahydroisoquinolines reacted with a range of alkynyl potassium trifluoroborates smoothly under mild metal-free conditions. Dihydroisoquinolines were also suitable components for the reaction. The synthetic applicability of the method for facile access to structurally diverse bioactive molecules was further demonstrated.
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Affiliation(s)
- Lei Chen
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China.
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42
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Patil MR, Dedhia NP, Kapdi AR, Kumar A. Cobalt(II)/N-Hydroxyphthalimide-Catalyzed Cross-Dehydrogenative Coupling Reaction at Room Temperature under Aerobic Condition. J Org Chem 2018; 83:4477-4490. [DOI: 10.1021/acs.joc.8b00203] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mahendra R. Patil
- Department of Chemistry, Institute of Chemical Technology, Mumbai 400 019, India
| | - Noopur P. Dedhia
- Department of Chemistry, Institute of Chemical Technology, Mumbai 400 019, India
| | - Anant R. Kapdi
- Department of Chemistry, Institute of Chemical Technology, Mumbai 400 019, India
| | - A.Vijay Kumar
- Department of Chemistry, Institute of Chemical Technology, Mumbai 400 019, India
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43
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Kouznetsov VV, Galvis CEP. Strecker reaction and α-amino nitriles: Recent advances in their chemistry, synthesis, and biological properties. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.005] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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44
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Jo H, Hassan AHE, Jung SY, Lee JK, Cho YS, Min SJ. Construction of 8-Azabicyclo[3.2.1]octanes via Sequential DDQ-Mediated Oxidative Mannich Reactions of N-Aryl Pyrrolidines. Org Lett 2018; 20:1175-1178. [DOI: 10.1021/acs.orglett.8b00098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hanbyeol Jo
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Ahmed H. E. Hassan
- Department
of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Seung Young Jung
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Jae Kyun Lee
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Yong Seo Cho
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Sun-Joon Min
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
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45
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Punirun T, Soorukram D, Kuhakarn C, Reutrakul V, Pohmakotr M. Oxidative Difluoromethylation of Tetrahydroisoquinolines Using TMSCF 2SPh: Synthesis of Fluorinated Pyrrolo[2,1-a]isoquinolines and Benzo[a]quinolizidines. J Org Chem 2018; 83:765-782. [PMID: 29271203 DOI: 10.1021/acs.joc.7b02783] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient C1-difluoromethylation of tetrahydroisoquinolenes was achieved using TMSCF2SPh as a difluoromethylating agent and 2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (TEMPO+BF4-) as an oxidant. The process provides an access to a variety of C1-difluoro(phenylsulfanyl)methylated tetrahydroisoquinoline adducts in good yields. These adducts were employed as key precursors for preparing fluorinated pyrrolo[2,1-a]isoquinoline and benzo[a]quinolizidines.
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Affiliation(s)
- Teerachai Punirun
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University , Rama VI Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University , Rama VI Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University , Rama VI Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University , Rama VI Road, Bangkok 10400, Thailand
| | - Manat Pohmakotr
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University , Rama VI Road, Bangkok 10400, Thailand
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46
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Oss G, de Vos SD, Luc KNH, Harper JB, Nguyen TV. Tropylium-Promoted Oxidative Functionalization of Tetrahydroisoquinolines. J Org Chem 2018; 83:1000-1010. [DOI: 10.1021/acs.joc.7b02584] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Giulia Oss
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Sander D. de Vos
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Kevin N. H. Luc
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Jason B. Harper
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Thanh V. Nguyen
- School of Chemistry, University of New South Wales, Sydney, Australia
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47
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Wang Y, Wu R, Zhao S, Quan Z, Su Y, Huo C. Air promoted annulation of thiophenols with alkynes leading to benzothiophenes. Org Biomol Chem 2018; 16:1667-1671. [DOI: 10.1039/c8ob00010g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Air promoted intermolecular annulation of thiophenols with alkynes, leading to complex benzothiophenes, is reported.
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Affiliation(s)
- Yajun Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Gansu 730070
- China
| | - Rui Wu
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Gansu 730070
- China
| | - Shijun Zhao
- College of Foreign Languages
- Lanzhou University of Technology
- Gansu 730050
- China
| | - Zhengjun Quan
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Gansu 730070
- China
| | - Yingpeng Su
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Gansu 730070
- China
| | - Congde Huo
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Gansu 730070
- China
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48
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Fatima N, Reddy BS, Gowravaram S, Yadav J, Kadari S, Putta CS. Synthesis and biological evaluation of 1-amino isochromans from 2-bromoethyl benzaldehyde and amines in acid medium. Bioorg Med Chem Lett 2018; 28:196-201. [DOI: 10.1016/j.bmcl.2017.11.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/13/2017] [Accepted: 11/09/2017] [Indexed: 01/17/2023]
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49
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Tyagi A, Yamamoto A, Yamamoto M, Yoshida T, Yoshida H. Direct cross-coupling between alkenes and tetrahydrofuran with a platinum-loaded titanium oxide photocatalyst. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00129d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A Pt-loaded TiO2 photocatalyst successfully catalyzed the direct cross-coupling between various alkenes and tetrahydrofuran (THF) without any additional oxidizing agent.
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Affiliation(s)
- Akanksha Tyagi
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Akira Yamamoto
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB)
| | - Muneaki Yamamoto
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Tomoko Yoshida
- Advanced Research Institute for Natural Science and Technology
- Osaka City University
- Osaka 558-8585
- Japan
| | - Hisao Yoshida
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB)
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50
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Huang Y, Yi W, Sun Q, Zhang L, Yi F. A new and facile approach to 1,2-dihydroisoquinolin-3(4H)-imines by the Cu(i)-catalyzed reaction of 2-ethynylbenzyl methanesulfonates, sulfonyl azides and amines. RSC Adv 2018. [DOI: 10.1039/c7ra12412k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A new, step-economical and operationally simple access to unsubstituted 1,2-dihydroisoquinolin-3(4H)-imines by Cu-catalyzed MCRs under mild conditions is described.
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Affiliation(s)
- Ying Huang
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Qihui Sun
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Lirong Zhang
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Fengping Yi
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
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