1
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Berlin CB, Roenfanz HF, Salwen M, Nehete S, Kozlowski MC. Total Syntheses of Clausenawallines A and E. Org Lett 2024; 26:5243-5247. [PMID: 38869077 DOI: 10.1021/acs.orglett.4c01352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
The first total syntheses of glycoborinine, clausenawalline A, and clausenawalline E were achieved. The key step employed a vanadium-catalyzed oxidative coupling of two hydroxycarbazole monomers. High-throughput experimentation was used to identify conditions favoring selective heterocoupling of these monomers that possess similar redox potentials. A combination of a vanadium catalyst and 4-acetamido-TEMPO gives rise to greatly enhanced cross selectivity relative to the vanadium catalyst alone. Conditions to selectively form homodimer clausenawalline A or heterodimer clausenawalline E as the major product were found.
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Affiliation(s)
- Cameron B Berlin
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Hanna F Roenfanz
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Madeleine Salwen
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Sai Nehete
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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2
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Carson MC, Kozlowski MC. Recent advances in oxidative phenol coupling for the total synthesis of natural products. Nat Prod Rep 2024; 41:208-227. [PMID: 37294301 PMCID: PMC10709532 DOI: 10.1039/d3np00009e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Covering: 2008 to 2023This review will describe oxidative phenol coupling as applied in the total synthesis of natural products. This review covers catalytic and electrochemical methods with a brief comparison to stoichiometric and enzymatic systems assessing their practicality, atom economy, and other measures. Natural products forged by C-C and C-O oxidative phenol couplings as well as from alkenyl phenol couplings will be addressed. Additionally, exploration into catalytic oxidative coupling of phenols and other related species (carbazoles, indoles, aryl ethers, etc.) will be surveyed. Future directions of this particular area of research will also be assessed.
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Affiliation(s)
- Matthew C Carson
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
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3
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Allen LAT, Natho P. Trends in carbazole synthesis - an update (2013-2023). Org Biomol Chem 2023; 21:8956-8974. [PMID: 37906471 DOI: 10.1039/d3ob01605f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
The interest of scientists in the carbazole core has risen steadily over the last 30 years, particularly over the last decade given its presence in several active pharmaceutical ingredients, functional materials and a wide range of biologically active natural products. The continuous development of more efficient, more (regio-)selective and "greener" methodologies to access the carbazole core is thus imperative. This review compares and evaluates synthetic strategies towards the carbazole core that have been reported since 2013, with a focus on their applicability towards the total synthesis of carbazole-containing natural products.
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Affiliation(s)
- Lewis A T Allen
- CheMastery, Paper Yard, 11a Quebec Way, London, SE16 7LG, UK
| | - Philipp Natho
- FLAME-Lab, Flow Chemistry and Microreactor Technology Laboratory, Department of Pharmacy-Drug Sciences, University of Bari "A. Moro", Via E. Orabona 4, 70125 Bari, Italy
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4
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Schuh T, Kataeva O, Knölker HJ. μ-Oxo-bis[(octacosafluoro- meso-tetraphenylporphyrinato)iron(iii)] - synthesis, crystal structure, and catalytic activity in oxidation reactions. Chem Sci 2023; 14:257-265. [PMID: 36687339 PMCID: PMC9811517 DOI: 10.1039/d2sc06083c] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022] Open
Abstract
We describe the synthesis and X-ray crystal structure of μ-oxo-bis[(octacosafluoro-meso-tetraphenylporphyrinato)iron(iii)] [(FeTPPF28)2O]. This novel iron complex is an efficient catalyst for oxidative biaryl coupling reactions of diarylamines and carbazoles. The asymmetric oxidative coupling in the presence of an axially chiral biaryl phosphoric acid as co-catalyst provides the 2,2'-bis(arylamino)-1,1'-biaryl in 96% ee. The Wacker-type oxidation of alkenes to the corresponding ketones with (FeTPPF28)2O as catalyst in the presence of phenylsilane proceeds at room temperature with air as the terminal oxidant. For internal and aliphatic alkenes increased ketone/alcohol product ratios were obtained.
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Affiliation(s)
- Tristan Schuh
- Fakultät Chemie, Technische Universität DresdenBergstrasse 6601069 DresdenGermanyhttps://tu-dresden.de/mn/chemie/oc/oc2+49 351-463-37030
| | - Olga Kataeva
- Fakultät Chemie, Technische Universität DresdenBergstrasse 6601069 DresdenGermanyhttps://tu-dresden.de/mn/chemie/oc/oc2+49 351-463-37030
| | - Hans-Joachim Knölker
- Fakultät Chemie, Technische Universität DresdenBergstrasse 6601069 DresdenGermanyhttps://tu-dresden.de/mn/chemie/oc/oc2+49 351-463-37030
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5
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Kumar A, Sasai H, Takizawa S. Atroposelective Synthesis of C-C Axially Chiral Compounds via Mono- and Dinuclear Vanadium Catalysis. Acc Chem Res 2022; 55:2949-2965. [PMID: 36206455 DOI: 10.1021/acs.accounts.2c00545] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Axially chiral compounds with rotationally constrained σ-bonds that exhibit atropisomerism are lucrative synthetic targets because of their ubiquity in functional materials and natural products. The metal complex-catalyzed enantioselective fabrication of axially chiral scaffolds has been widely investigated, and thus far, considerable progress has been made. Over the past two decades, we have developed a highly efficient strategy for constructing axially chiral biarenol derivatives using chiral mono- and dinuclear vanadium complexes. These complexes are readily prepared from vanadium(IV) salts and Schiff base ligands (generated from the condensation of (S)-tert-leucine and di- or monoformyl-(R)-1,1'-bi-2-naphthol (BINOL) derivatives) under O2 and act as highly active catalysts for highly stereoselective C-C bond formation. In particular, the vanadium complex-catalyzed enantioselective oxidative coupling of 2-naphthols 1 under oxygen or in air, which is a green oxidant, affords the desired axially chiral molecules in high yields and high stereoselectivity (up to quantitative yield and 97% ee), along with water as the sole coproduct. This coupling reaction tolerated various functional groups (such as halogens, alkoxys, and boryls) and avoided overoxidation of coupling products.The key feature of dinuclear vanadium(V) catalysts such as (Ra,S,S)-5a is an outstanding mode of the homocoupling reaction, in which a single molecule of the catalyst activates two molecules of the starting material (e.g., 2-naphthols) simultaneously. With this "dual activation" mechanism, the oxidative coupling promoted by the dinuclear catalyst proceeds in an intramolecular manner. The homocoupling rate using 5 mol % of the dinuclear vanadium(V) complex (Ra,S,S)-5a was measured to be 111 times faster than that of the mononuclear vanadium(IV) complex (S)-4a bearing a half motif of the dinuclear vanadium complex.In the case of the heterocoupling reaction utilizing two different kinds of arenol derivatives, only a starting arenol having lower oxidation potential seems to be activated by the mononuclear vanadium complex. The reaction rate of the heterocoupling using either mono- or dinuclear vanadium complexes showed no difference to give the coupling product in high yields but with a different enantioselective manner; chiral mononuclear vanadium(V) complexes showed better enantioselectivites than that of the dinuclear vanadium(V) complexes. A competing heterocoupling study and a linear correlation between the ee of the mononucaler vanadium catalyst and ee of the heterocoupling suggested that the heterocoupling involves an intermolecular radical-anion coupling pathway.In this Account, we summarize the recent advances in vanadium-catalyzed coupling reactions that produced important chiral molecules, such as biresorcinols, polycyclic biphenols, oxa[9]helicenes, bihydroxycarbazoles, and C1-symmetrical biarenols, and their coupling reaction mechanisms. By pursuing vanadium catalysis, we believe numerous additional transformations as well as a renewed interest in catalytic and chemo-, regio-, and enantioselective aryl-aryl bond constructions will be manifested.
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Affiliation(s)
- Ankit Kumar
- SANKEN, Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Hiroaki Sasai
- SANKEN, Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan.,Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
| | - Shinobu Takizawa
- SANKEN, Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
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6
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Abstract
Phenols and their derivatives are the elementary building blocks for several classes of complex molecules that play essential roles in biological systems. Nature has devised methods to selectively couple phenolic compounds, and many efforts have been undertaken by chemists to mimic such coupling processes. A range of mechanisms can be involved and with well-studied catalysts, reaction outcomes in phenol-phenol oxidative coupling reactions can be predicted with a good level of fidelity. However, reactions with catalysts that have not been studied or that do not behave similarly to known catalysts can be hard to predict and control. This Perspective provides an overview of catalytic methods for the oxidative coupling of phenols, focusing on the last 10 years, and summarizes current challenges.
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Affiliation(s)
- Jingze Wu
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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7
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Kasama K, Hinami Y, Mizuno K, Horino S, Nishio T, Yuki C, Kanomata K, Moustafa GAI, Gröger H, Akai S. Lipase-Catalyzed Kinetic Resolution of <i>C</i><sub>1</sub>-Symmetric Heterocyclic Biaryls. Chem Pharm Bull (Tokyo) 2022; 70:391-399. [DOI: 10.1248/cpb.c22-00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kengo Kasama
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Yuya Hinami
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Karin Mizuno
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Satoshi Horino
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Tomoya Nishio
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Chiharu Yuki
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Kyohei Kanomata
- Graduate School of Pharmaceutical Sciences, Osaka University
| | | | - Harald Gröger
- Chair of Industrial Organic Chemistry and Biotechnology, Faculty of Chemistry, Bielefeld University
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University
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8
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Banerjee A, Saha S, Maji MS. Cascade Benzannulation Approach for the Syntheses of Lipocarbazoles, Carbazomycins, and Related Alkaloids. J Org Chem 2022; 87:4343-4359. [PMID: 35253429 DOI: 10.1021/acs.joc.2c00042] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ankush Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Shuvendu Saha
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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9
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Halligudra G, Paramesh CC, Mudike R, Ningegowda M, Rangappa D, Shivaramu PD. Pd II on Guanidine-Functionalized Fe 3O 4 Nanoparticles as an Efficient Heterogeneous Catalyst for Suzuki-Miyaura Cross-Coupling and Reduction of Nitroarenes in Aqueous Media. ACS OMEGA 2021; 6:34416-34428. [PMID: 34963927 PMCID: PMC8697406 DOI: 10.1021/acsomega.1c04528] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/26/2021] [Indexed: 05/27/2023]
Abstract
This paper presents guanidine-functionalized Fe3O4 magnetic nanoparticle-supported palladium (II) (Fe3O4@Guanidine-Pd) as an effective catalyst for Suzuki-Miyaura cross-coupling of aryl halides using phenylboronic acids and also for selective reduction of nitroarenes to their corresponding amines. Fe3O4@Guanidine-Pd synthesized is well characterized using FT-IR spectroscopy, XRD, SEM, TEM, EDX, thermal gravimetric analysis, XPS, inductively coupled plasma-optical emission spectroscopy, and vibrating sample magnetometry analysis. The prepared Fe3O4@Guanidine-Pd showed effective catalytic performance in the Suzuki-Miyaura coupling reactions by converting aryl halides to their corresponding biaryl derivatives in an aqueous environment in a shorter reaction time and with a meagerly small amount of catalyst (0.22 mol %). Also, the prepared Fe3O4@Guanidine-Pd effectively reduced nitroarenes to their corresponding amino derivatives in aqueous media at room temperature with a high turnover number and turnover frequency with the least amount of catalyst (0.13 mol %). The most prominent feature of Fe3O4@Guanidine-Pd as a catalyst is the ease of separation of the catalyst from the reaction mixture after the reaction with the help of an external magnet with good recovery yield and also reuse of the recovered catalyst for a few cycles without significant loss in its catalytic activity.
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Affiliation(s)
- Guddappa Halligudra
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Chitrabanu C. Paramesh
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Ravi Mudike
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
- Solar
Resource Assessment Division, National Institute
of Solar Energy, Gwal Pahari, Gurugram 122 003, Haryana, India
| | - Mallesha Ningegowda
- SRI
RAM CHEM, R & D Centre, Plot No. 31, JCK Industrial Park, Belagola Industrial Area, Mysore 570016, India
| | - Dinesh Rangappa
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Prasanna D. Shivaramu
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
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10
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Kamble GT, Salem MSH, Abe T, Park H, Sako M, Takizawa S, Sasai H. Chiral Vanadium(V)-catalyzed Oxidative Coupling of 4-Hydroxycarbazoles. CHEM LETT 2021. [DOI: 10.1246/cl.210367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ganesh T. Kamble
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Mohamed S. H. Salem
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
| | - Tsukasa Abe
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hanseok Park
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Makoto Sako
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Shinobu Takizawa
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hiroaki Sasai
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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11
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Points GL, Beaudry CM. Regioselective Synthesis of Substituted Carbazoles, Bicarbazoles, and Clausine C. Org Lett 2021; 23:6882-6885. [PMID: 34424701 DOI: 10.1021/acs.orglett.1c02449] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Substituted carbazoles are efficiently constructed from 3-triflato-2-pyrones and alkynyl anilines. Multiple substituents are tolerated on the carbazole, and complete control of regiochemistry is observed. Complicated and sterically congested substitution patterns are produced. This strategy is also used to prepare substituted bicarbazoles and related biaryls. Finally, the method was showcased in a synthesis of the carbazole natural product clausine C.
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Affiliation(s)
- Gary L Points
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Christopher M Beaudry
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
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12
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Benavides A, Jiménez-Vázquez HA, Avila-Melo JL, Fuentes-Gutiérrez A, Tamariz J. Total Synthesis of the Natural Carbazoles O-Demethylmurrayanine and Murrastanine A, and of a C4,C4′ Symmetric Murrastanine A Dimer from N-Phenyl-4,5-dimethylene-1,3-oxazolidin-2-one. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1385-9052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe synthesis of natural carbazoles O-demethylmurrayanine and murrastanine A starting from the title exo-heterocyclic diene is described. In the synthesis of murrastanine A, its symmetric C4,C4′ dimer can be obtained as the sole product under rather mild conditions. In all cases, the key intermediate is the same diarylamine. The carbazole nucleus is obtained through a Pd-promoted cyclization of the appropriate diarylamine. For the synthesis of O-demethylmurrayanine, the cyclization takes place on a silylated derivative. The crystal structures of murrayanine, two diarylamines, and two non-natural carbazole intermediates are also presented.
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13
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Witulski B, Alayrac C. Rhodium-Catalyzed Crossed [2+2+2] Cycloaddition with Ynamides: Key-Strategy for the Concise Total Synthesis of 3-Oxygenated Carbazole Alkaloids. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Kasama K, Kanomata K, Hinami Y, Mizuno K, Uetake Y, Amaya T, Sako M, Takizawa S, Sasai H, Akai S. Chemo- and regioselective cross-dehydrogenative coupling reaction of 3-hydroxycarbazoles with arenols catalyzed by a mesoporous silica-supported oxovanadium. RSC Adv 2021; 11:35342-35350. [PMID: 35493149 PMCID: PMC9042799 DOI: 10.1039/d1ra07723f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 10/25/2021] [Indexed: 12/14/2022] Open
Abstract
Cross-dehydrogenative coupling between 3-hydroxycarbazoles and 2-naphthols has been achieved by using a mesoporous silica-supported oxovanadium catalyst. Cross-dehydrogenative coupling between 3-hydroxycarbazoles and 2-naphthols has been achieved by using a mesoporous silica-supported oxovanadium catalyst.![]()
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Affiliation(s)
- Kengo Kasama
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kyohei Kanomata
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuya Hinami
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Karin Mizuno
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuta Uetake
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Toru Amaya
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Graduate School of Science, Nagoya City University, Nagoya, Aichi 467-8501, Japan
| | - Makoto Sako
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Shinobu Takizawa
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hiroaki Sasai
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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15
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Takizawa S, Sasai H, S. H. Salem M, Kumar A, Sako M, Abe T. Preparation of Optically Pure Dinuclear Cobalt(III) Complex with Λ-Configuration as a Dianionic Chiral Catalyst. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)41] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Sako M, Higashida K, Kamble GT, Kaut K, Kumar A, Hirose Y, Zhou DY, Suzuki T, Rueping M, Maegawa T, Takizawa S, Sasai H. Chemo- and enantioselective hetero-coupling of hydroxycarbazoles catalyzed by a chiral vanadium( v) complex. Org Chem Front 2021. [DOI: 10.1039/d1qo00783a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The catalytic enantioselective oxidative hetero-coupling of arenols using a chiral vanadium(v) complex has been developed.
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Affiliation(s)
- Makoto Sako
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Keigo Higashida
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Ganesh Tatya Kamble
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Kevin Kaut
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Ankit Kumar
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Yuka Hirose
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- School of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Osaka 577-8502, Japan
| | - Da-Yang Zhou
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Takeyuki Suzuki
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
- Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Tomohiro Maegawa
- School of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Osaka 577-8502, Japan
| | - Shinobu Takizawa
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hiroaki Sasai
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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17
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Sako M, Takizawa S, Sasai H. Chiral vanadium complex-catalyzed oxidative coupling of arenols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131645] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Schober L, Sako M, Takizawa S, Gröger H, Sasai H. Catalytic and enantioselective oxa-Piancatelli reaction using a chiral vanadium complex. Chem Commun (Camb) 2020; 56:10151-10154. [PMID: 32735309 DOI: 10.1039/d0cc02621b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An enantioselective oxa-Piancatelli reaction was established for the first time using a chiral vanadium(v) catalyst. The dual Brønsted and Lewis acid properties of the vanadium catalyst afforded 4-hydroxycyclopent-2-enone derivatives in up to 90% yields and with 93 : 7 enantiomeric ratios, as well as >20 : 1 diastereomeric ratios.
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Affiliation(s)
- Lukas Schober
- Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
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Vanadium(V) Complex-Catalyzed One-Pot Synthesis of Phenanthridines via a Pictet-Spengler-Dehydrogenative Aromatization Sequence. Catalysts 2020. [DOI: 10.3390/catal10080860] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Phenanthridine and its derivatives are important structural motifs that exist in natural products, biologically active compounds, and functional materials. Here, we report a mild, one-pot synthesis of 6-arylphenanthridine derivatives by a sequential cascade Pictet-Spengler-dehydrogenative aromatization reaction mediated by oxovanadium(V) complexes under aerobic conditions. The reaction of 2-(3,5-dimethoxyphenyl)aniline with a range of commercially available aryl aldehydes provided the desired phenanthridine derivatives in up to 96% yield. The ability of vanadium(V) complexes to function as efficient redox and Lewis acid catalysts enables the sequential reaction to occur under mild conditions.
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Takizawa S. Organocatalytic Synthesis of Highly Functionalized Heterocycles by Enantioselective aza-Morita-Baylis-Hillman-Type Domino Reactions. Chem Pharm Bull (Tokyo) 2020; 68:299-315. [PMID: 32238648 DOI: 10.1248/cpb.c19-00900] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Organocatalytic enantioselective domino reactions are an extremely attractive methodology, as their use enables the construction of complex chiral skeletons from readily available starting materials in two or more steps by a single operation under mild reaction conditions. Thus, these reactions can save both the quantity of chemicals and length of time typically required for the isolation and/or purification of synthetic intermediates. Additionally, no metal contamination of the products occurs, given that organocatalysts include no expensive or toxic metals. The aza-Morita-Baylis-Hillman (aza-MBH) reaction is an atom-economical carbon-carbon bond-forming reaction between α,β-unsaturated carbonyl compounds and imines mediated by Lewis base (LB) catalysts, such as nucleophilic phosphines and amines. aza-MBH products are functionalized chiral β-amino acid derivatives that are highly valuable as pharmaceutical raw materials. Although various enantioselective aza-MBH processes have been investigated, very few studies of aza-MBH-type domino reactions have been reported due to the complexity of the aza-MBH process, which involves a Michael/Mannich/H-transfer/β-elimination sequence. Accordingly, in this review article, our recent efforts in the development of enantioselective domino reactions initiated by MBH processes are described. In the domino reactions, chiral organocatalysts bearing Brønsted acid (BA) and/or LB units impart synergistic activation to substrates, leading to the easy synthesis of highly functionalized heterocycles (some of which have tetrasubstituted and/or quaternary carbon stereocenters) in high yield and enantioselectivity.
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Affiliation(s)
- Shinobu Takizawa
- Department of Synthetic Organic Chemistry, Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University
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Khan A, Karim R, Dhimane H, Alam S. Mild and Efficient Synthesis of Functionalized Carbazoles via a DBU‐Assisted Sequence Involving Cu‐ and Pd‐Catalyzed Coupling Reactions. ChemistrySelect 2019. [DOI: 10.1002/slct.201900788] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Aminur Khan
- Department of ChemistryAliah University, IIA/27, New Town Kolkata 700160 India
| | - Rejaul Karim
- Department of ChemistryAliah University, IIA/27, New Town Kolkata 700160 India
| | - Hamid Dhimane
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques - UMR 8601 CNRSUFR des Sciences Fondamentales et BiomédicalesUniversité Paris Descartes, 45 rue des Saints-Pères 75270 Paris Cedex 06 France
| | - Safiul Alam
- Department of ChemistryAliah University, IIA/27, New Town Kolkata 700160 India
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Sako M, Takizawa S, Sasai H. Chiral Vanadium Complex-catalyzed Enantioselective Oxidative Coupling Reactions. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Shinobu Takizawa
- The Institute of Scientific and Industrial Research, Osaka University
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research, Osaka University
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Zumbrägel N, Sako M, Takizawa S, Sasai H, Gröger H. Vanadium-Catalyzed Dehydrogenation of N-Heterocycles in Water. Org Lett 2018; 20:4723-4727. [DOI: 10.1021/acs.orglett.8b01484] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nadine Zumbrägel
- Chair of Organic Chemistry I, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Harald Gröger
- Chair of Organic Chemistry I, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
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Arae S, Beppu S, Kawatsu T, Igawa K, Tomooka K, Irie R. Asymmetric Synthesis of Axially Chiral Benzocarbazole Derivatives Based on Catalytic Enantioselective Hydroarylation of Alkynes. Org Lett 2018; 20:4796-4800. [DOI: 10.1021/acs.orglett.8b01945] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sachie Arae
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Shota Beppu
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Takahiro Kawatsu
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Ryo Irie
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
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Sako M, Sugizaki A, Takizawa S. Asymmetric oxidative coupling of hydroxycarbazoles: Facile synthesis of (+)-bi-2-hydroxy-3-methylcarbazole. Bioorg Med Chem Lett 2018; 28:2751-2753. [PMID: 29503021 DOI: 10.1016/j.bmcl.2018.02.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/13/2018] [Accepted: 02/15/2018] [Indexed: 10/18/2022]
Abstract
Asymmetric oxidative coupling reactions of hydroxycarbazoles have been established using a chiral dinuclear vanadium complex. To demonstrate the utility of vanadium-catalyzed reactions, we have used them to synthesize (+)-bi-2-hydroxy-3-carbazole in three steps from cyclohexanone and commercially available aniline derivatives.
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Affiliation(s)
- Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR) Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Akimasa Sugizaki
- The Institute of Scientific and Industrial Research (ISIR) Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR) Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan.
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