1
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Bora D, John SE, Galla MS, Sathish M, Shankaraiah N. Rh(III)-catalysed site-selective alkylation of β-carbolines/isoquinolines and tandem C H/C N functionalization to construct indolizine-indole frameworks. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Soni JP, Kumawat A, Sathish M, Yadav S, Jadhav NA, Shankaraiah N. Catalyst‐Free Site‐Selective Diverse Functionalization of Inherent C–H Bonds in 1‐Aryl‐β‐carbolines, Norharmane and Harmine. ChemistrySelect 2022. [DOI: 10.1002/slct.202202299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jay Prakash Soni
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500 037 India
| | - Akshay Kumawat
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500 037 India
| | - Manda Sathish
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM) Vicerrectoría de Investigación y Postgrado Universidad Católica del Maule Talca 3460000 Chile
| | - Sachin Yadav
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500 037 India
| | - Nayan Arvind Jadhav
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500 037 India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500 037 India
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3
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Shi J, Wang RA, Wu W, Song JR, Chi Q, Pan WD, Ren H. Copper-Catalyzed Aerobic Selective Oxidation of Tetrahydrocarbolines. Org Lett 2022; 24:3358-3362. [PMID: 35503733 DOI: 10.1021/acs.orglett.2c01059] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a safe and convenient open-flask copper-catalyzed selective oxidation/functionalization methodology for tetrahydrocarbolines and tetrahydro-β-carbolines that employs atmospheric O2 as the terminal oxidant. The system is applicable to oxidative rearrangement of tetrahydro-β-carbolines, tetrahydrocarboline oxidation to α-alkoxy carbazoles and spirooxindoles, and Witkop oxidation. Mechanistic experiments indicated that a single-electron oxidation process is responsible for the tunable selectivity control. This copper-catalysis protocol represents a significant advance in the field of indole oxidation.
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Affiliation(s)
- Jun Shi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Rui-An Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Wei Wu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Jun-Rong Song
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Qin Chi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Wei-Dong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang, 550014, China
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4
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Soni JP, Sathish M, Nachtigall FM, Santos LS, Shankaraiah N. Brown seaweed‐derived alginic acid: An efficient and reusable catalyst for Pictet‐Spengler reaction to access tetrahydro‐β‐carboline and tetrahydroisoquinoline frameworks. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jay Prakash Soni
- National Institute of Pharmaceutical Education and Research Hyderabad Department of Medicinal Chemistry 500037 Hyderabad INDIA
| | - Manda Sathish
- Catholic University of the Maule: Universidad Catolica del Maule Research center for Advance Studies of Maule, 3460000 Talca CHILE
| | - Fabiane M. Nachtigall
- Universidad Autonoma de Chile Instituto de Ciencias Quimicas Aplicadas 3467987 Talca CHILE
| | - Leonardo S. Santos
- Talca University: Universidad de Talca Chemistry Institute of Natural Resources 3460000 Talca CHILE
| | - Nagula Shankaraiah
- National Institute of Pharmaceutical Education and Research NIPER Department of Medicinal Chemistry Balanagar 500037 Hyderabad INDIA
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5
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Valapil DG, Kadagathur M, Shankaraiah N. Stereoselective Aldol and Conjugate Addition Reactions Mediated by Proline‐Based Catalysts and Its Analogues: A Concise Review. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Durgesh Gurukkala Valapil
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Manasa Kadagathur
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
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6
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Yuan X, Cui Y, Zhang X, Qin L, Sun Q, Duan X, Chen L, Li G, Qiu J, Guo K. Electrochemical Tri‐ and Difluoromethylation‐Triggered Cyclization Accompanied by the Oxidative Cleavage of Indole Derivatives. Chemistry 2021; 27:6522-6528. [DOI: 10.1002/chem.202005368] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/25/2021] [Indexed: 01/02/2023]
Affiliation(s)
- Xin Yuan
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Yu‐Sheng Cui
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Xin‐Peng Zhang
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Long‐Zhou Qin
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Qi Sun
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Xiu Duan
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Lin Chen
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Guigen Li
- Institute of Chemistry & Biomedical Science Nanjing University No.163, Xianlin Avenue, Qixia District Nanjing 210093 P. R. China
- Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
| | - Jiang‐Kai Qiu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu Rd S Nanjing 211816 P. R. China
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7
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Sathish M, Nachtigall FM, Santos LS. Bifunctional thiosquaramide catalyzed asymmetric reduction of dihydro-β-carbolines and enantioselective synthesis of (-)-coerulescine and (-)-horsfiline by oxidative rearrangement. RSC Adv 2020; 10:38672-38677. [PMID: 35517527 PMCID: PMC9057260 DOI: 10.1039/d0ra07705d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 10/15/2020] [Indexed: 12/11/2022] Open
Abstract
Tetrahydro-β-carboline (THBC) is a tricyclic ring system that can be found in a large number of bioactive alkaloids. Herein, we report a simple and efficient method for the synthesis of enantiopure THBCs through a chiral thiosquaramide (11b) catalyzed imine reduction of dihydro-β-carbolines (17a-f). The in situ generated Pd-H employed as hydride source in the reaction of differently substituted chiral THBCs (18a-f) afforded high selectivities (R isomers, up to 96% ee) and good isolated yields (up to 88%). Moreover, the chiral thiosquaramide used also afforded exceptional catalyst activity in the syntheses of (-)-coerulescine (5) and (-)-horsfiline (6) with excellent enantioselectivities up to 98% and 93% ee, respectively, via an enantioselective oxidative rearrangement approach.
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Affiliation(s)
- Manda Sathish
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca Casilla 747 3460000 Talca Chile
- Núcleo Científico Multidisciplinario-DI, Universidad de Talca Casilla 747 3460000 Talca Chile
| | - Fabiane M Nachtigall
- Instituto de Ciencias Químicas Aplicadas, Universidad Autónoma de Chile Talca 3467987 Chile
| | - Leonardo S Santos
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca Casilla 747 3460000 Talca Chile
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8
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Abstract
Oxidation of indoles is a fundamental organic transformation to deliver a variety of synthetically and pharmaceutically valuable nitrogen-containing compounds. Prior methods require the use of either organic oxidants (meta-chloroperoxybenzoic acid, N-bromosuccinimide, t-BuOCl) or stoichiometric toxic transition metals [Pb(OAc)4, OsO4, CrO3], which produced oxidant-derived by-products that are harmful to human health, pollute the environment and entail immediate purification. A general catalysis protocol using safer oxidants (H2O2, oxone, O2) is highly desirable. Herein, we report a unified, efficient halide catalysis for three oxidation reactions of indoles using oxone as the terminal oxidant, namely oxidative rearrangement of tetrahydro-β-carbolines, indole oxidation to 2-oxindoles, and Witkop oxidation. This halide catalysis protocol represents a general, green oxidation method and is expected to be used widely due to several advantageous aspects including waste prevention, less hazardous chemical synthesis, and sustainable halide catalysis. Indole oxidation represents a fundamental organic transformation delivering valuable nitrogen compounds. Here, the authors report a general halide catalysis protocol applied to three classes of oxidation reactions of indoles with oxone as a sustainable terminal oxidant.
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9
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Tokala R, Bora D, Sana S, Nachtigall FM, Santos LS, Shankaraiah N. Ru(II)-Catalyzed Regioselective Hydroxymethylation of β-Carbolines and Isoquinolines via C-H Functionalization: Probing the Mechanism by Online ESI-MS/MS Screening. J Org Chem 2019; 84:5504-5513. [PMID: 30945857 DOI: 10.1021/acs.joc.9b00454] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Ru(II)-catalyzed regioselective C-H activation toward hydroxymethylation of β-carbolines and isoquinolines as effective directing groups has been developed, and the mechanism was probed by using online electrospray ionization-tandem mass spectrometry. The introduction of the hydroxymethyl group in the biologically relevant molecules routed via C-H functionalization remains an important task. Gratifyingly, this protocol draws attention to the regioselective formation of monohydroxymethylated β-carboline/isoquinoline products exclusively.
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Affiliation(s)
- Ramya Tokala
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Hyderabad 500037 , India
| | - Darshana Bora
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Hyderabad 500037 , India
| | - Sravani Sana
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Hyderabad 500037 , India
| | - Fabiane M Nachtigall
- Instituto de Ciencias Químicas Aplicadas , Universidad Autónoma de Chile , Sede Talca 3467987 , Chile
| | - Leonardo S Santos
- Instituto de Química de Recursos Naturales , Universidad de Talca , Talca 3462227 , Chile
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Hyderabad 500037 , India
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10
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11
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Mani GS, Donthiboina K, Shankaraiah N, Kamal A. Iodine-promoted one-pot synthesis of 1,3,4-oxadiazole scaffolds via sp3 C–H functionalization of azaarenes. NEW J CHEM 2019. [DOI: 10.1039/c9nj03573g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient metal-free one-pot protocol has been developed for the construction of 1,3,4-oxadiazole derivatives via iodine-mediated oxidative amination of benzylic C–H bonds of azaarenes.
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Affiliation(s)
- Geeta Sai Mani
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
| | - Kavitha Donthiboina
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
| | - Ahmed Kamal
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
- Medicinal Chemistry and Pharmacology
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12
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Structural Diversity in Ruthenium-Catalyzed Asymmetric Transfer Hydrogenation Reactions. TOP ORGANOMETAL CHEM 2019. [DOI: 10.1007/3418_2019_27] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Computational study on the synthesis of 1-phenyl-3,4-dihydro-β-carboline: T3P®-promoted one-pot formation from tryptamine vs. POCl3-mediated ring closure of Nb-benzoyltryptamine. The first DFT investigation of the Bischler-Napieralski reaction. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Synthetic study on the T3P®-promoted one-pot preparation of 1-substituted-3,4-dihydro-β-carbolines by the reaction of tryptamine with carboxylic acids. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Elhady AK, Sigler SC, Noureldin N, Canzoneri JC, Ahmed NS, Piazza GA, Abadi AH. Structure-Based Design of Novel Tetrahydro-Beta-Carboline Derivatives with a Hydrophilic Side Chain as Potential Phosphodiesterase Inhibitors. Sci Pharm 2015; 84:428-446. [PMID: 28117310 PMCID: PMC5064235 DOI: 10.3390/scipharm84030428] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 09/26/2015] [Indexed: 11/24/2022] Open
Abstract
Tadalafil is a clinically approved phosphodiesterase-5 inhibitor for the treatment of erectile dysfunction and pulmonary arterial hypertension. It contains two chiral carbons, and the marketed isomer is the 6R, 12aR isomer with a methyl substituent on the terminal nitrogen of the piperazinedione ring. In this report, tadalafil analogues with an extended hydrophilic side chain on the piperazine nitrogen were designed to interact with particular hydrophilic residues in the binding pocket. This leads to analogues with moderate inhibitory activity on phosphodiesterase-5, even for isomers in which chiral carbons are of the S configuration.
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Affiliation(s)
- Ahmed K Elhady
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt.
| | - Sara C Sigler
- Department of Oncologic Sciences and Pharmacology, Drug Discovery Research Center, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36608, USA.
| | - Nazih Noureldin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt.
| | - Joshua C Canzoneri
- Department of Oncologic Sciences and Pharmacology, Drug Discovery Research Center, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36608, USA.
| | - Nermin S Ahmed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt.
| | - Gary A Piazza
- Department of Oncologic Sciences and Pharmacology, Drug Discovery Research Center, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36608, USA.
| | - Ashraf H Abadi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt.
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16
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Design and synthesis of dithiocarbamate linked β-carboline derivatives: DNA topoisomerase II inhibition with DNA binding and apoptosis inducing ability. Bioorg Med Chem 2015; 23:5511-26. [DOI: 10.1016/j.bmc.2015.07.037] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/17/2015] [Accepted: 07/19/2015] [Indexed: 12/21/2022]
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17
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Kamal A, Sathish M, Prasanthi AVG, Chetna J, Tangella Y, Srinivasulu V, Shankaraiah N, Alarifi A. An efficient one-pot decarboxylative aromatization of tetrahydro-β-carbolines by using N-chlorosuccinimide: total synthesis of norharmane, harmane and eudistomins. RSC Adv 2015. [DOI: 10.1039/c5ra16221a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A mild one-pot synthesis of β-carbolines from their tetrahydro-β-carboline acids has been developed via decorboxylative aromatization using N-chlorosuccinimide (NCS).
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Affiliation(s)
- Ahmed Kamal
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Department of Medicinal Chemistry
| | - Manda Sathish
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - A. V. G. Prasanthi
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Jadala Chetna
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Yellaiah Tangella
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Vunnam Srinivasulu
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Abdullah Alarifi
- Catalytic Chemistry Research Chair
- Chemistry Department
- College of Science
- King Saud University
- Riyadh 11451
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18
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Mirabal-Gallardo Y, Soriano MDPC, Santos LS. Stereoselective bioreduction of β-carboline imines through cell-free extracts from earthworms (Eisenia foetida). ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Enantioselective total synthesis of (S)-(+)-lennoxamine through asymmetric hydrogenation mediated by l-proline-tetrazole ruthenium catalyst. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Rosenberg AJ, Zhao J, Clark DA. Synthesis of Imidazo[4,5-b]pyridines and Imidazo[4,5-b]pyrazines by Palladium Catalyzed Amidation of 2-Chloro-3-amino-heterocycles. Org Lett 2012; 14:1764-7. [DOI: 10.1021/ol300359s] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Adam J. Rosenberg
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
| | - Jinbo Zhao
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
| | - Daniel A. Clark
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
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21
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Sheng R, Zhu J, Hu Y. Mild and efficient Winterfeldt oxidation of 1,2,3,4-tetrahydro-γ-carbolines for the synthesis of dihydropyrrolo[3,2-b]-quinolones and pyrrolo[3,2-b]quinolones. Molecules 2012; 17:1177-90. [PMID: 22290301 PMCID: PMC6268283 DOI: 10.3390/molecules17021177] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 01/15/2012] [Accepted: 01/17/2012] [Indexed: 11/16/2022] Open
Abstract
The Winterfeldt oxidation (NaOH, DMF, air, rt) of substituted 1,2,3,4-tetrahydro-γ-carbolines has been developed, which provides a convenient and efficient method for the synthesis of the corresponding dihydropyrrolo[3,2-b]quinolones in moderate to excellent yields (38–94%). The generality and substrate scope of this reaction are explored and a possible mechanism is proposed. The results imply that electron-withdrawing groups on N2 of tetrahydro-γ-carbolines and N5-H are necessary. The synthesis of 5 or 7-substituted pyrrolo[3,2-b]quinolones in near quantitative yields was also achieved through deprotection and aromatization of N1-boc-dihydropyrrolo[3,2-b]quinolones.
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Affiliation(s)
| | | | - Yongzhou Hu
- Author to whom correspondence should be addressed; ; Tel.: +86-571-8820-8460; Fax: +86-571-8820-8460
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22
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23
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Espinoza-Moraga M, Caceres AG, Santos LS. Palladium asymmetric reduction of β-carboline imines mediated by chiral auxiliaries assisted by microwave irradiation. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.181] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Antiproliferative activity of arborescidine alkaloids and derivatives. Eur J Med Chem 2009; 44:3810-5. [DOI: 10.1016/j.ejmech.2009.04.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 03/18/2009] [Accepted: 04/02/2009] [Indexed: 11/21/2022]
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25
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da Silva WA, Rodrigues MT, Shankaraiah N, Ferreira RB, Andrade CKZ, Pilli RA, Santos LS. Novel Supramolecular Palladium Catalyst for the Asymmetric Reduction of Imines in Aqueous Media. Org Lett 2009; 11:3238-41. [DOI: 10.1021/ol9011772] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wender A. da Silva
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - Manoel T. Rodrigues
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - N. Shankaraiah
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - Renan B. Ferreira
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - Carlos Kleber Z. Andrade
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - Ronaldo A. Pilli
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
| | - Leonardo S. Santos
- Laboratory of Asymmetric Synthesis, Chemistry Institute of Natural Resources, Universidad de Talca, Talca, PO Box 747, Talca, Chile, Institute of Chemistry, Universidade de Brasília, UnB, Brasília, Brazil, and Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP, Campinas, Brazil
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