1
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Shimkin KW, Compton JS, Diccianni JB, Waldo JP, Jones WM, Krawczuk PJ, Rosano RJ. Rapid Synthesis of Highly Substituted 1,6-Naphthyridines Via Heteroaryl Ditriflates. J Org Chem 2024. [PMID: 39031089 DOI: 10.1021/acs.joc.4c01248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2024]
Abstract
We report the discovery of a convenient and efficient method for the synthesis of highly substituted 1,6-naphthyridines. A tandem nitrile hydration/cyclization procedure was developed to access 1,6-naphthyridine-5,7-diones under mild conditions. Subsequently, we have found that ditriflation of these intermediates provides 1,6-naphthyridine-5,7-ditriflates which are bench-stable but highly reactive intermediates that can be engaged in one-pot difunctionalization reactions leading to diverse drug-like products in rapid fashion.
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Affiliation(s)
- Kirk W Shimkin
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - Jordan S Compton
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - Justin B Diccianni
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - Jesse P Waldo
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - William M Jones
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - Paul J Krawczuk
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
| | - Robert J Rosano
- Therapeutics Discovery, Janssen Pharmaceutical Research and Development, Spring House, Pennsylvania 19477, United States
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2
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Beletskaya IP, Ananikov VP. Transition-Metal-Catalyzed C–S, C–Se, and C–Te Bond Formations via Cross-Coupling and Atom-Economic Addition Reactions. Achievements and Challenges. Chem Rev 2022; 122:16110-16293. [DOI: 10.1021/acs.chemrev.1c00836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irina P. Beletskaya
- Chemistry Department, Lomonosov Moscow State University, Vorob’evy gory, Moscow 119899, Russia
| | - Valentine P. Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
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3
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Abstract
One-pot synthesis is an active topic in organic chemistry due to its intrinsic advantages of simple operation, high mass efficiency, low cost, and less amount of waste disposal. Among three kinds of one-pot syntheses, 1) cascade reactions, 2) multicomponent reactions (MCRs), and 3) one-pot stepwise synthesis (OPSS), OPSS could be more flexible and practical since it is carried out stepwisely and have variable reaction conditions for different steps. This perspective article uses selected examples to highlight the recent development in OPSS involving cyclization, cycloaddition, rearrangement, and catalytic reactions for the synthesis of heterocyclic scaffolds, asymmetric molecules, natural products, and bioactive compounds.
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4
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Rakshit A, Dhara HN, Sahoo AK, Patel BK. The Renaissance of Organo Nitriles in Organic Synthesis. Chem Asian J 2022; 17:e202200792. [PMID: 36047749 DOI: 10.1002/asia.202200792] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/31/2022] [Indexed: 11/11/2022]
Abstract
In the arena of functional group-oriented organic synthesis, the nitrile or cyano functionality is of immense importance. The presence of nucleophilic N -atom, π-coordinating ability of the triple bond, and electrophilic C-center imparts unique and interesting reactivity. Owing to the ability of the nitrile to transform into various other functional groups or intermediates, the chemistry is very rich and diverse. In particular, the involvement of nitrile in numerous organic reactions such as inter- or intramolecular alkyne insertion, [2 + 2 + 2] cycloaddition with alkynes, [3 + 2] cycloaddition with azides, [4 + 2] cycloaddition with diene allow the synthesis of many important carbocycles and heterocycles. Furthermore, the nitrile serves as a directing group in many C-H bond functionalization reactions to introduce diverse functionality and participate as a radical acceptor in radical cascade strategies to obtain a large variety of functional molecules. This review mainly focuses on the reactivity and diverse synthetic application of the nitrile including C-H bond functionalization, alkyne insertion, cycloaddition, and thermal or photochemical cascade strategy. The objective of the current review aims at bringing out the striking collection of various nitrile-triggered organic transformations.
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Affiliation(s)
- Amitava Rakshit
- IIT Guwahati: Indian Institute of Technology Guwahati, Chemistry, INDIA
| | | | | | - Bhisma K Patel
- Indian Institute of Technology Guwahati, Chemistry, North Guwahati-781 039, 781 039, Guwahati, INDIA
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5
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Raji Reddy C, Ganesh V, Punna N. Domino Aza-Annulations of Enynyl-/(Alkynyl)aryl-acetonitriles to Access Nitrogen-Enriched Heterocycles. J Org Chem 2022; 87:11547-11557. [PMID: 35998892 DOI: 10.1021/acs.joc.2c01136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unprecedented domino aza-annulations of (E)-2-en-4-ynyl-acetonitriles (generated from the Morita-Baylis-Hillman acetates of propiolaldehydes for the first time) with sodium azide under metal- and oxidant-free conditions for the assembly of triazolo-pyridines are accomplished. The developed strategy offers broad substrate scope, extending to (2-alkynyl)aryl and indolyl-acetonitriles to provide the corresponding triazolo-fused isoquinolines and β-carbolines, respectively, in good yields. Additionally, the synthetic utility of the products is demonstrated via denitrogenative coupling of fused triazoles with different nucleophiles.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Veeramalla Ganesh
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Nagender Punna
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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6
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Hess A, Guelen HC, Alandini N, Mourati A, Guersoy YC, Knochel P. Preparation of Polyfunctionalized Aromatic Nitriles from Aryl Oxazolines. Chemistry 2021; 28:e202103700. [PMID: 34766655 PMCID: PMC9300023 DOI: 10.1002/chem.202103700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Indexed: 12/17/2022]
Abstract
A selective ortho,ortho’‐functionalization of readily available aryl oxazolines by two successive magnesiations with sBu2Mg in toluene followed by trapping reactions with electrophiles, such as (hetero)aryl iodides or bromides, iodine, tosyl cyanide, ethyl cyanoformate or allylic bromides (39 examples, 62–99 % yield) is reported. Treatment of these aryl oxazolines with excess oxalyl chloride and catalytic amounts of DMF (50 °C, 4 h) provided the corresponding nitriles (36 examples, 73–99 % yield). Conversions of these nitriles to valuable heterocycles are reported, and a tentative mechanism is proposed.
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Affiliation(s)
- A Hess
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - H C Guelen
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - N Alandini
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - A Mourati
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Y C Guersoy
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - P Knochel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
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7
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Na2S·9H2O mediated facile synthesis of 1,3-dihydrofuro[3,4-b]quinoline derivatives via domino reduction approach. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Singh R, Sharma VP, Yadav P, Sonker P, Singh RM, Tewari AK. Sodium sulphide promoted synthesis of fused quinoline at room temperature. Org Biomol Chem 2021; 19:8108-8112. [PMID: 34498656 DOI: 10.1039/d1ob01085a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, simple and eco-friendly strategy for the synthesis of thiopyrano[4,3-b]quinolin-1-ones and pyrrolo[3,4-b]quinolin-1-ones from 2-alkynylquinoline-3-carbonitriles and sodium sulphide (Na2S·9H2O) under catalyst-free conditions at room temperature has been described. In this reaction, a readily available inorganic salt (Na2S·9H2O) serves as the sulphur source and leads to the generation of diverse functionalized thiopyrano[4,3-b]quinolin-1-ones and pyrrolo[3,4-b]quinolin-1-ones in moderate to excellent yields through sulfuration, annulation, and aerial oxidation.
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Affiliation(s)
- Rashmi Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
| | - Vishal Prasad Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
| | - Priyanka Yadav
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
| | - Priyanka Sonker
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
| | - Radhey Mohan Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
| | - Ashish Kumar Tewari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India.
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9
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Devadoss T, Sowmya V, Bastati R. Synthesis of 1,6‐Naphthyridine and Its Derivatives: A Systematic Review. ChemistrySelect 2021. [DOI: 10.1002/slct.202004462] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Thangaraj Devadoss
- Department of Pharmaceutical Chemistry KVSR Siddhartha College of Pharmaceutical Sciences Pinnamaneni Polyclinic Road, Siddhartha Nagar, Vijayawada Andhra Pradesh India, PIN- 520010
| | - Veldhi Sowmya
- Department of Pharmaceutical Chemistry KVSR Siddhartha College of Pharmaceutical Sciences Pinnamaneni Polyclinic Road, Siddhartha Nagar, Vijayawada Andhra Pradesh India, PIN- 520010
| | - Ravali Bastati
- Department of Pharmaceutical Chemistry KVSR Siddhartha College of Pharmaceutical Sciences Pinnamaneni Polyclinic Road, Siddhartha Nagar, Vijayawada Andhra Pradesh India, PIN- 520010
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10
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Lavanya M, Lin C, Mao J, Thirumalai D, Aabaka SR, Yang X, Mao J, Huang Z, Zhao J. Synthesis and Anticancer Properties of Functionalized 1,6-Naphthyridines. Top Curr Chem (Cham) 2021; 379:13. [PMID: 33624162 DOI: 10.1007/s41061-020-00314-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 11/12/2020] [Indexed: 12/29/2022]
Abstract
The burgeoning interest in synthesis and biological applications of 1,6-naphthyridines reflects the importance of 1,6-naphthyridines in the synthetic as well as medicinal chemistry fields. Specially, 1,6-naphthyridines are pharmacologically active, with variety of applications such as anticancer, anti-human immunodeficiency virus (HIV), anti-microbial, analgesic, anti-inflammatory and anti-oxidant activities. Although collective recent synthetic developments have paved a path to a wide range of functionalized 1,6-naphthyridines, a complete correlation of synthesis with biological activity remains elusive. The current review focuses on recent synthetic developments from the last decade and a thorough study of the anticancer activity of 1,6-naphthyridines on different cancer cell lines. Anticancer activity has been correlated to 1,6-naphthyridines using the literature on the structure-activity relationship (SAR) along with molecular modeling studies. Exceptionally, at the end of this review, the utility of 1,6-naphthyridines displaying activities other than anticancer has also been included as a glimmering extension.
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Affiliation(s)
- Mallu Lavanya
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China.,School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, People's Republic of China
| | - Chong Lin
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China.
| | - Jincheng Mao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China.
| | | | - Sreenath Reddy Aabaka
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China
| | - Xiaojiang Yang
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China
| | - Jinhua Mao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China
| | - Zhiyu Huang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, People's Republic of China
| | - Jinzhou Zhao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Xindu, People's Republic of China
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11
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Hsieh JC. Transition-Metal-Catalyzed Addition/Cyclization Reactions of the C-N Multiple Bonds Containing Species. CHEM REC 2021; 21:3370-3381. [PMID: 33570231 DOI: 10.1002/tcr.202100008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 01/23/2023]
Abstract
This article describes our research work for the past decade, which involves the transition-metal-catalyzed cyclization reactions of the C-N multiple bonds containing species and their synthetic applications to access various heterocyclic compounds. The concepts of reactions including four types of coupling with a subsequent cyclization are (1) the transition-metal performs as a Lewis acid to activate a nitrile and accelerate the nucleophilic addition, (2) the transition-metal-catalyzed 1,2-insertion reaction of nitrile, (3) the Cu-catalyzed C-N coupling reaction of imine, and (4) the Co-catalyzed addition/cyclization reaction of imine. These methods can be used to synthesize various N-containing aromatic heterocycles with higher efficiency, and can be applied to the synthesis of relevent natural alkaloids, their derivatives as well as biologically active compounds.
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Affiliation(s)
- Jen-Chieh Hsieh
- Department of Chemistry, Tamkang University, New Taipei City, 25137, Taiwan (R.O.C
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12
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Mishra P, Chatterjee S, Verma AK. 2-Alkynylarylnitrile: An Emerging Precursor for the Generation of Carbo- and Heterocycles. ACS OMEGA 2020; 5:32133-32139. [PMID: 33376851 PMCID: PMC7758905 DOI: 10.1021/acsomega.0c04242] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
In the pursuit of a coherent synthetic route for the synthesis of carbo- and heterocycles, 2-alkynylarylnitrile has been recognized as a useful and versatile building block in organic synthesis due to the dual capacity of this precursor to act with a nucleophilic of electrophilic nature. The alkynes implanted at the ortho position improved the reactivity of the substrate for tandem cyclization and annulations, which led to the synthesis of diverse and complex cyclic compounds. This mini review summarizes the literature on the synthetic transformations of 2-alkynylarylnitrile into biologically relevant heterocycles as well as carbocycles such as isoindoles, isoquinolines, naphthalenes, and indenones as well as building blocks for the synthesis of various natural products. We hope that this concise review will be a promissory entry for future research in this area.
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13
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Structure-based design, synthesis, biological evaluation, and molecular docking of novel 10-methoxy dibenzo[b,h][1,6]naphthyridinecarboxamides. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02645-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Lipeeva AV, Shakirov MM, Shults EE. A facile approach to 6-amino-2 H-pyrano[2,3-g]isoquinolin-2-ones via a sequential Sonogashira coupling of 6-cyanoumbelliferone triflate and annulations with amines. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1661480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Alla V. Lipeeva
- Medicinal Chemistry Department, Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Makhmut M. Shakirov
- Medicinal Chemistry Department, Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Elvira E. Shults
- Medicinal Chemistry Department, Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
- Chemistry Department, Novosibirsk State University, Novosibirsk, Russian Federation
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15
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Kumar R, Chandra A, Mir BA, Shukla G. Cu(I)-Catalyzed Oxygen and Nitrogen Nucleophiles Triggered Regioselective Synthesis of Furo/Pyrrolo-Annulated Quinolines. J Org Chem 2019; 84:10710-10723. [PMID: 31389233 DOI: 10.1021/acs.joc.9b00662] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cu(I)-catalyzed intramolecular annulation of o-ethynylquinoline-3-carbaldehydes leads to the synthesis of alkoxy/imidazole-substituted 1,3-dihydrofuro[3,4-b]quinolines via C-O and C-N bond formation. The scope of the reaction was further extended to o-ethynylquinoline-3-carbonitriles for the synthesis of alkoxy-substituted 3H-pyrrolo[3,4-b]quinolines using alcohols as nucleophiles. These reactions are regioselectively favoring the 5-exo-dig cyclizations in all the annulation processes.
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Affiliation(s)
- Ritush Kumar
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Atish Chandra
- Centre of Biomedical Research , SGPGI Campus, Raibarely Road , Lucknow , Uttar Pradesh 226014 , India
| | - Bilal Ahmad Mir
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Gaurav Shukla
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
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16
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Mekheimer RA, Al-Sheikh MA, Medrasi HY, Bahatheg GA, Sadek KU. Chloroquinoline-3-carbonitriles: Synthesis and Reactions. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190516120946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We herein describe the first review which aims to focus soberly the various
synthetic methods and chemical reactions of chloroquinoline-3-carbonitrile derivatives.
The reactions are subdivided into groups that cover reactions of chloro substituent at 2 or
4 and 2,4 positions, as well as cyano substituent at 3 position and reactions which involve
both groups. Most types of reactions have been successfully applied and used in the production
of biologically active compounds.
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Affiliation(s)
- Ramadan A. Mekheimer
- Department of Chemistry, Faculty of Science, Minia University, Minia 61519, Egypt
| | - Mariam A. Al-Sheikh
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Hanadi Y. Medrasi
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Ghayah A. Bahatheg
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Kamal U. Sadek
- Department of Chemistry, Faculty of Science, Minia University, Minia 61519, Egypt
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17
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Jiang Y, Yu SW, Yang Y, Liu YL, Xu XY, Zhang XM, Yuan WC. Synthesis of polycyclic spirooxindoles via an asymmetric catalytic one-pot stepwise Aldol/chloroetherification/aromatization procedure. Org Biomol Chem 2019; 16:6647-6651. [PMID: 30179248 DOI: 10.1039/c8ob01713a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general method for the synthesis of chiral pentacyclic spirooxindoles containing a tetrahydropyrano[2,3-b]indole scaffold through a one-pot stepwise sequence from 3-(3-indolomethyl)oxindole, paraformaldehyde and NCS is reported. Furthermore, the pentacyclic spirooxindoles could be transformed to bispirooxindole and other structurally diverse spirocyclic oxindoles.
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Affiliation(s)
- Yan Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
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18
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Kumar R, Singh RM. Metal-free POCl3 promoted stereoselective hydrochlorination of ethynylated azaheterocycles. Org Biomol Chem 2019; 17:5990-5996. [DOI: 10.1039/c9ob00841a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient stereoselective hydrochlorination of ethynylated azaheterocycles was achieved using POCl3 as a chlorinating agent under metal-free reaction conditions.
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Affiliation(s)
- Ritush Kumar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
- Department of Chemistry
- Institute of Science
| | - Radhey M. Singh
- Department of Chemistry
- Institute of Science
- Centre of Advanced Study
- Banaras Hindu University
- Varanasi-221005
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19
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Bharath Kumar Reddy P, Ravi K, Mahesh K, Leelavathi P. Intramolecular Heck reaction: A facile sequential one-pot synthesis of 1,2,3,4-tetrahydrobenzo[b][1,6]naphthyridines. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.09.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Mishra K, Bharadwaj KC, Singh RM. Catalytic trifluoromethylation of aldehyde and potential application for pyrano[4,3-b]quionline synthesis. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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