1
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Halimehjani AZ, Breit B. Rhodium-catalyzed diastereoselective synthesis of highly substituted morpholines from nitrogen-tethered allenols. Chem Commun (Camb) 2023; 59:4376-4379. [PMID: 36946522 DOI: 10.1039/d3cc00151b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Rhodium-catalyzed intramolecular cyclization of nitrogen-tethered allenols was investigated for the synthesis of functionalized morpholines. By using this strategy, various N-protected 2,5- and 2,6-disubstituted as well as 2,3,5- and 2,5,6-trisubstituted morpholines were obtained via an atom-economic pathway with high to excellent yields, diastereo- and enantioselectivities (up to 99% yield, up to >99 : 1 dr and up to >99.9 ee). The utilities of the synthesized morpholines in ozonolysis, hydration, metathesis and epoxidation reactions were also investigated.
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Affiliation(s)
- A Ziyaei Halimehjani
- Department of Chemistry, Sharif University of Technology, P.O. Box 11155-9516, Tehran, Iran.
- Faculty of Chemistry, Kharazmi University, 49 Mofateh Street, P. O. Box 15719-14911, Tehran, Iran.
| | - B Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albert strasse 21, Freiburg im Breisgau, 79104, Germany.
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2
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Chatterjee I, Ali K, Panda G. A Synthetic Overview of Benzoxazines and Benzoxazepines as Anticancer Agents. ChemMedChem 2023; 18:e202200617. [PMID: 36598081 DOI: 10.1002/cmdc.202200617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023]
Abstract
Benzoxazines and benzoxazepines are nitrogen and oxygen-containing six and seven-membered benzo-fused heterocyclic scaffolds, respectively. Benzoxazepines and benzoxazines are well-known pharmacophores in pharmaceutical chemistry, which are of significant interest and have been extensively studied because of their promising activity against various diseases including their wide range of anticancer activity. Several reports are known for synthesizing benzoxazine and benzoxazepine-based compounds in the literature. Herein this review provides a critical analysis of synthetic strategies towards benzoxazines and benzoxazepines along with various ranges of anticancer activities based on these molecules that have been reported from 2010 onwards. This review also focuses on the structure-activity relationship of the benzoxazine and benzoxazepine scaffolds containing bioactive compounds and describes how the structural modification affects their anticancer activity.
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Affiliation(s)
- Indranil Chatterjee
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute Sector-10, Jankipuram Extension, Lucknow, 226031, India
| | - Kasim Ali
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute Sector-10, Jankipuram Extension, Lucknow, 226031, India.,AcSIR-Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Gautam Panda
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute Sector-10, Jankipuram Extension, Lucknow, 226031, India.,AcSIR-Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
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3
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Nonnhoff J, Stammler HG, Gröger H. Enantioselective Synthesis of Thiomorpholines through Biocatalytic Reduction of 3,6-Dihydro-2 H-1,4-thiazines Using Imine Reductases. J Org Chem 2022; 87:11369-11378. [PMID: 35969670 DOI: 10.1021/acs.joc.2c00839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, an enantioselective biocatalytic synthesis of chiral thiomorpholines using imine reductases (IREDs) is described. As substrates, four prochiral and one chiral 3,6-dihydro-2H-1,4-thiazines were synthesized in a modified Asinger reaction and subsequently reduced using imine reductases as a biocatalyst, NADPH as a cofactor, and a glucose dehydrogenase (GDH)-glucose cofactor regeneration system. As a result, chiral thiomorpholines with a stereogenic center created in 3-position were obtained under mild process conditions with high conversions and excellent enantioselectivities of up to 99%. Furthermore, as a proof of concept, a sequential one-pot process combining both individual reaction steps was achieved.
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Affiliation(s)
- Jannis Nonnhoff
- Chair of Industrial Organic Chemistry and Biotechnology, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Hans-Georg Stammler
- Inorganic and Structural Chemistry, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Harald Gröger
- Chair of Industrial Organic Chemistry and Biotechnology, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
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4
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Kumar A, Bhattacherjee S, Ganesher A, Manda SLK, Banerjee A, Panda G. Use of Non‐Aromatic Hydrophobic α‐Amino Acids (α‐AA) and Non‐Amino Acid Derived Synthons: Comparative Studies Towards Total Syntheses of Selected Bioactive Natural Alkaloids. ChemistrySelect 2022. [DOI: 10.1002/slct.202104281] [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)
- Amit Kumar
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
| | - Sandeep Bhattacherjee
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
| | - Asha Ganesher
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
| | - Srinivas Lavanya Kumar Manda
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
| | - Arpita Banerjee
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
| | - Gautam Panda
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Jankipuram Extension Lucknow 226031 UP India
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5
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Satei A, Soltanabadi A. Density, excess volume, thermal expansion coefficient and intermolecular hydrogen bonding of binary mixtures of morpholine + isobutanol: A combined experimental and computational study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Potential bacterial biofilm, MRSA, and DHFR inhibitors based on new morpholine-linked chromene-thiazole hybrids: One-pot synthesis and in silico study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131476] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Jana AK, Singh J, Ganesher A, Kumar A, Banerjee A, Kumar D, Verma SK, Sharma AK, Bhatta RS, Konwar R, Panda G. Tyrosine-Derived Novel Benzoxazine Active in a Rat Syngenic Mammary Tumor Model of Breast Cancer. J Med Chem 2021; 64:16293-16316. [PMID: 34726897 DOI: 10.1021/acs.jmedchem.1c01624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In continuing efforts of improving benzoxazepine derivatives as an anti-breast cancer agent, a new chemical entity, benzoxazine, was designed from scaffold morphing. Structure-activity relationship studies revealed that H, -OMe, -CF3, and -F were well tolerated on R1 and R2 positions of ring A, and R2 as -CH2CH2N(CH2)4 (N-ethyl pyrrolidine) and -CH2CH2N(CH2)5 (N-ethyl piperidine) chains on ring D increased activities (Series B, Figure 3). 13d selected as a lead compound (IC50: 0.20 to 0.65 μM) induces apoptosis, cell cycle arrest, and loss of mitochondrial membrane potential in breast cancer cells. Compound 13d was formulated into 13d-f using cyclodextrin to improve its solubility for a pharmacokinetic, in vivo efficacy study. Both 13d and 13d-f regressed tumor growth at concentrations of 5 and 20 mg/kg better than tamoxifen without any mortality in a rat syngenic mammary tumor model. Collectively, our data suggest that tyrosine-derived novel benzoxazine 13d could be a potential lead for the treatment of breast cancer and hence deserve further in-depth studies.
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Affiliation(s)
- Amit Kumar Jana
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India
| | - Jyotsana Singh
- Endocrinology Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India.,AcSIR-Academy of Scientific & Innovative Research, Ghaziabad 201002, Uttar Pradesh, India
| | - Asha Ganesher
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India
| | - Amit Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India
| | - Arpita Banerjee
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India
| | - Deepak Kumar
- Endocrinology Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India
| | - Sarvesh Kumar Verma
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India
| | - Ashok Kumar Sharma
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India
| | - Rabi Sankar Bhatta
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India
| | - Rituraj Konwar
- Endocrinology Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India.,AcSIR-Academy of Scientific & Innovative Research, Ghaziabad 201002, Uttar Pradesh, India
| | - Gautam Panda
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 10 Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226031, India.,AcSIR-Academy of Scientific & Innovative Research, Ghaziabad 201002, Uttar Pradesh, India
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8
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Quest for steroidomimetics: Amino acids derived steroidal and nonsteroidal architectures. Eur J Med Chem 2017; 133:139-151. [DOI: 10.1016/j.ejmech.2017.03.054] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/21/2017] [Accepted: 03/24/2017] [Indexed: 11/18/2022]
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9
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Saikia AK, Deka MJ, Borthakur U. Highly regioselective synthesis of 4-tosylthiomorpholine via intramolecular cyclization of N-tethered thioalkenols. Org Biomol Chem 2016; 14:10489-10495. [PMID: 27762410 DOI: 10.1039/c6ob01869f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A one-pot, metal-free procedure has been developed for the synthesis of 4-tosylthiomorpholine from N-tethered thioalkenols via bromination, cyclization and subsequent elimination reaction in good yields. The reaction is found to be highly regioselective.
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Affiliation(s)
- Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Manash J Deka
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Upasana Borthakur
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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10
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Bosset C, Lefebvre G, Angibaud P, Stansfield I, Meerpoel L, Berthelot D, Guérinot A, Cossy J. Iron-Catalyzed Synthesis of Sulfur-Containing Heterocycles. J Org Chem 2016; 82:4020-4036. [DOI: 10.1021/acs.joc.6b01827] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cyril Bosset
- Laboratoire
de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris, CNRS, PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
| | - Gauthier Lefebvre
- Laboratoire
de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris, CNRS, PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
| | - Patrick Angibaud
- Janssen Research & Development, Oncology Discovery Chemistry, Campus de Maigremont CS 10615, 27106 Cedex, Val de Reuil, France
| | - Ian Stansfield
- Janssen Research & Development, Oncology Discovery Chemistry, Campus de Maigremont CS 10615, 27106 Cedex, Val de Reuil, France
| | - Lieven Meerpoel
- Janssen Research & Development, Janssen Pharmaceutica NV Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Didier Berthelot
- Janssen Research & Development, Oncology Discovery Chemistry, Campus de Maigremont CS 10615, 27106 Cedex, Val de Reuil, France
| | - Amandine Guérinot
- Laboratoire
de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris, CNRS, PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire
de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris, CNRS, PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
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11
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Mari G, Favi G, Crescentini LD, Santeusanio S, Attanasi OA, Mantellini F. Facile, Odourless, Quantitative Synthesis of 3-Hydroxy-3,4-dihydro-2H
-1,4-thiazines. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600115] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Giacomo Mari
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
| | - Gianfranco Favi
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
| | - Lucia De Crescentini
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
| | - Stefania Santeusanio
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
| | - Orazio A. Attanasi
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
| | - Fabio Mantellini
- Biomolecular Science Department; Organic Chemistry and Organic Natural Compounds Section; University of Urbino “Carlo Bo”; Via I Maggetti 24 61029 Urbino Pesaro and Urbino Italy
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12
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Lenci E, Menchi G, Trabocchi A. Carbohydrates in diversity-oriented synthesis: challenges and opportunities. Org Biomol Chem 2016; 14:808-25. [DOI: 10.1039/c5ob02253c] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Carbohydrates are attractive building blocks for diversity-oriented synthesis due to their stereochemical diversity and high density of polar functional groups.
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Affiliation(s)
- E. Lenci
- Department of Chemistry “Ugo Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - G. Menchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - A. Trabocchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
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13
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Kishore Vandavasi J, Hu WP, Chandru Senadi G, Chen HT, Chen HY, Hsieh KC, Wang JJ. Aryl λ3-Iodane-Mediated 6-exo-trigCyclization to Synthesize Highly Substituted Chiral Morpholines. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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14
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Belavagi NS, Panchamukhi SI, Deshapande N, Sunagar MG, Gaonkar S, Khazi IAM. Enantioselective synthesis of 6-substituted thiomorpholin-3-ones via asymmetric thia-Michael addition reactions using chiral bifunctional thiourea catalysts followed by intramolecular reductive cyclization. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Deka MJ, Indukuri K, Sultana S, Borah M, Saikia AK. Synthesis of Five-, Six-, and Seven-Membered 1,3- and 1,4-Heterocyclic Compounds via Intramolecular Hydroalkoxylation/Hydrothioalkoxylation of Alkenols/Thioalkenols. J Org Chem 2015; 80:4349-59. [DOI: 10.1021/acs.joc.5b00049] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manash J. Deka
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Kiran Indukuri
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Sabera Sultana
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Madhurjya Borah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Anil K. Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
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16
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Doveston RG, Tosatti P, Dow M, Foley DJ, Li HY, Campbell AJ, House D, Churcher I, Marsden SP, Nelson A. A unified lead-oriented synthesis of over fifty molecular scaffolds. Org Biomol Chem 2015; 13:859-65. [DOI: 10.1039/c4ob02287d] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Sourcing large numbers of lead-like compounds is a major challenge; a unified synthetic approach enabled the efficient synthesis of 52 diverse lead-like molecular scaffolds from just 13 precursors.
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Affiliation(s)
| | | | - Mark Dow
- School of Chemistry
- University of Leeds
- Leeds
- UK
| | | | - Ho Yin Li
- School of Chemistry
- University of Leeds
- Leeds
- UK
| | | | - David House
- GlaxoSmithKline Medicines Research Centre
- Stevenage
- UK
| | - Ian Churcher
- GlaxoSmithKline Medicines Research Centre
- Stevenage
- UK
| | | | - Adam Nelson
- School of Chemistry
- University of Leeds
- Leeds
- UK
- Astbury Centre for Structural Molecular Biology
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17
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Frongia A, Melis N, Serra I, Secci F, Piras PP, Caboni P. Organocatalytic Asymmetric Condensation/Keto-Enol Tautomerization Tandem Reaction: Access to Cyclobutanone α-Amino Acid Ester Derivatives. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201400020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Bera S, Panda G. A rapid entry to amino acid derived diverse 3,4-dihydropyrazines and dihydro[1,2,3]triazolo[1,5-a]pyrazines through 1,3-dipolar cycloaddition. Org Biomol Chem 2014; 12:3976-85. [DOI: 10.1039/c4ob00639a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Practical synthesis of diverse 3,4-dihydropyrazines, 6,7-dihydro-[1,2,3]triazolopyrazines and 7,8-dihydro-[1,2,3]triazolodiazepines through intramolecular 1,3-dipolar cycloaddition from amino acid derived intermediates is described.
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Affiliation(s)
- Saurav Bera
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
| | - Gautam Panda
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
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19
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Manna SK, Panda G. Synthesis of enantiomerically enriched indolines and tetrahydroisoquinolines from (S)-amino acid-derived chiral carbocations: an easy access to (3S,4R)-demethoxy-3-isopropyl diclofensine. Org Biomol Chem 2014; 12:8318-24. [DOI: 10.1039/c4ob00922c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enantiomerically enriched indolines and tetrahydroisoquinolines were synthesized in high yields from easily accessible (S)-amino acid-derived chiral carbocations.
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Affiliation(s)
- Sudipta Kumar Manna
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
| | - Gautam Panda
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
- Academy of Scientific and Innovative Research
- New Delhi 110001, India
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20
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Pal’chikov VA. Morpholines. Synthesis and biological activity. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1070428013060018] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Borzenko A, Pajouhesh H, Morrison JL, Tringham E, Snutch TP, Schafer LL. Modular, efficient synthesis of asymmetrically substituted piperazine scaffolds as potent calcium channel blockers. Bioorg Med Chem Lett 2013; 23:3257-61. [PMID: 23639535 DOI: 10.1016/j.bmcl.2013.03.114] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Revised: 03/23/2013] [Accepted: 03/27/2013] [Indexed: 11/28/2022]
Abstract
A novel approach to the synthesis of substituted piperazines and their investigation as N-type calcium channel blockers is presented. A common scaffold exhibiting high activity as N-type blockers is N-substituted piperazine. Using recently developed titanium and zirconium catalysts, we describe the efficient and modular synthesis of 2,5-asymmetrically disubstituted piperazines from simple amines and alkynes. The method requires only three isolation/purification protocols and no protection/deprotection steps for the diastereoselective synthesis of 2,5-dialkylated piperazines in moderate to high yield. Screening of the synthesized piperazines for N-type channel blocking activity and selectivity shows the highest activity for a compound with a benzhydryl group on the nitrogen (position 1) and an unprotected alcohol-functionalized side chain.
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Affiliation(s)
- Andrey Borzenko
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
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22
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Jana AK, Panda G. Stereoselective synthesis of Jaspine B and its C2 epimer from Garner aldehyde. RSC Adv 2013. [DOI: 10.1039/c3ra41778f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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23
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Manna SK, Panda G. An efficient synthetic approach for N–C bond formation from (S)-amino acids: an easy access to cis-2,5-disubstituted chiral piperazines. RSC Adv 2013. [DOI: 10.1039/c3ra42309c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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24
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McGhee A, Cochran BM, Stenmark TA, Michael FE. Stereoselective synthesis of 2,5-disubstituted morpholines using a palladium-catalyzed hydroamination reaction. Chem Commun (Camb) 2013; 49:6800-2. [DOI: 10.1039/c3cc44117b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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An efficient entry to highly substituted chiral 2-oxopiperazines from α-amino acids via iodocyclization. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.109] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sequeira FC, Chemler SR. Stereoselective synthesis of morpholines via copper-promoted oxyamination of alkenes. Org Lett 2012; 14:4482-5. [PMID: 22894680 PMCID: PMC3465956 DOI: 10.1021/ol301984b] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A new copper(II) 2-ethylhexanoate-promoted addition of an alcohol and an amine across an alkene (oxyamination) is reported. The alcohol addition is intramolecular, while coupling with the amine occurs intermolecularly. Several 2-aminomethyl morpholines were synthesized in good to excellent yields and diastereoselectivities.
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Affiliation(s)
- Fatima C. Sequeira
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260
| | - Sherry R. Chemler
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260
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