1
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Rasool B, Zargar IA, Kundu S, Mukherjee D. Peroxodisulfate-assisted synthesis of 2-thiocyanato glycals and their transformation to C-2-thio acrylo/aryl nitrile-substituted glycals. Chem Commun (Camb) 2024; 60:8071-8074. [PMID: 38990064 DOI: 10.1039/d4cc02201g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
An efficient regioselective method to attach thiocyanato groups at the β-position of enol double bonds in sugar enol ethers using KSCN and potassium persulfate has been developed. The highly regioselective addition of the resulting sugar thiocyanate to electron rich species like terminal alkynes and benzynes under Pd catalysis generated C-2-thio acrylo/aryl nitrile glycals via simultaneous introduction of thio and cyano groups into carbon-carbon triple bonds.
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Affiliation(s)
- Bisma Rasool
- Natural Products and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Irshad Ahmad Zargar
- Natural Products and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sanchari Kundu
- Department of Chemical Sciences, Bose Institute Kolkata, EN 80, Sector V, Bidhan Nagar, Kolkata-700091, WB, India
| | - Debaraj Mukherjee
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
- Department of Chemical Sciences, Bose Institute Kolkata, EN 80, Sector V, Bidhan Nagar, Kolkata-700091, WB, India
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2
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Kumar S, Chhatwal RJ, Maity J, Senapati NN, Prasad AK. Fujiwara‐Moritani Assisted Synthesis of Conjugated 2,3‐Dihydrofuran Trienes and Corresponding 2,3‐Dihydrobenzofuran Derivative. ChemistrySelect 2023. [DOI: 10.1002/slct.202204064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sandeep Kumar
- Department of Chemistry University of Delhi Delhi 110007 India
| | | | - Jyotirmoy Maity
- Department of Chemistry St. Stephen's College University of Delhi – 110007 India
| | | | - Ashok K. Prasad
- Department of Chemistry University of Delhi Delhi 110007 India
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3
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Maheshwari M, Pandey RP, Hussain N. Pd-catalyzed direct functionalization of glycals with cycloalkenones: application to the synthesis of chiral phenanthrenones. Chem Commun (Camb) 2023; 59:627-630. [PMID: 36533688 DOI: 10.1039/d2cc05255e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A palladium-catalyzed direct C-H functionalization of glycals with cycloalkenones is described and a series of C-2 functionalized glycals were synthesized efficiently with cyclic enones. The direct C-H functionalization of glycals with Pd(II) and subsequent insertion of cyclic enones via β-hydride elimination is the key to the synthesis of 2C-branched glycals. The synthetic utility of this methodology for chiral phenanthrenones has also been demonstrated by coupling the synthesized 2C-branched glycals with arynes via 4+2 cycloaddition followed by concomitant pyran ring opening.
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Affiliation(s)
- Mittali Maheshwari
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India.
| | - Ram Pratap Pandey
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India.
| | - Nazar Hussain
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India.
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4
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Dubbu S, Santhi J, Hevey R. Carbohydrate‐Derived Dienes as Building Blocks for Pharmaceutically Relevant Molecules. Helv Chim Acta 2022. [DOI: 10.1002/hlca.202200135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sateesh Dubbu
- Department of Pharmaceutical Sciences Molecular Pharmacy University of Basel CH-4056 Basel Switzerland
| | - Jampani Santhi
- Department of Chemistry Department of Earth Ocean & Atmospheric Sciences The University of British Columbia Vancouver British Columbia, V6T 1Z1 Canada
| | - Rachel Hevey
- Department of Pharmaceutical Sciences Molecular Pharmacy University of Basel CH-4056 Basel Switzerland
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5
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Maikhuri VK, Maity J, Srivastava S, Prasad AK. Transition metal-catalyzed double C vinyl-H bond activation: synthesis of conjugated dienes. Org Biomol Chem 2022; 20:9522-9588. [PMID: 36412483 DOI: 10.1039/d2ob01646j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Conjugated dienes have occupied a pivotal position in the field of synthetic organic chemistry and medicinal chemistry. They act as important synthons for the synthesis of various biologically important molecules and therefore, gain tremendous attention worldwide. A wide range of synthetic routes to access these versatile molecules have been developed in the past decades. Transition metal-catalyzed cross-dehydrogenative coupling (CDC) has emerged as one of the utmost front-line research areas in current synthetic organic chemistry due to its high atom economy, efficiency, and viability. In this review, an up-to-date summary including scope, limitations, mechanistic studies, stereoselectivities, and synthetic applications of transition metal-catalyzed double Cvinyl-H bond activation for the synthesis of conjugated dienes has been reported since 2013. The literature reports mentioned in this review have been classified into three different categories, i.e. (a) Cvinyl-Cvinyl bond formation via oxidative homo-coupling of terminal alkenes; (b) Cvinyl-Cvinyl bond formation via non-directed oxidative cross-coupling of linear/cyclic alkenes and terminal/internal alkenes, and (c) Cvinyl-Cvinyl bond formation via oxidative cross-coupling of directing group bearing alkenes and terminal/internal alkenes. Overall, this review aims to provide a concise overview of the current status of the considerable development in this field and is expected to stimulate further innovation and research in the future.
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Affiliation(s)
- Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi-110007, India
| | - Smriti Srivastava
- Department of Chemistry, Acadia University, Wolfville, NS, B4P 2R6, Canada
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
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6
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Rath P, Rapp J, Brilisauer K, Braun M, Kolukisaoglu Ü, Forchhammer K, Grond S. Hybrid Chemoenzymatic Synthesis of C7-Sugars for Molecular Evidence of in vivo Shikimate Pathway Inhibition. Chembiochem 2022; 23:e202200241. [PMID: 35508894 PMCID: PMC9401589 DOI: 10.1002/cbic.202200241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Indexed: 11/22/2022]
Abstract
The design of distinctive chemical synthesis strategies aims for the most efficient routes towards versatile compounds in drug target studies. Here, we establish a powerful hybrid synthetic approach of total chemical and chemoenzymatic synthesis to efficiently obtain various 7‐deoxy‐sedoheptulose (7dSh, 1) analogues, unique C7 sugars, for structure‐activity relationship studies. 7dSh (1) is a rare microbial sugar with in planta herbicidal activity. As natural antimetabolite of 3‐dehydroquinate synthase (DHQS), 7dSh (1) inhibits the shikimate pathway, which is essential for the synthesis of aromatic amino acids in bacteria, fungi, and plants, but absent in mammals. As glyphosate, the most used chemical herbicide faces restrictions worldwide, DHQS has gained more attention as valid target of herbicides and antimicrobial agents. In vitro and in vivo analyses of the C7‐deoxysugars confirm DHQS as enzymatic target, highlight the crucial role of uptake for inhibition and add molecular aspects to target mechanism studies of C7‐sugars as our contribution to global efforts for alternative weed‐control strategies.
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Affiliation(s)
- Pascal Rath
- Eberhard Karls Universitat Tubingen, Institute of Organic Chemistry, Biomolecluar Chemistry, Auf der Morgenstelle 18, 72076, Tuebingen, GERMANY
| | - Johanna Rapp
- Eberhard Karls Universitat Tubingen, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), Auf der Morgenstelle 28, 72076, Tuebingen, GERMANY
| | - Klaus Brilisauer
- Eberhard Karls Universitat Tubingen, Institute of Organic Chemistry, Biomolecular Chemistry, Auf der Morgenstelle 18, 72076, Tuebingen, GERMANY
| | - Marvin Braun
- Eberhard Karls Universitat Tubingen, Center for Plant Molecular Biology (ZMBP), Auf der Morgenstelle 32, 72076, Tuebingen, GERMANY
| | - Üner Kolukisaoglu
- Eberhard Karls Universitat Tubingen, Center for Plant Molecular Biology (ZMBP), Auf der Morgenstelle 32, 72076, Tuebingen, GERMANY
| | - Karl Forchhammer
- Eberhard Karls Universitat Tubingen, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), Auf der Morgenstelle 28, 72076, Tuebingen, GERMANY
| | - Stephanie Grond
- Eberhard Karls Universität Tübingen Mathematisch-Naturwissenschaftliche Fakultät: Eberhard Karls Universitat Tubingen Mathematisch-Naturwissenschaftliche Fakultat, Institute of Organic Chemistry, Auf der Morgenstelle 18, 72076, Tübingen, GERMANY
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7
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Zargar IA, Hussain N, Mukherjee D. Conversion of Glycals to 2,3-Di-Substituted-3-Deoxy-Glycals via N-(Glycosyloxy) Acetamides Assisted C-2-Alkenylation and C-3-Nucleophilic Substitution. Chem Asian J 2022; 17:e202200350. [PMID: 35485806 DOI: 10.1002/asia.202200350] [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: 04/05/2022] [Indexed: 11/08/2022]
Abstract
Transformation of glycals to 2,3-di-substituted-3-dexoy-glycals were achieved by sequential C2 alkenylation of pseudoglycals followed by capture of nucleophiles at C3 position. Anomeric linked N-(glycosyloxy) acetamides group assisted innate C2-H activation of pseudoglycals under palladium catalysis is achieved. The synthesized C2 alkenylated products were further attacked by thio/amino nucleophiles at C3 position under basic conditions in stereo-selective fashion to generate 2,3-branched glycals with the elimination of directing groups and translocation of double bond. Different control experiments were conducted to establish the role of directing groups in C-H functionalization of pseudoglycals and reason for selectivity.
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Affiliation(s)
- Irshad Ahmad Zargar
- CSIR-Indian Institute of Integrative Medicine: Council of Scientific & Industrial Research Indian Institute of Integrative Medicine, Natural Product chemistry, INDIA
| | - Nazar Hussain
- Banaras Hindu University, Medicinal Chemistry, INDIA
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8
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Ahmed A, Sakander N, Rasool F, Hussain N, Mukherjee D. Diastereoselective synthesis of glycopyrans 1,2-annulated with dioxazinanes from 1,2-anhydrosugars and N-substituted nitrones. Org Biomol Chem 2022; 20:1436-1443. [PMID: 35081611 DOI: 10.1039/d1ob02310a] [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
1,2-Annulated pyranose sugars fused with six membered rings have emerged as an important class of carbohydrates with wide biological and synthetic utility. We now describe zinc chloride catalyzed one pot diastereoselective synthesis of sugar fused dioxazinanes from 1,2-anhydro sugars and N-substituted aromatic nitrones. Various aromatic nitrones with different substituents undergo the reaction smoothly. The developed strategy works well with both ester and ether protection on the sugar and proceeds under mild reaction conditions. The mechanism seems to involve activation of the anhydrosugar by ZnCl2 for nucleophilic attack by the nitrone followed by cyclization.
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Affiliation(s)
- Ajaz Ahmed
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Norein Sakander
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Faheem Rasool
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Chemistry, Govt. College for Women, Parade Ground, Jammu-180001, India.,Higher Education Department, Govt. of Jammu and Kashmir, India
| | - Nazar Hussain
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Medicinal Chemistry, Faculty of Ayurveda, Instituteof Medical Sciences, Banaras Hindu University, Varanasi-221005, India
| | - Debaraj Mukherjee
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
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9
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Azeem Z, Mandal PK. Recent advances in palladium-catalyzed C(sp 3)/C(sp 2)-H bond functionalizations: access to C-branched glycosides. Org Biomol Chem 2022; 20:264-281. [PMID: 34904995 DOI: 10.1039/d1ob02142g] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Over the recent decades, tremendous interest has developed in the transformation of complex substrates by C-H activation and functionalization. In particular, palladium-catalyzed directing and non-directing group-assisted C-H functionalization has emerged as a powerful avenue to access C-branched glycosides. Due to the extreme complexity, delicate functionalities, and high stability of C-H bonds, site-selective functionalization of carbohydrate under mild conditions is highly desirable. The purpose of this review is to cover most of the recent advances in palladium-catalyzed C(sp3) and C(sp2)-H bond functionalizations for the synthesis of C-branched glycosides along with future directions.
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Affiliation(s)
- Zanjila Azeem
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extn, Sitapur Road, P.O. Box 173, Lucknow 226031, India. .,Academy of Scientific and Innovative Research, Ghaziabad-201002, India
| | - Pintu Kumar Mandal
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extn, Sitapur Road, P.O. Box 173, Lucknow 226031, India. .,Academy of Scientific and Innovative Research, Ghaziabad-201002, India
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10
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Kumar H, Dubey A, Prajapati G, Kant R, Ampapathi RS, Mandal PK. Regioselective direct sulfenylation of glycals using arylsulfonyl chlorides in the presence of triphenylphosphine: access to C2-thioaryl glycosides. NEW J CHEM 2022. [DOI: 10.1039/d1nj05228d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cheap and easily available arylsulfonyl chlorides as a sulfur source reductively couple with glycals in the presence of triphenylphosphine to afford C2-thioaryl glycosides.
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Affiliation(s)
- Harikesh Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Atul Dubey
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Gurudayal Prajapati
- NMR Centre, SAIF, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ravi S. Ampapathi
- NMR Centre, SAIF, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad-201002, India
| | - Pintu Kumar Mandal
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad-201002, India
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11
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Hussain N, Hussain A. Advances in Pd-catalyzed C-C bond formation in carbohydrates and their applications in the synthesis of natural products and medicinally relevant molecules. RSC Adv 2021; 11:34369-34391. [PMID: 35497292 PMCID: PMC9042403 DOI: 10.1039/d1ra06351k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 09/27/2021] [Indexed: 12/13/2022] Open
Abstract
Advances in the Pd-catalyzed synthesis of C-glycosides and branched sugars are summarized herein and the strategies are categorized based on named reactions or types of sugar moieties involved in the reactions. These include cross-coupling reactions, C-H activations, and carbonylative cross-coupling reactions. Applications of Pd-catalyzed C-glycosylation reactions are discussed in the synthesis of natural products and biologically active molecules such as bergenin, papulacandin D, and SGLT2-inhibitors. Important mechanistic cycles are drawn and the mechanisms for how Pd-activates the sugar moieties for various coupling partners are discussed. The directing group-assisted C-glycosylation and some intramolecular C-H activation reactions are also included.
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Affiliation(s)
- Nazar Hussain
- Department of Medicinal Chemistry, Faculty of Ayurveda, Institute of Medical Sciences, BHU Varanasi-221005 India
| | - Altaf Hussain
- Department of Chemistry, Govt. Degree College Poonch J&K India 185101
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12
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Shankar B, Khatri V, Kumar B, Maikhuri VK, Kumar A, Tomar R, Prasad AK. Synthesis and Structural Characterization of 1-( E-1-Arylpropenon-3-yl)-3,4,6-tri- O-benzyl-d-glucals and Their Transformation into Pentasubstituted (2 R,3 S,4 R)-Chromanes via Pd-Catalyzed Cross Dehydrogenative Coupling Reaction. ACS OMEGA 2021; 6:11248-11259. [PMID: 34056280 PMCID: PMC8153922 DOI: 10.1021/acsomega.1c00103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
We have developed an efficient methodology for the synthesis of (2R,3S,4R)-2-hydroxymethyl-3,4-dihydroxy-6-aryl-7-aroylchromanes in which the chirality at the C-2, C-3, and C-4 positions is being drawn from C-glucopyranosyl aldehyde, which in turn can be efficiently synthesized from d-glucose. Thus, the synthesis starts with the transformation of sugar aldehyde into 1-(E-1-arylpropenon-3-yl)-3,4,6-tri-O-benzyl-d-glucals using Claisen-Schmidt type condensation reaction with different acetophenones and then to 1,2-disubstituted glucals via Pd(II)-catalyzed cross dehydrogenative coupling reaction, which in turn has been efficiently converted into (2R,3S,4R)-chromanes via 6π-electrocyclization and in situ dehydrogenative aromatization.
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Affiliation(s)
- Bhawani Shankar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
- Department
of Chemistry, Deshbandhu College, University
of Delhi, Delhi 110019, India
| | - Vinod Khatri
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Banty Kumar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Vipin K. Maikhuri
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Amit Kumar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Rashmi Tomar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Ashok K. Prasad
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
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13
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Ghouilem J, de Robichon M, Le Bideau F, Ferry A, Messaoudi S. Emerging Organometallic Methods for the Synthesis of C-Branched (Hetero)aryl, Alkenyl, and Alkyl Glycosides: C-H Functionalization and Dual Photoredox Approaches. Chemistry 2020; 27:491-511. [PMID: 32813294 DOI: 10.1002/chem.202003267] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/31/2020] [Indexed: 12/15/2022]
Abstract
Transition-metal-catalyzed C-H functionalization and photoredox nickel dual catalysis have emerged as innovative and powerful avenues for the synthesis of C-branched glycosides. These two concepts have been recently established and provide efficient and mild methods for accessing a series of valuable complex C-branched glycosides of great interest. Herein, recent developments in the synthesis of C-branched aryl/alkenyl/alkyl glycosides through these two approaches are highlighted.
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Affiliation(s)
- Juba Ghouilem
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Morgane de Robichon
- CY Cergy-Paris Université, BioCIS, Equipe de Chimie Biologique, CNRS, 95000, Neuville sur Oise, France
| | - Franck Le Bideau
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Angélique Ferry
- CY Cergy-Paris Université, BioCIS, Equipe de Chimie Biologique, CNRS, 95000, Neuville sur Oise, France
| | - Samir Messaoudi
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
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14
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Singh AK, Kanaujiya VK, Tiwari V, Sabiah S, Kandasamy J. Development of Routes for the Stereoselective Preparation of β-Aryl- C-glycosides via C-1 Aryl Enones. Org Lett 2020; 22:7650-7655. [PMID: 32941050 DOI: 10.1021/acs.orglett.0c02843] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A wide range of enones derived from d-glucal, d-galactal, l-rhamnal, d-rhamnal, and l-arabinal underwent Heck-coupling with various arylboronic acids bearing electron-donating and -withdrawing groups in the presence of palladium acetate and 1,10-phenanthroline. These reactions provided synthetically useful C-1 aryl enones in good yields. Many sensitive functional groups as well as protecting groups present in arylboronic acids and enones, respectively, remained intact under optimized conditions. The stereoselective hydrogenation of C-1 aryl enones with Pd-C/H2 provides the β-isomer of 2-deoxy-aryl-C-glycosides in excellent yield. The C-1 aryl enones were also used as precursors for the synthesis of 2-hydroxy-β-aryl-C-glycosides. Regioselective C-2 halogenations and vinylations of C-1 aryl enones were achieved in excellent yields.
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Affiliation(s)
- Adesh Kumar Singh
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh 221005, India
| | - Vimlesh Kumar Kanaujiya
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh 221005, India
| | - Varsha Tiwari
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh 221005, India
| | | | - Jeyakumar Kandasamy
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh 221005, India
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15
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Darbem MP, Esteves HA, Oliveira IM, Stefani HA. α,β‐Unsaturated 2‐Ketoglycosides via Pd‐Catalyzed Carbonylative Heck Reaction of 2‐Iodoglycals. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000846] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mariana P. Darbem
- Departamento de Farmácia Faculdade de Ciências Farmacêuticas Universidade de São Paulo Av. Prof. Lineu Prestes, 580 05508‐000 São Paulo Brazil
| | - Henrique A. Esteves
- Departamento de Química Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes, 748 05508‐000 São Paulo Brazil
| | - Isadora M. Oliveira
- Departamento de Química Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes, 748 05508‐000 São Paulo Brazil
| | - Hélio A. Stefani
- Departamento de Farmácia Faculdade de Ciências Farmacêuticas Universidade de São Paulo Av. Prof. Lineu Prestes, 580 05508‐000 São Paulo Brazil
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16
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Hussain N, Ahmed A, Mukherjee D. 2‐Halo Glycals as “Synthon” for 2‐C‐Branched Sugar: Recent Advances and Applications in Organic Synthesis. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000195] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Nazar Hussain
- Department of Natural Product ChemistryCSIR-Indian Institute of Integrative Medicines Canal Road Jammu India
| | - Ajaz Ahmed
- Department of Natural Product ChemistryCSIR-Indian Institute of Integrative Medicines Canal Road Jammu India
| | - Debaraj Mukherjee
- Department of Natural Product ChemistryCSIR-Indian Institute of Integrative Medicines Canal Road Jammu India
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17
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Ahmed A, Hussain N, Bhardwaj M, Chhalodia AK, Kumar A, Mukherjee D. Palladium catalysed carbonylation of 2-iodoglycals for the synthesis of C-2 carboxylic acids and aldehydes taking formic acid as a carbonyl source. RSC Adv 2019; 9:22227-22231. [PMID: 35519467 PMCID: PMC9066652 DOI: 10.1039/c9ra03626a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/04/2019] [Indexed: 11/21/2022] Open
Abstract
Pd catalyzed carbonylative reaction of 2-iodo-glycals has been developed taking formic acid as a carbonyl source for the synthesis of 2-carboxylic acids of sugars by the hydroxycarbonylation strategy. The methodology was successfully extended to the synthesis of 2-formyl glycals by using a reductive carbonylation approach. Both ester and ether protected glycals undergo the reaction and furnished sugar acids in good yield which is otherwise not possible by literature methods. The C-2 sugar acids were successfully utilized for the construction of 2-amido glycals, 2-dipeptido-glycal by Ugi reaction and C-1 and C-2 branched glycosyl esters.
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Affiliation(s)
- Ajaz Ahmed
- Academy of Scientific and Innovative Research India
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
| | - Nazar Hussain
- Academy of Scientific and Innovative Research India
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
| | - Monika Bhardwaj
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
| | - Anuj Kumar Chhalodia
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
| | - Amit Kumar
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
| | - Debaraj Mukherjee
- Academy of Scientific and Innovative Research India
- Natural Product Chemistry Division, Indian Institute of Integrative Medicine India
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Hussain N, Bhardwaj M, Ahmed A, Mukherjee D. Synthesis of Sugar-Based Enones and Their Transformation into 3,5-Disubstituted Furans and 2-Acyl-Substituted 1,2,3-Trideoxy Sugars in the Presence of Lewis Acids. Org Lett 2019; 21:3034-3037. [PMID: 31002522 DOI: 10.1021/acs.orglett.9b00680] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pd-catalyzed carbonylative cross-coupling reactions of 2-iodoglycals have been developed for the synthesis of sugar-based arylones and ynones using formic acid as the carbonyl source. Whereas acetyl-protected arylones lead to the formation of highly substituted furan derivatives in the presence of Lewis acid, benzyl-protected arylones furnished the 3-deoxy sugar derivative. In the presence of nucleophiles, an attack took place on the C-1 or C-3 carbon regio- and stereoselectively depending on the nature of the nucleophiles.
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Affiliation(s)
- Nazar Hussain
- Natural Product Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
| | - Monika Bhardwaj
- Natural Product Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India
| | - Ajaz Ahmed
- Natural Product Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
| | - Debaraj Mukherjee
- Natural Product Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
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