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Joarder DD, Gayen S, Sarkar R, Bhattacharya R, Roy S, Maiti DK. (Ar-tpy)Ru II(ACN) 3: A Water-Soluble Catalyst for Aldehyde Amidation, Olefin Oxo-Scissoring, and Alkyne Oxygenation. J Org Chem 2019; 84:8468-8480. [PMID: 31244154 DOI: 10.1021/acs.joc.9b00487] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The synthetic chemists always look for developing new catalysts, sustainable catalysis, and their applications in various organic transformations. Herein, we report a new class of water-soluble complexes, (Ar-tpy)RuII(ACN)3, utilizing designed terpyridines possessing electron-donating and -withdrawing aromatic residues for tuning the catalytic activity of the Ru(II) complex. These complexes displayed excellent catalytic activity for several oxidative organic transformations including late-stage C-H functionalization of aldehydes with NH2OR to valuable primary amides in nonconventional aqueous media with excellent yield. Its diverse catalytic power was established for direct oxo-scissoring of a wide range of alkenes to furnish aldehydes and/or ketones in high yield using a low catalyst loading in the water. Its smart catalytic activity under mild conditions was validated for dioxygenation of alkynes to highly demanding labile synthons, 1,2-diketones, and/or acids. This general and sustainable catalysis was successfully employed on sugar-based substrates to obtain the chiral amides, aldehydes, and labile 1,2-diketones. The catalyst is recovered and reused with a moderate turnover. The proposed mechanistic pathway is supported by isolation of the intermediates and their characterization. This multifaceted sustainable catalysis is a unique tool, especially for late-stage functionalization, to furnish the targeted compounds through frequently used amidation and oxygenation processes in the academia and industry.
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Affiliation(s)
- Dripta De Joarder
- Department of Chemistry , University of Calcutta , 92 A. P. C. Road , Kolkata 700009 , India
| | - Subrata Gayen
- Department of Chemistry , University of Calcutta , 92 A. P. C. Road , Kolkata 700009 , India
| | - Rajarshi Sarkar
- School of Technology Management & Engineering , NMIMS , Indore 453112 , India
| | - Rajarshi Bhattacharya
- Department of Chemistry , University of Calcutta , 92 A. P. C. Road , Kolkata 700009 , India
| | | | - Dilip K Maiti
- Department of Chemistry , University of Calcutta , 92 A. P. C. Road , Kolkata 700009 , India
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Sączewski J, Hudson A, Scheinin M, Wasilewska A, Sączewski F, Rybczyńska A, Ferdousi M, Laurila JM, Boblewski K, Lehmann A, Watts H, Ma D. Transfer of SAR information from hypotensive indazole to indole derivatives acting at α-adrenergic receptors: In vitro and in vivo studies. Eur J Med Chem 2016; 115:406-15. [PMID: 27031216 DOI: 10.1016/j.ejmech.2016.03.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 03/09/2016] [Accepted: 03/10/2016] [Indexed: 12/24/2022]
Abstract
In a search for novel antihypertensive drugs we applied scaffold hopping from the previously described α1-adrenergic receptor antagonists, 1-[(imidazolin-2-yl)methyl]indazoles. The aim was to investigate whether the α-adrenergic properties of the indazole core were transferable to the indole core. The newly obtained 1-[(imidazolin-2-yl)methyl]indole analogues were screened in vitro for their binding affinities for α1-and α2-adrenoceptors, which allowed the identification of the target-based SAR transfer (T_SAR transfer) as well as structure-based SAR transfer (S_SAR transfer) events. However, when screened in vivo with use of anaesthetized male Wistar rats, the new indole ligands showed a different hemodynamic profile than expected. Instead of the immediate hypotensive effect characteristic of peripheral vasodilatator α1 blockers, a biphasic effect was observed, reminiscent of clonidine-like centrally acting antihypertensive agents. This was supported by subsequent in vitro functional studies in [(35)S]GTPγS binding assay, where the indole analogues displayed partial agonist properties at α2-adrenergic receptors. Since no correlation was found between the in vitro binding to α-adrenoceptors and the in vivo hemodynamic effects of the two series of indazole and indole bioisosteric compounds, in a search for new imidazoline-containing adrenergic drugs, the structure-based SAR transfer information obtained from in vitro binding studies should be treated with caution.
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Affiliation(s)
- Jaroslaw Sączewski
- Department of Organic Chemistry, Medical University of Gdańsk, 80-416, Gdańsk, Poland.
| | - Alan Hudson
- Department of Pharmacology, 9-47 Medical Sciences Building, University of Alberta, Edmonton, T6G 2H7, Canada
| | - Mika Scheinin
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, and Turku University Hospital, FI-20014 Turku, Finland
| | - Aleksandra Wasilewska
- Department of Chemical Technology of Drugs, Medical University of Gdańsk, 80-416, Gdańsk, Poland
| | - Franciszek Sączewski
- Department of Chemical Technology of Drugs, Medical University of Gdańsk, 80-416, Gdańsk, Poland
| | | | - Mehnaz Ferdousi
- Department of Pharmacology, 9-47 Medical Sciences Building, University of Alberta, Edmonton, T6G 2H7, Canada
| | - Jonne M Laurila
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, and Turku University Hospital, FI-20014 Turku, Finland
| | - Konrad Boblewski
- Department of Pathophysiology, Medical University of Gdansk, Poland
| | - Artur Lehmann
- Department of Pathophysiology, Medical University of Gdansk, Poland
| | - Helena Watts
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - Daqing Ma
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Imperial College London, Chelsea and Westminster Hospital, London, UK
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Synthesis and biological activities of 2-[(heteroaryl)methyl]imidazolines. Bioorg Med Chem 2012; 20:108-16. [DOI: 10.1016/j.bmc.2011.11.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 11/12/2011] [Accepted: 11/14/2011] [Indexed: 10/15/2022]
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Patonay T, Kónya K, Juhász-Tóth É. Syntheses and transformations of α-azido ketones and related derivatives. Chem Soc Rev 2011; 40:2797-847. [DOI: 10.1039/c0cs00101e] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Novel 2-imidazoles as potent and selective α1A adrenoceptor partial agonists. Bioorg Med Chem Lett 2008; 18:2930-4. [DOI: 10.1016/j.bmcl.2008.03.070] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2008] [Revised: 03/25/2008] [Accepted: 03/25/2008] [Indexed: 11/18/2022]
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6
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Touzeau F, Arrault A, Guillaumet G, Scalbert E, Pfeiffer B, Rettori MC, Renard P, Mérour JY. Synthesis and biological evaluation of new 2-(4,5-dihydro-1H-imidazol-2-yl)-3,4-dihydro-2H-1,4-benzoxazine derivatives. J Med Chem 2003; 46:1962-79. [PMID: 12723959 DOI: 10.1021/jm021050c] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
2-(4,5-Dihydro-1H-imidazol-2-yl)-3,4-dihydro-2H-1,4-benzoxazine derivatives and tricyclic analogues with a fused additional ring on the nitrogen atom of the benzoxazine moiety have been prepared and evaluated for their cardiovascular effects as potential antihypertensive agents. The imidazoline ring was generated by reaction of the corresponding ethyl ester with ethylenediamine. Affinities for imidazoline binding sites (IBS) I(1) and I(2) and alpha(1) and alpha(2) adrenergic receptors were evaluated as well as the effects on mean arterial blood pressure (MAP) and heart rate (HR) of spontaneously hypertensive rats. With few exceptions the most active compounds on MAP were those with high affinities for IBS and alpha(2) receptor. Among these, compound 4h was the most interesting and is now, together with its enantiomers, under complementary pharmacological evaluation.
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MESH Headings
- Adrenal Medulla/metabolism
- Animals
- Antihypertensive Agents/chemical synthesis
- Antihypertensive Agents/chemistry
- Antihypertensive Agents/pharmacology
- Binding Sites
- Blood Pressure/drug effects
- Cattle
- Frontal Lobe/drug effects
- Frontal Lobe/metabolism
- Heart Rate/drug effects
- Imidazoles/chemical synthesis
- Imidazoles/chemistry
- Imidazoles/pharmacology
- Imidazoline Receptors
- In Vitro Techniques
- Kidney/drug effects
- Kidney/metabolism
- Oxazines/chemical synthesis
- Oxazines/chemistry
- Oxazines/pharmacology
- Rabbits
- Radioligand Assay
- Rats
- Rats, Inbred SHR
- Rats, Wistar
- Receptors, Adrenergic, alpha-1/drug effects
- Receptors, Adrenergic, alpha-1/metabolism
- Receptors, Adrenergic, alpha-2/drug effects
- Receptors, Adrenergic, alpha-2/metabolism
- Receptors, Drug/drug effects
- Receptors, Drug/metabolism
- Stereoisomerism
- Structure-Activity Relationship
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Affiliation(s)
- Frédérique Touzeau
- Institut de Chimie Organique et Analytique, UMR-CNRS 6005, BP 6759, Université d'Orléans, 45067 Orléans Cedex 2, France
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Speake JD, Navas F, Bishop MJ, Garrison DT, Bigham EC, Hodson SJ, Saussy DL, Liacos JA, Irving PE, Sherman BW. 2-(Anilinomethyl)imidazolines as alpha1 adrenergic receptor agonists: alpha1a subtype selective 2'-heteroaryl compounds. Bioorg Med Chem Lett 2003; 13:1183-6. [PMID: 12643939 DOI: 10.1016/s0960-894x(03)00050-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The structure-activity relationship of 2'-pyrrole, pyrazole and triazole substituted 2-(anilinomethyl)imidazolines as alpha(1) adrenergic agonists was investigated. The size and orientation of substituents, as well as the position of the heteroatoms, were found to have a profound effect on the potency and selectivity of the molecules. Potent alpha(1A) subtype selective agonists have been identified.
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Affiliation(s)
- Jason D Speake
- GlaxoSmithKline, 5Moore Drive, Research Triangle Park, NC 27709, USA.
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Hodson SJ, Bigham EC, Garrison DT, Gobel MJ, Irving PE, Liacos JA, Navas F, Saussy DL, Sherman BW, Speake JD, Bishop MJ. Alpha(1)-adrenoceptor activation: a comparison of 4-(anilinomethyl)imidazoles and 4-(phenoxymethyl)imidazoles to related 2-imidazolines. Bioorg Med Chem Lett 2002; 12:3449-52. [PMID: 12419381 DOI: 10.1016/s0960-894x(02)00753-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Literature reports suggest that disruption of an interhelical salt bridge is critical for alpha(1)-adrenoceptor activation, and the basic amine found in adrenergic receptor ligands is responsible for the disruption. Novel 4-(anilinomethyl)imidazoles and 4-(phenoxymethyl)imidazoles are agonists of the cloned human alpha(1)-adrenoceptors in vitro, and potent, selective alpha(1A)-adrenoceptor agonists have been identified in this series. These imidazoles demonstrate similar potencies and alpha(1)-subtype selectivities as the corresponding 2-substituted imidazolines. The extremely close SAR suggests that, in spite of the large difference in basicity, these imidazoles and imidazolines may establish the same interactions to activate alpha(1)-adrenoceptors.
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Affiliation(s)
- Stephen J Hodson
- GlaxoSmithKline Research and Development, Research Triangle Park, NC 27709, USA
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