1
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Shu S, Yu M, Yu W, Wang T, Zhang Z. Selective N-functionalization of Arylhydrazines with Primary Alcohols and Acids under PPh 3/DDQ System. J Org Chem 2024. [PMID: 38946235 DOI: 10.1021/acs.joc.4c00915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
We present a PPh3/DDQ-mediated regiospecific selective N-functionalization of arylhydrazines with primary benzylic alcohols and aryl carboxylic acids for the synthesis of N1-benzyl arylhydrazines and N2-acyl arylhydrazines, respectively. This metal- and base-free approach features very short reaction times (about 10 min), broad substrate scope, good functional group tolerance, and mild reaction conditions. Furthermore, N1-benzlated products have also been successfully applied to the concise synthesis of N-substituted indoles and anticancer drug MDM2 inhibitor.
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Affiliation(s)
- Shubing Shu
- Jiangxi Province Key Laboratory of Natural and Biomimetic Drugs Research, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, PR China
| | - Meng Yu
- Jiangxi Province Key Laboratory of Natural and Biomimetic Drugs Research, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, PR China
| | - Wenxin Yu
- Jiangxi Province Key Laboratory of Natural and Biomimetic Drugs Research, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, PR China
| | - Tao Wang
- Jiangxi Province Key Laboratory of Natural and Biomimetic Drugs Research, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, PR China
| | - Zhenming Zhang
- Jiangxi Province Key Laboratory of Natural and Biomimetic Drugs Research, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, PR China
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2
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Yu Y, Li F, Li J, Zheng X, Tian H, Mahmut Z, Du Y, Dai Y, Wang L. Lipase-catalyzed hydrazine insertion for the synthesis of N'-alkyl benzohydrazides. Biotechnol Appl Biochem 2023; 70:130-136. [PMID: 35285069 DOI: 10.1002/bab.2335] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 02/22/2022] [Indexed: 11/07/2022]
Abstract
N'-alkyl benzohydrazides are classic organic compounds that have been widely utilized in organic chemistry. In this study, an efficient method was developed for the synthesis of N'-alkyl benzohydrazides by hydrazine insertion catalyzed by lipase. Under the optimal conditions (Morita-Baylis-Hillman ketone [1 mmol], phenylhydrazine [1.3 mmol], N,N-dimethylformamide [2 ml], lipase [20 mg], room temperature, 12 h), satisfactory yields (71-97%) and substrate tolerance were obtained when porcine pancreatic lipase was used as biocatalyst. These findings imply the great potential for the lipase-catalyzed synthesis of N'-alkyl benzohydrazides and extend the utilization of lipase in organic chemistry.
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Affiliation(s)
- Yue Yu
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Fengxi Li
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Jiapeng Li
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Xin Zheng
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Haochen Tian
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Zulpiya Mahmut
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Yanan Du
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Yuyin Dai
- Department of Nuclear Medicine, the First Hospital of Jilin University, Changchun, China
| | - Lei Wang
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
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3
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Saxena P, Myles RC, Smith GL, Workman AJ. Adrenoceptor sub-type involvement in Ca 2+ current stimulation by noradrenaline in human and rabbit atrial myocytes. Pflugers Arch 2022; 474:1311-1321. [PMID: 36131146 DOI: 10.1007/s00424-022-02746-z] [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: 05/23/2022] [Revised: 08/17/2022] [Accepted: 09/02/2022] [Indexed: 10/14/2022]
Abstract
Atrial fibrillation (AF) from elevated adrenergic activity may involve increased atrial L-type Ca2+ current (ICaL) by noradrenaline (NA). However, the contribution of the adrenoceptor (AR) sub-types to such ICaL-increase is poorly understood, particularly in human. We therefore investigated effects of various broad-action and sub-type-specific α- and β-AR antagonists on NA-stimulated atrial ICaL. ICaL was recorded by whole-cell-patch clamp at 37 °C in myocytes isolated enzymatically from atrial tissues from consenting patients undergoing elective cardiac surgery and from rabbits. NA markedly increased human atrial ICaL, maximally by ~ 2.5-fold, with EC75 310 nM. Propranolol (β1 + β2-AR antagonist, 0.2 microM) substantially decreased NA (310 nM)-stimulated ICaL, in human and rabbit. Phentolamine (α1 + α2-AR antagonist, 1 microM) also decreased NA-stimulated ICaL. CGP20712A (β1-AR antagonist, 0.3 microM) and prazosin (α1-AR antagonist, 0.5 microM) each decreased NA-stimulated ICaL in both species. ICI118551 (β2-AR antagonist, 0.1 microM), in the presence of NA + CGP20712A, had no significant effect on ICaL in human atrial myocytes, but increased it in rabbit. Yohimbine (α2-AR antagonist, 10 microM), with NA + prazosin, had no significant effect on human or rabbit ICaL. Stimulation of atrial ICaL by NA is mediated, based on AR sub-type antagonist responses, mainly by activating β1- and α1-ARs in both human and rabbit, with a β2-inhibitory contribution evident in rabbit, and negligible α2 involvement in either species. This improved understanding of AR sub-type contributions to noradrenergic activation of atrial ICaL could help inform future potential optimisation of pharmacological AR-antagonism strategies for inhibiting adrenergic AF.
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Affiliation(s)
- Priyanka Saxena
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK
| | - Rachel C Myles
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK
| | - Godfrey L Smith
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK
| | - Antony J Workman
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK.
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4
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Yu F, Darcel C, Fischmeister C. Single-Step Sustainable Production of Hydroxy-Functionalized 2-Imidazolines from Carbohydrates. CHEMSUSCHEM 2022; 15:e202102361. [PMID: 34905289 DOI: 10.1002/cssc.202102361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Manufacturing valuable N-containing chemicals from biomass is highly desirable yet challenging. Herein, a novel strategy was developed for efficient production of 2-(1-hydroxyethyl)-imidazoline (HI), a high-value and versatile building block for synthesizing a myriad of bioactive targets, directly from carbohydrates under mild reaction conditions. With this strategy, bio-based HI was produced from fructose in one step with as high as 77 C % isolated yield in the presence of ethylenediamine (EDA) and InCl3 at 130 °C. The synergistic functions of EDA and InCl3 were identified for the transformation, wherein EDA promoted the scission of C-C bond of fructose backbone via retro-aldol (R-A) reaction and rapidly trapped in-situ formed reactive carbonyl-containing C3 intermediate for HI formation to avoid undesired side reaction, and InCl3 facilitated the formation of this C3 intermediate and the final 1,2-hydrid shift step.
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Affiliation(s)
- Feng Yu
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), Univ. Rennes UMR 6226, 35000, Rennes, France
- Present address: Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | - Christophe Darcel
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), Univ. Rennes UMR 6226, 35000, Rennes, France
| | - Cédric Fischmeister
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), Univ. Rennes UMR 6226, 35000, Rennes, France
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5
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Sneddon DS, Hoye TR. Arylhydrazine Trapping of Benzynes: Mechanistic Insights and a Route to Azoarenes. Org Lett 2021; 23:3432-3436. [PMID: 33872032 DOI: 10.1021/acs.orglett.1c00897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Arylhydrazines (ArNαHNβH2) are ambident nucleophiles. We describe here their reactivity with benzynes generated in situ by thermal cyclization of several multiynes. Products arising from attack of both the alpha- and beta-nitrogen atoms are observed. These competitive modes of reaction were explored by DFT calculations. Substituent effects on the site-selectivity for several substituted phenylhydrazines were explored. Interestingly, the hydrazo products from beta-attack (ArNHNHAr') can be oxidized, sometimes in situ by oxygen alone, to give structurally complex, unsymmetrical azoarenes (ArN═NAr'). Toluenesulfonohydrazide and benzohydrazide analogues were each demonstrated to undergo similar transformations, including oxidation to the corresponding benzyne-trapped azo compounds.
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Affiliation(s)
- Dorian S Sneddon
- Department of Chemistry, University of Minnesota, 207 Pleasant Street, Southeast, Minneapolis, Minnesota 55455 United States
| | - Thomas R Hoye
- Department of Chemistry, University of Minnesota, 207 Pleasant Street, Southeast, Minneapolis, Minnesota 55455 United States
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Aneeja T, Radhika S, Neetha M, Anilkumar G. An Overview of the One-pot Synthesis of Imidazolines. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201001153735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
One-pot syntheses are a simple, efficient and easy methodology, which are widely
used for the synthesis of organic compounds. Imidazoline is a valuable heterocyclic moiety
used as a synthetic intermediate, chiral auxiliary, chiral catalyst and a ligand for asymmetric
catalysis. Imidazole is a fundamental unit of biomolecules that can be easily prepared from
imidazolines. The one-pot method is an impressive approach to synthesize organic compounds
as it minimizes the reaction time, separation procedures, and ecological impact. Many significant
one-pot methods such as N-bromosuccinimide mediated reaction, ring-opening of tetrahydrofuran,
triflic anhydrate mediated reaction, etc. were reported for imidazoline synthesis.
This review describes an overview of the one-pot synthesis of imidazolines and covers literature
up to 2020.
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Affiliation(s)
- Thaipparambil Aneeja
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Sankaran Radhika
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Mohan Neetha
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
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7
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Huang Y, Choy PY, Wang J, Tse MK, Sun RWY, Chan ASC, Kwong FY. Palladium-Catalyzed Monoarylation of Arylhydrazines with Aryl Tosylates. J Org Chem 2020; 85:14664-14673. [PMID: 32924493 DOI: 10.1021/acs.joc.0c01599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A palladium-catalyzed C-N bond coupling reaction between arylhydrazines and aryl tosylates for facile synthesis of unsymmetrical N,N-diarylhydrazines has been developed. Employing the catalyst system of Pd(TFA)2 associated with newly developed phosphine ligand L1, the monoarylation of arylhydrazine proceeds smoothly to afford desired products in good-to-excellent yields (up to 95%) with good functional group compatibility. This method provides an alternative synthetic pathway for accessing structurally diversified N,N-diarylhydrazines from simple and easily accessible coupling components.
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Affiliation(s)
- Yange Huang
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China.,State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Shatin, Hong Kong, China
| | - Pui Ying Choy
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China.,State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Shatin, Hong Kong, China
| | - Junya Wang
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China
| | - Man-Kin Tse
- Guangzhou Lee & Man Technology Co. Ltd, Rm 401, Blk A, 8 Huanshi Avenue South, Nansha, Guangzhou, China
| | - Raymond Wai-Yin Sun
- Guangzhou Lee & Man Technology Co. Ltd, Rm 401, Blk A, 8 Huanshi Avenue South, Nansha, Guangzhou, China
| | - Albert Sun-Chi Chan
- Guangzhou Lee & Man Technology Co. Ltd, Rm 401, Blk A, 8 Huanshi Avenue South, Nansha, Guangzhou, China
| | - Fuk Yee Kwong
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China.,State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Shatin, Hong Kong, China
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8
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Çapan İ, Servi S. Synthesis of novel aza-heterocyclic derivatives from diester and diacid chlorides having the dibenzobarrelene skeleton. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2018.1437449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- İrfan Çapan
- Department of Polymer Technology, Technical Sciences Vocational College, Gazi University, Ankara, Turkey
| | - Süleyman Servi
- Department of Chemistry, Faculty of Science, Fırat University, Elazığ, Turkey
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9
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Radioligand binding analysis of α 2 adrenoceptors with [ 11C]yohimbine in brain in vivo: Extended Inhibition Plot correction for plasma protein binding. Sci Rep 2017; 7:15979. [PMID: 29167492 PMCID: PMC5700124 DOI: 10.1038/s41598-017-16020-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 10/23/2017] [Indexed: 11/23/2022] Open
Abstract
We describe a novel method of kinetic analysis of radioligand binding to neuroreceptors in brain in vivo, here applied to noradrenaline receptors in rat brain. The method uses positron emission tomography (PET) of [11C]yohimbine binding in brain to quantify the density and affinity of α2 adrenoceptors under condition of changing radioligand binding to plasma proteins. We obtained dynamic PET recordings from brain of Spraque Dawley rats at baseline, followed by pharmacological challenge with unlabeled yohimbine (0.3 mg/kg). The challenge with unlabeled ligand failed to diminish radioligand accumulation in brain tissue, due to the blocking of radioligand binding to plasma proteins that elevated the free fractions of the radioligand in plasma. We devised a method that graphically resolved the masking of unlabeled ligand binding by the increase of radioligand free fractions in plasma. The Extended Inhibition Plot introduced here yielded an estimate of the volume of distribution of non-displaceable ligand in brain tissue that increased with the increase of the free fraction of the radioligand in plasma. The resulting binding potentials of the radioligand declined by 50–60% in the presence of unlabeled ligand. The kinetic unmasking of inhibited binding reflected in the increase of the reference volume of distribution yielded estimates of receptor saturation consistent with the binding of unlabeled ligand.
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10
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Harris DA, Park JM, Lee KS, Xu C, Stella N, Hague C. Label-Free Dynamic Mass Redistribution Reveals Low-Density, Prosurvival α1B-Adrenergic Receptors in Human SW480 Colon Carcinoma Cells. J Pharmacol Exp Ther 2017; 361:219-228. [PMID: 28196836 DOI: 10.1124/jpet.116.237255] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 02/10/2017] [Indexed: 12/11/2022] Open
Abstract
Small molecules that target the adrenergic family of G protein-coupled receptors (GPCRs) show promising therapeutic efficacy for the treatment of various cancers. In this study, we report that human colon cancer cell line SW480 expresses low-density functional α1B-adrenergic receptors (ARs) as revealed by label-free dynamic mass redistribution (DMR) signaling technology and confirmed by quantitative reverse-transcriptase polymerase chain reaction analysis. Remarkably, although endogenous α1B-ARs are not detectable via either [3H]-prazosin-binding analysis or phosphoinositol hydrolysis assays, their activation leads to robust DMR and enhanced cell viability. We provide pharmacological evidence that stimulation of α1B-ARs enhances SW480 cell viability without affecting proliferation, whereas stimulating β-ARs diminishes both viability and proliferation of SW480 cells. Our study illustrates the power of label-free DMR technology for identifying and characterizing low-density GPCRs in cells and suggests that drugs targeting both α1B- and β-ARs may represent valuable small-molecule therapeutics for the treatment of colon cancer.
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Affiliation(s)
- Dorathy-Ann Harris
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
| | - Ji-Min Park
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
| | - Kyung-Soon Lee
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
| | - Cong Xu
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
| | - Nephi Stella
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
| | - Chris Hague
- Departments of Pharmacology (D.-A.H., J.-M.P., K.-S.L., C.X., N.S., C.H.) and Psychiatry and Behavioral Sciences (C.X., N.S.), University of Washington School of Medicine, Seattle, Washington
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11
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KOt-Bu promoted homocoupling and decomposition of N′-aryl acylhydrazines: synthesis of unsymmetric N′,N′-diaryl acylhydrazines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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12
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Panel docking of small-molecule libraries - Prospects to improve efficiency of lead compound discovery. Biotechnol Adv 2015; 33:941-7. [PMID: 26025037 DOI: 10.1016/j.biotechadv.2015.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 05/19/2015] [Accepted: 05/23/2015] [Indexed: 12/21/2022]
Abstract
Computational docking as a means to prioritise small molecules in drug discovery projects remains a highly popular in silico screening approach. Contemporary docking approaches without experimental parametrisation can reliably differentiate active and inactive chemotypes in a protein binding site, but the absence of a correlation between the score of a predicted binding pose and the biological activity of the molecule presents a clear limitation. Several novel or improved computational approaches have been developed in the recent past to aid in screening and profiling of small-molecule ligands for drug discovery, but also more broadly in developing conceptual relationships between different protein targets by chemical probing. Among those new methodologies is a strategy known as inverse virtual screening, which involves the docking of a compound into different protein structures. In the present article, we review the different computational screening methodologies that employ docking of atomic models, and, by means of a case study, present an approach that expands the inverse virtual screening concept. By computationally screening a reasonably sized library of 1235 compounds against a panel of 48 mostly human kinases, we have been able to identify five groups of putative lead compounds with substantial diversity when compared to each other. One representative of each of the five groups was synthesised, and tested in kinase inhibition assays, yielding two compounds with micro-molar inhibition in five human kinases. This highly economic and cost-effective methodology holds great promise for drug discovery projects, especially in cases where a group of target proteins share high structural similarity in their binding sites.
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13
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Zhang JQ, Huang GB, Weng J, Lu G, Chan ASC. Copper(ii)-catalyzed coupling reaction: an efficient and regioselective approach to N′,N′-diaryl acylhydrazines. Org Biomol Chem 2015; 13:2055-63. [DOI: 10.1039/c4ob02343a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient and regioselective copper(ii)-catalyzed coupling reaction of N′-aryl acylhydrazines for the synthesis of N′,N′-diaryl acylhydrazines has been developed.
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Affiliation(s)
- Ji-Quan Zhang
- Institute of Drug Synthesis and Pharmaceutical Process
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Gong-Bin Huang
- Institute of Drug Synthesis and Pharmaceutical Process
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Jiang Weng
- Institute of Drug Synthesis and Pharmaceutical Process
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Gui Lu
- Institute of Drug Synthesis and Pharmaceutical Process
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Albert S. C. Chan
- Institute of Drug Synthesis and Pharmaceutical Process
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
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14
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Bain CD, Bayne JM, Bohle DS, Butler IS, Poisson J. Synthesis of reduction-sensitive 1,1-diarylhydrazines from 1,1-diarylamines. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
1-(2-Nitrophenyl)-1-phenylamine and methyl 4-((2-nitrophenyl)amino)benzoate have been transformed into their corresponding urea derivatives through the action of chlorosulfonyl isocyanate. The initial sulfimidate product from the former reaction has sufficient stability so that it can be isolated and characterized as its disodium salt, and this, as well as three other subsequent products, have been characterized by X-ray diffraction. The corresponding intermediary urea was converted into its hydrazine derivative via a Hofmann rearrangement under oxidative conditions. Density functional theory has been used to examine the nature of the intermediates and transition states for the Hofmann rearrangement. There is little theoretical indication for a cyclic aziridinonium intermediate and the transition state between the urea and the isocyanate corresponds to a reactant-like rotation of the planar singlet nitrene before migration and formation of the new N−N bond.
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Affiliation(s)
- Cheryl D. Bain
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada
| | - Julia M. Bayne
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada
| | - D. Scott Bohle
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada
| | - Ian S. Butler
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada
| | - Joël Poisson
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada
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15
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Wu W, Li XL, Fan XH, Yang LM. An Easy Route toN,N-Diarylhydrazines by Cu-Catalyzed Arylation of Pyridine-2-carbaldehyde Hydrazones with Aryl Halides. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201445] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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17
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Xiong X, Jiang Y, Ma D. Assembly of N,N-Disubstituted Hydrazines and 1-Aryl-1H-indazoles via Copper-Catalyzed Coupling Reactions. Org Lett 2012; 14:2552-5. [DOI: 10.1021/ol300847v] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaodong Xiong
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Yongwen Jiang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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18
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Abdel-Hamid IA, Andersson KE, Salonia A. Exploration of therapeutic targets for sexual dysfunctions: lessons learned from the failed stories. Expert Opin Ther Targets 2011; 15:325-40. [DOI: 10.1517/14728222.2011.551008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Veisi H, Ghorbani-Vaghei R. Recent progress in the application of N-halo reagents in the synthesis of heterocyclic compounds. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bavadekar SA, Hong SS, Lee SI, Miller DD, Feller DR. Bioisosteric phentolamine analogs as selective human alpha(2)- versus alpha(1)-adrenoceptor ligands. Eur J Pharmacol 2008; 590:53-60. [PMID: 18589415 DOI: 10.1016/j.ejphar.2008.05.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2007] [Revised: 04/29/2008] [Accepted: 05/19/2008] [Indexed: 11/30/2022]
Abstract
Phentolamine is known to act as a competitive, non-subtype-selective alpha-adrenoceptor antagonist. In an attempt to improve alpha(2)- versus alpha(1)-adrenoceptor selectivity and alpha(2)-adrenoceptor subtype-selectivity, two new chemical series of bioisosteric phentolamine analogs were prepared and evaluated. These compounds were evaluated for binding affinities on alpha(1)- (alpha(1A)-, alpha(1B)-, alpha(1D)-) and alpha(2)- (alpha(2A)-, alpha(2B)-, alpha(2C)-) adrenoceptor subtypes that had been stably expressed in human embryonic kidney and Chinese hamster ovary cell lines, respectively. Methylation of the phenolic hydroxy group and replacement of the 4-methyl group of phentolamine with varying lipophilic substituents yielded bioisosteric analogs selective for the alpha(2)- versus alpha(1)-adrenoceptors. Within the alpha(2)-adrenoceptors, these analogs bound with higher affinity at the alpha(2A)- and alpha(2C)-subtypes as compared to the alpha(2B)-subtype. In particular, the t-butyl analog was found to be the most selective, its binding at the alpha(2C)-adrenoceptor (Ki=3.6 nM) being 37- to 173-fold higher than that at the alpha(1)-adrenoceptors, and around 2- and 19-fold higher than at the alpha(2A)- and alpha(2B)-adrenoceptors, respectively. Data from luciferase reporter gene assays confirmed the functional antagonist activities of selected compounds from the bioisosteric series on human alpha(1A)- and alpha(2C)-adrenoceptors. Thus, the results with these bioisosteric analogs of phentolamine provide a lead to the rational design of potent and selective alpha(2)-adrenoceptor ligands that may be useful in improving the therapeutic profile of this drug class for human disorders.
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Affiliation(s)
- Supriya A Bavadekar
- Department of Pharmacology, School of Pharmacy, University of Mississippi, University, MS 38677, United States.
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Zhao M, Li Z, Peng L, Tang YR, Wang C, Zhang Z, Peng S. Novel 1-oxyl-2-substitutedphenyl-4,4,5,5-tetramethylimidazolines: Synthesis, selectively analgesic action, and QSAR analysis. Bioorg Med Chem 2007; 15:2815-26. [PMID: 17336536 DOI: 10.1016/j.bmc.2007.02.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 02/12/2007] [Accepted: 02/13/2007] [Indexed: 11/19/2022]
Abstract
Based on the knowledge that imidazoline can result in analgesic action due to its selective binding with the prostacyclin receptor, 20 1-oxyl-2-substitutedphenyl-4,4,5,5-tetramethylimidazolines (3a-t) were prepared in moderate yields. At 0.13 mmol/kg dose, their in vivo analgesic activities were evaluated after the mice were administered at 30, 60, 90, and 150 min. Compared with the pain threshold (12.27+/-9.56-17.71+/-7.00%) of normal saline (NS) receiving mice, the pain threshold (23.42+/-8.14% to 102.58+/-10.66%) of 3a-t receiving mice increases significantly. Considering a prostacyclin receptor targeting analgesic agent usually had bleeding action and to appraise the bleeding risk, the in vivo tail bleeding time of 1.30 mmol/kg 3a-t receiving mice was found to be ranged from 116.3+/-8.2s to 120.3+/-9.2s, which was substantially equal to that (117.8+/-8.4s to 119.0+/-8.6s) of NS receiving mice. Based on the possibility of imidazoline acting as vasodilator, the in vitro vasorelaxations of 3a-t were tested using the rat aortic strip model. When the aortic strip contracted by noradrenaline (NE, final concentration 10(-7)mol/l) was treated with 3a-t (final concentration 5 x 10(-4)mol/l), only lower percentage inhibitions (6.55+/-5.70-37.40+/-4.07%) were recorded, implying that the vasorelaxation of 3a-t was neglectable. By selecting appropriate molecular descriptors generated from e-dragon server, the QSAR model of the analgesic activities of 3a-t was constructed using the multiple linear regression method. The established QSAR model showed reasonable accuracy and thus it is promising to be used for screening new 1-oxyl-2-substitutedphenyl-4,4,5,5-tetramethylimidazoline derivatives as analgesic agents.
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Affiliation(s)
- Ming Zhao
- College of Pharmaceutical Sciences, Capital Medical University, Beijing 100054, PR China
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