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Arrieta-Rodríguez L, Espinoza-Rosales D, Vera G, Cho YH, Cabezas D, Vásquez-Velásquez D, Mella-Raipán J, Lagos CF, Recabarren-Gajardo G. Novel N-Arylsulfonylindoles Targeted as Ligands of the 5-HT 6 Receptor. Insights on the Influence of C-5 Substitution on Ligand Affinity. Pharmaceuticals (Basel) 2021; 14:ph14060528. [PMID: 34206083 PMCID: PMC8227400 DOI: 10.3390/ph14060528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 11/18/2022] Open
Abstract
A new series of twenty-two C-5 substituted N-arylsulfonylindoles was prepared with the aim of exploring the influence of C-5 substitution on 5-HT6 receptor affinity. Eleven compounds showed moderate to high affinity at the receptor (Ki = 58–403 nM), with compound 4d being identified as the most potent ligand. However, regarding C-5 substitution, both methoxy and fluorine were detrimental for receptor affinity compared to our previously published unsubstituted compounds. In order to shed light on these observations, we performed docking and molecular dynamics simulations with the most potent compounds of each series (4d and 4l) and PUC-10, a highly active ligand previously reported by our group. The comparison brings about deeper insight about the influence of the C-5 substitution on the binding mode of the ligands, suggesting that these replacements are detrimental to the affinity due to precluding a ligand from reaching deeper inside the binding site. Additionally, CoMFA/CoMSIA studies were performed to systematize the information of the main structural and physicochemical characteristics of the ligands, which are responsible for their biological activity. The CoMFA and CoMSIA models presented high values of q2 (0.653; 0.692) and r2 (0.879; 0.970), respectively. Although the biological activity of the ligands can be explained in terms of the steric and electronic properties, it depends mainly on the electronic nature.
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Affiliation(s)
- Loreto Arrieta-Rodríguez
- Bioactive Heterocycles Synthesis Laboratory (BHSL), Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (L.A.-R.); (D.E.-R.); (G.V.); (Y.H.C.)
| | - Daniela Espinoza-Rosales
- Bioactive Heterocycles Synthesis Laboratory (BHSL), Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (L.A.-R.); (D.E.-R.); (G.V.); (Y.H.C.)
| | - Gonzalo Vera
- Bioactive Heterocycles Synthesis Laboratory (BHSL), Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (L.A.-R.); (D.E.-R.); (G.V.); (Y.H.C.)
| | - Young Hwa Cho
- Bioactive Heterocycles Synthesis Laboratory (BHSL), Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (L.A.-R.); (D.E.-R.); (G.V.); (Y.H.C.)
| | - David Cabezas
- Instituto de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso 2360102, Chile; (D.C.); (J.M.-R.)
- Centro de Investigación Farmacopea Chilena (CIFAR), Universidad de Valparaíso, Santa Marta 183, Valparaíso 2360134, Chile
| | - David Vásquez-Velásquez
- Drug Development Laboratory, Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Sergio Livingstone 1007, Santiago 8380492, Chile;
| | - Jaime Mella-Raipán
- Instituto de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso 2360102, Chile; (D.C.); (J.M.-R.)
- Centro de Investigación Farmacopea Chilena (CIFAR), Universidad de Valparaíso, Santa Marta 183, Valparaíso 2360134, Chile
| | - Carlos F. Lagos
- Chemical Biology & Drug Discovery Lab, Escuela de Química y Farmacia, Facultad de Medicina y Ciencia, Universidad San Sebastián, Lota 2465, Providencia, Santiago 7510157, Chile;
| | - Gonzalo Recabarren-Gajardo
- Bioactive Heterocycles Synthesis Laboratory (BHSL), Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (L.A.-R.); (D.E.-R.); (G.V.); (Y.H.C.)
- Centro Interdisciplinario de Neurociencias, Pontificia Universidad Católica de Chile, Marcoleta 391, Santiago 8330024, Chile
- Correspondence: ; Tel.: +56-2-23541418
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Takahashi H, Araki K, Tabata H, Makino K, Ujiie R, Sezaki K, Nakayama H, Oshitari T, Natsugari H. Elucidation of The Conformational Properties of 3-Pyridinoyl Indoles as Intermediates of Cannabimimetics. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Takahashi H, Araki K, Makino K, Tabata H, Nakayama H, Zaitsu K, Oshitari T, Natsugari H. Synthesis of 3-Aroylindoles as Intermediates of Cannabimimetics and Elucidation of Their Physicochemical Properties. HETEROCYCLES 2018. [DOI: 10.3987/com-18-13888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Extended N-Arylsulfonylindoles as 5-HT₆ Receptor Antagonists: Design, Synthesis & Biological Evaluation. Molecules 2016; 21:molecules21081070. [PMID: 27537868 PMCID: PMC6273627 DOI: 10.3390/molecules21081070] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 08/06/2016] [Accepted: 08/08/2016] [Indexed: 01/16/2023] Open
Abstract
Based on a known pharmacophore model for 5-HT6 receptor antagonists, a series of novel extended derivatives of the N-arylsulfonyindole scaffold were designed and identified as a new class of 5-HT6 receptor modulators. Eight of the compounds exhibited moderate to high binding affinities and displayed antagonist profile in 5-HT6 receptor functional assays. Compounds 2-(4-(2-methoxyphenyl)piperazin-1-yl)-1-(1-tosyl-1H-indol-3-yl)ethanol (4b), 1-(1-(4-iodophenylsulfonyl)-1H-indol-3-yl)-2-(4-(2-methoxyphenyl)piperazin-1-yl)ethanol (4g) and 2-(4-(2-methoxyphenyl)piperazin-1-yl)-1-(1-(naphthalen-1-ylsulfonyl)-1H-indol-3-yl)ethanol (4j) showed the best binding affinity (4b pKi = 7.87; 4g pKi = 7.73; 4j pKi = 7.83). Additionally, compound 4j was identified as a highly potent antagonist (IC50 = 32 nM) in calcium mobilisation functional assay.
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Synthesis and characterization of Trichloroisocyanouric acid functionalized mesoporous silica nanocomposite (SBA/TCCA) for the Acylation of Indole. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1131-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Johansson H, Urruticoechea A, Larsen I, Sejer Pedersen D. A Scalable Method for Regioselective 3-Acylation of 2-Substituted Indoles under Basic Conditions. J Org Chem 2014; 80:471-81. [DOI: 10.1021/jo502463d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Henrik Johansson
- Department of Drug Design
and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Andoni Urruticoechea
- Department of Drug Design
and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Inna Larsen
- Department of Drug Design
and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Daniel Sejer Pedersen
- Department of Drug Design
and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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Sitnikov NS, Kokisheva AS, Fukin GK, Neudörfl JM, Sutorius H, Prokop A, Fokin VV, Schmalz HG, Fedorov AY. Synthesis of Indole-Derived Allocolchicine Congeners through Pd-Catalyzed Intramolecular C-H Arylation Reaction. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402850] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Wang C, Wang S, Li H, Yan J, Chi H, Chen X, Zhang Z. Copper-catalyzed decarboxylative C3-acylation of free (N–H) indoles with α-oxocarboxylic acids. Org Biomol Chem 2014; 12:1721-4. [DOI: 10.1039/c3ob42171f] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhao DG, Chen J, Du YR, Ma YY, Chen YX, Gao K, Hu BR. Synthesis and Structure–Activity Relationships of N-Methyl-5,6,7-trimethoxylindoles as Novel Antimitotic and Vascular Disrupting Agents. J Med Chem 2013; 56:1467-77. [DOI: 10.1021/jm3014663] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Deng-Gao Zhao
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering,
Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - JianJun Chen
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering,
Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ya-Rong Du
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering,
Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yan-Yan Ma
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering,
Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ya-Xiong Chen
- Key Laboratory of Heavy Ion
Radiation Biology and Medicine, Institute of Modern Physics, Chinese
Academy of Sciences, Lanzhou 730000, People’s Republic of China
| | - Kun Gao
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering,
Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bu-Rong Hu
- Key Laboratory of Heavy Ion
Radiation Biology and Medicine, Institute of Modern Physics, Chinese
Academy of Sciences, Lanzhou 730000, People’s Republic of China
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Ma Y, You J, Song F. Facile access to 3-acylindoles through palladium-catalyzed addition of indoles to nitriles: the one-pot synthesis of indenoindolones. Chemistry 2012; 19:1189-93. [PMID: 23238950 DOI: 10.1002/chem.201203354] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/14/2012] [Indexed: 12/26/2022]
Affiliation(s)
- Yuanhong Ma
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, West China Medical School, Sichuan University, 29 Wangjiang Road, Chengdu 610064, PR China
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Bai G, Li T, Yang Y, Zhang H, Lan X, Li F, Han J, Ma Z, Chen Q, Chen G. Microwave-assisted Friedel–Crafts acylation of indole with acetic anhydride over tungstophosphoric acid modified Hβ zeolite. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2012.09.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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12
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Zhang LR, Yi FP, Zou JZ, Zhang X, Wang Z. Regioselective Friedel–Crafts Acylation of Indoles Catalysed by Zinc Oxide in an Ionic Liquid. JOURNAL OF CHEMICAL RESEARCH 2012. [DOI: 10.3184/174751912x13460004925054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A facile method for the regioselective Friedel–Crafts acylation of indoles with acyl chlorides catalysed by zinc oxide in an ionic liquid medium has been developed. The corresponding 3-acylindoles were obtained in good to high yields under mild reaction conditions. Zinc oxide, which is easily available and requires no special handling procedures, is an efficient catalyst for acylation of indoles.
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Affiliation(s)
- Li-Rong Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Feng-Ping Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Jian-Zhong Zou
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Xuan Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Zhen Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
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13
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Guchhait SK, Kashyap M, Kamble H. ZrCl4-Mediated Regio- and Chemoselective Friedel–Crafts Acylation of Indole. J Org Chem 2011; 76:4753-8. [DOI: 10.1021/jo200561f] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sankar K. Guchhait
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), S. A. S. Nagar (Mohali) - 160062, Punjab, India
| | - Maneesh Kashyap
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), S. A. S. Nagar (Mohali) - 160062, Punjab, India
| | - Harshad Kamble
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), S. A. S. Nagar (Mohali) - 160062, Punjab, India
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Noland WE, Etienne CL, Lanzatella NP. Synthesis of vinylindoles and vinylpyrroles by the Peterson olefination or by use of the Nysted reagent. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.313] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Erdik E, Pekel ÖÖ. Reactivities of mixed organozinc and mixed organocopper reagents, 2. Selective n-alkyl transfer in tri-n-butylphosphine-catalyzed acylation of n-alkyl phenylzincs; an atom economic synthesis of n-alkyl aryl ketones. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Ty N, Dupeyre G, Chabot GG, Seguin J, Tillequin F, Scherman D, Michel S, Cachet X. Synthesis and biological evaluation of new disubstituted analogues of 6-methoxy-3-(3′,4′,5′-trimethoxybenzoyl)-1H-indole (BPR0L075), as potential antivascular agents. Bioorg Med Chem 2008; 16:7494-503. [DOI: 10.1016/j.bmc.2008.06.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/29/2008] [Accepted: 06/04/2008] [Indexed: 11/30/2022]
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17
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Yin Y, Ma W, Chai Z, Zhao G. Et2Zn-catalyzed intramolecular hydroamination of alkynyl sulfonamides and the related tandem cyclization/addition reaction. J Org Chem 2007; 72:5731-6. [PMID: 17580904 DOI: 10.1021/jo070681h] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular hydroamination of alkynyl amides was effected by a catalytic amount of Et2Zn (20 mol %) to form indole derivatives, and a tandem cyclization/nucleophilic addition procedure involving reaction of the indole zinc salt intermediate with acid chlorides or halides was developed to provide an efficient approach to C3-substituted indole derivatives when an excess of Et2Zn (120 mol %) was used.
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Affiliation(s)
- Yan Yin
- Laboratory of Modern Synthetic Organic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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Arcadi A, Cacchi S, Fabrizi G, Marinelli F, Parisi LM. Palladium-Catalyzed Reaction of o-Alkynyltrifluoroacetanilides with 1-Bromoalkynes. An Approach to 2-Substituted 3-Alkynylindoles and 2-Substituted 3-Acylindoles. J Org Chem 2005; 70:6213-7. [PMID: 16050679 DOI: 10.1021/jo050517z] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The palladium-catalyzed reaction of o-alkynyltrifluoroacetanilides with 1-bromoalkynes affords free N-H 2-substituted 3-alkynylindoles in satisfactory to high yield. 2-Substituted 3-alkynylindoles revealed useful intermediates for the regioselective synthesis of 2-substituted 3-acylindoles. The latter can be prepared from o-alkynyltrifluoroacetanilides and 1-bromoalkynes via a one-pot cyclization-hydration protocol, omitting the isolation of 2-substituted 3-alkynylindoles.
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Affiliation(s)
- Antonio Arcadi
- Dipartimento di Chimica Ingegneria Chimica e Materiali della Facoltà di Scienze, Università di L'Aquila, Via Vetoio, Coppito Due, I-67100 L'Aquila, Italy
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Harada H, Fujii A, Odai O, Kato S. Process Development of a Scaleable Route to (2R)-[3-(2-Aminopropyl)-1H-indol-7-yloxy]-N,N-diethylacetamide: A Key Intermediate for AJ-9677, a Potent and Selective Human and Rat β3-Adrenergic Receptor Agonist. Org Process Res Dev 2004. [DOI: 10.1021/op0341869] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroshi Harada
- Chemistry Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Enoki 33-94, Suita, Osaka 564-0053, Japan
| | - Akihito Fujii
- Chemistry Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Enoki 33-94, Suita, Osaka 564-0053, Japan
| | - Osamu Odai
- Chemistry Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Enoki 33-94, Suita, Osaka 564-0053, Japan
| | - Shiro Kato
- Chemistry Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Enoki 33-94, Suita, Osaka 564-0053, Japan
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Katritzky AR, Suzuki K, Singh SK, He HY. Regiospecific C-acylation of pyrroles and indoles using N-acylbenzotriazoles. J Org Chem 2003; 68:5720-3. [PMID: 12839468 DOI: 10.1021/jo034187z] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of pyrrole (2) or 1-methylpyrrole (4) with readily available N-acylbenzotriazoles 1a-g (RCOBt, where R = 4-tolyl, 4-nitrophenyl, 4-diethylaminophenyl, 2-furyl, 2-pyridyl, 2-indolyl, or 2-pyrrolyl) in the presence of TiCl(4) produced 2-acylpyrroles 3a-g and 5a-g in good to excellent yields. 1-Triisopropylsilylpyrrole (6) under the same conditions gave the respective 3-acylpyrroles 7a-g. Similarly, indole (9) and 1-methylindole (11) gave the corresponding 3-acylated derivatives 10a-g and 12a-g. These results demonstrate that N-acylbenzotriazoles such as 1c,f,g are mild, regioselective, and regiospecific C-acylating agents of particular utility when the corresponding acid chlorides are not readily available.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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22
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Ottoni O, Neder ADVF, Dias AKB, Cruz RPA, Aquino LB. Acylation of Indole under Friedel−Crafts ConditionsAn Improved Method To Obtain 3-Acylindoles Regioselectively. Org Lett 2001. [DOI: 10.1021/ol007056i] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olívia Ottoni
- Instituto de Química, Universidade de Brasília, C. P. 04478, CEP 70910-970, Brasília-DF, Brasil
| | - Amarílis de V. F. Neder
- Instituto de Química, Universidade de Brasília, C. P. 04478, CEP 70910-970, Brasília-DF, Brasil
| | - Ana K. B. Dias
- Instituto de Química, Universidade de Brasília, C. P. 04478, CEP 70910-970, Brasília-DF, Brasil
| | - Rosimeire P. A. Cruz
- Instituto de Química, Universidade de Brasília, C. P. 04478, CEP 70910-970, Brasília-DF, Brasil
| | - Lígia B. Aquino
- Instituto de Química, Universidade de Brasília, C. P. 04478, CEP 70910-970, Brasília-DF, Brasil
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Okauchi T, Itonaga M, Minami T, Owa T, Kitoh K, Yoshino H. A general method for acylation of indoles at the 3-position with acyl chlorides in the presence of dialkylaluminum chloride. Org Lett 2000; 2:1485-7. [PMID: 10814479 DOI: 10.1021/ol005841p] [Citation(s) in RCA: 138] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction--see text] Indoles are selectively acylated at the 3-position in high yields on treatment with a wide variety of acyl chlorides in CH(2)Cl(2) in the presence of diethylaluminum chloride or dimethylaluminum chloride. The reaction proceeds under mild conditions and is applicable to indoles bearing various functional groups without NH protection.
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Affiliation(s)
- T Okauchi
- Department of Applied Chemistry, Kyushu Institute of Technology, 1-1, Sensuicho, Tobata, Kitakyushu, 804-8550, Japan.
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Dieter R. Reaction of acyl chlorides with organometallic reagents: A banquet table of metals for ketone synthesis. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00184-2] [Citation(s) in RCA: 288] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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