1
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Rezvanian A, Esfandsar Z. Pyrazole-promoted synthesis of pyrrolo[3,4-c] quinoline-1,3-diones in a novel diketene-based reaction. Front Chem 2023; 11:1219986. [PMID: 37822773 PMCID: PMC10562593 DOI: 10.3389/fchem.2023.1219986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 09/08/2023] [Indexed: 10/13/2023] Open
Abstract
We describe the first classic example of green synthesis of pyrrolo[3,4-c]quinolones scaffolds by catalyst-free unusual reaction of diketene, isatin, and primary amines in ethanol in the presence of pyrazole as a promoter for 4 h. The whole structure of the new product was confirmed by X-ray analysis. The overall transformation involves the cleavage and generation of multiple carbon-nitrogen and carbon-carbon bonds. This report represents a simple and straightforward approach for the synthesis of pyrrolo[3,4-c]quinoline-1,3-diones, which has significant advantages like readily available precursors, non-use of toxic solvent, operational simplicity, mild conditions, good atom economy, and excellent yields; therefore it provides a green and sustainable strategy for access to a range of interesting N-containing heterocyclic compounds in medicinal and organic chemistry.
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Affiliation(s)
- Atieh Rezvanian
- Department of Organic Chemistry, Faculty of Chemistry, Alzahra University, Tehran, Iran
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2
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Geng J, Wei X, He B, Hao Y, Qu J, Wang B. Desymmetrization of Prochiral N-Pyrazolyl Maleimides via Organocatalyzed Asymmetric Michael Addition with Pyrazolones: Construction of Tri- N-Heterocyclic Scaffolds Bearing Both Central and Axial Chirality. Molecules 2023; 28:molecules28114279. [PMID: 37298754 DOI: 10.3390/molecules28114279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
The desymmetrization of N-pyrazolyl maleimides was realized through an asymmetric Michael addition by using pyrazolones under mild conditions, leading to the formation of a tri-N-heterocyclic pyrazole-succinimide-pyrazolone assembly in high yields with excellent enantioselectivities (up to 99% yield, up to 99% ee). The use of a quinine-derived thiourea catalyst was essential for achieving stereocontrol of the vicinal quaternary-tertiary stereocenters together with the C-N chiral axis. Salient features of this protocol included a broad substrate scope, atom economy, mild conditions and simple operation. Moreover, a gram-scale experiment and derivatization of the product further illustrated the practicability and potential application value of this methodology.
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Affiliation(s)
- Jianqi Geng
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Xingfu Wei
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Biru He
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Yuting Hao
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
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3
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Lv KH, Chen L, Zhao KH, Yang JM, Yan SJ. Cu-Catalyzed Decarboxylative Annulation of N-Phenylglycines with Maleimides: Synthesis of 1 H-Pyrrolo[3,4- c]quinoline-1,3(2 H)-diones. J Org Chem 2023; 88:2358-2366. [PMID: 36753732 DOI: 10.1021/acs.joc.2c02757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A novel protocol for the construction of functionalized 1H-pyrrolo[3,4-c]quinoline-1,3(2H)-diones (PQLs, 3) from N-phenylglycines and maleimides was developed. The cascade reaction was enabled by heating a mixture of the two substrates in the presence of di-tert-butyl peroxide (DTBP) as an oxidant and anhydrous CuBr as a catalyst in chlorobenzene. Consequently, a diverse series of PQLs 3 were synthesized in moderate-to-good yields (43-73%). The synthesis of the PQLs was enabled via a one-pot cascade reaction that proceeded through subsequent oxidative decarboxylation, 1,2-addition, intramolecular cyclization, tautomerization, and aromatization reactions. This protocol can be used for the synthesis of functionalized PQLs via a one-pot oxidative decarboxylation annulation reaction rather than through a series of multistep reactions, making it suitable for both combinatorial and parallel syntheses of PQLs.
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Affiliation(s)
- Kai-Hong Lv
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P. R. China
| | - Li Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P. R. China
| | - Ke-Hua Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P. R. China
| | - Jia-Ming Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P. R. China
| | - Sheng-Jiao Yan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P. R. China
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4
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Barata‐Vallejo S, Yerien DE, Postigo A. Bioinspired Photocatalyzed Organic Synthetic Transformations. The Use of Natural Pigments and Vitamins in Photocatalysis. ChemCatChem 2022. [DOI: 10.1002/cctc.202200623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sebastián Barata‐Vallejo
- Departamento de Ciencias Químicas Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Junin 954 CP 1113- Buenos Aires Argentina
- Istituto per la Sintesis Organica e la Fotorreattivita, ISOF Consiglio Nazionale delle Ricerche Via P. Gobetti 101 40129 Bologna Italy
| | - Damian E. Yerien
- Departamento de Ciencias Químicas Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Junin 954 CP 1113- Buenos Aires Argentina
| | - Al Postigo
- Departamento de Ciencias Químicas Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Junin 954 CP 1113- Buenos Aires Argentina
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5
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Miao CB, Qiang XQ, Xu X, Song XQ, Zhou SQ, Lyu X, Yang HT. Synthesis of Stable N-H Imines with a Benzo[7,8]indolizine Core and Benzo[7,8]indolizino[1,2- c]quinolines via Copper-Catalyzed Annulation of α,β-Unsaturated O-Acyl Ketoximes with Isoquinolinium N-Ylides. Org Lett 2022; 24:3828-3833. [PMID: 35605016 DOI: 10.1021/acs.orglett.2c01386] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A copper-catalyzed annulation of α,β-unsaturated O-acyl ketoximes with isoquinolinium N-ylides has been developed for the concise synthesis of stable N-H imines with a benzo[7,8]indolizine core. When β-(2-bromoaryl)-α,β-unsaturated O-acyl ketoximes are used as the starting materials, a cascade cyclization occurs to afford the benzo[7,8]indolizino[1,2-c]quinolines.
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Affiliation(s)
- Chun-Bao Miao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Xiao-Qi Qiang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Xiaoli Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Xiao-Qing Song
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Su-Qing Zhou
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Xinyu Lyu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
| | - Hai-Tao Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China
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6
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Sharma AK, Jaiswal A, Chand S, Singh KN. Domino Reaction of Isatins with
α
‐Oxoketene‐
N
,
S
‐acetals: An Efficient Synthesis of Pyrrolo[3,4‐
c
]quinoline‐1,3‐diones and 2,3‐Dihydro‐1
H
‐pyrrolo[3,4‐
c
]quinolin‐1‐ones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anup Kumar Sharma
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Anjali Jaiswal
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Shiv Chand
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Krishna Nand Singh
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
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7
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Enríquez‐Cabrera A, Ridier K, Salmon L, Routaboul L, Bousseksou A. Complete and Versatile Post‐Synthetic Modification on Iron‐Triazole Spin Crossover Complexes: A Relevant Material Elaboration Method. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Alejandro Enríquez‐Cabrera
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Karl Ridier
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Lionel Salmon
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Lucie Routaboul
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Azzedine Bousseksou
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
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8
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Zheng L, Cai L, Tao K, Xie Z, Lai Y, Guo W. Progress in Photoinduced Radical Reactions using Electron Donor‐Acceptor Complexes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100009] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Liuhuan Cai
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Kailiang Tao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Zhen Xie
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Yin‐Long Lai
- College of Chemistry and Civil Engineering Shaoguan University Shaoguan 512005 P. R. China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
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9
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Ge Y, Yu N. Convenient one-step synthesis of quinoline-3,4-dicarboxylate derivatives. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2020.1828467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Youjin Ge
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
| | - Niefang Yu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
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10
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Subhash D, Bhaskar K. Design, Synthesis, Molecular Docking, and Antimicrobial Activity
of N-{(E)-[2-(Morpholin-4-yl)quinolin-3-yl]methylidene}aniline
Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020030203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Morpholine as ubiquitous pharmacophore in medicinal chemistry: Deep insight into the structure-activity relationship (SAR). Bioorg Chem 2020; 96:103578. [PMID: 31978684 DOI: 10.1016/j.bioorg.2020.103578] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/09/2019] [Accepted: 01/09/2020] [Indexed: 12/15/2022]
Abstract
Morpholine is a versatile moiety, a privileged pharmacophore and an outstanding heterocyclic motif with wide ranges of pharmacological activities due to different mechanisms of action. The ability of morpholine to enhance the potency of the molecule through molecular interactions with the target protein (kinases) or to modulate the pharmacokinetic properties propelled medicinal chemists and researchers to synthesize morpholine ring by the efficient ways and to incorporate this moiety to develop various lead compounds with diverse therapeutic activities. The present review primarily focused on discussing the most promising synthetic leads containing morpholine ring along with structure-activity relationship (SAR) to reveal the active pharmacophores accountable for anticancer, anti-inflammatory, antiviral, anticonvulsant, antihyperlipidemic, antioxidant, antimicrobial and antileishmanial activity. This review outlines some of the recent effective chemical synthesis for morpholine ring. The review also highlighted the metabolic liability of some clinical drugs containing this nucleus and various researches on modified morpholine to enhance the metabolic stability of drugs as well. Drugs bearing morpholine ring and those under clinical trials are also mentioned with the role of morpholine and their mechanism of action. This review will provide the necessary knowledge base to the medicinal chemists in making strategic structural changes in designing morpholine derivatives.
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12
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Li J, Bao W, Zhang Y, Rao Y. Cercosporin-photocatalyzed sp 3 (C-H) activation for the synthesis of pyrrolo[3,4-c]quinolones. Org Biomol Chem 2019; 17:8958-8962. [PMID: 31580376 DOI: 10.1039/c9ob01946d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We reported a new method that visible light along with cercosporin, one of the naturally occurring perylenequinonoid pigments with excellent properties of photosensitization, photocatalyzed sp3 (C-H) activation for the synthesis of pyrrolo[3,4-c]quinolones through the annulation of anilines and maleimides under mild conditions.
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Affiliation(s)
- Jia Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P. R. China.
| | - Wenhao Bao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P. R. China.
| | - Yan Zhang
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China.
| | - Yijian Rao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P. R. China.
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13
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Pujari VK, Vinnakota S, Kakarla RK, Maroju S, Ganesh A, Pervaram S. Microwave Assisted Synthesis and Antimicrobial Activity of (E)-1-{2/3/4-[(1-Aryl-1H-1,2,3-triazol-4-yl)methoxy]phenyl}-3-(2-morpholinoquinolin-3-yl)prop-2-en-1-ones. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363218070241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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Hsu CW, Sundén H. α-Aminoalkyl Radical Addition to Maleimides via Electron Donor–Acceptor Complexes. Org Lett 2018; 20:2051-2054. [DOI: 10.1021/acs.orglett.8b00597] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chien-Wei Hsu
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, 41296 Göteborg, Sweden
| | - Henrik Sundén
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, 41296 Göteborg, Sweden
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15
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Tomanová M, Jedinák L, Košař J, Kvapil L, Hradil P, Cankař P. Synthesis of 4-substituted pyrazole-3,5-diamines via Suzuki-Miyaura coupling and iron-catalyzed reduction. Org Biomol Chem 2017; 15:10200-10211. [PMID: 29177274 DOI: 10.1039/c7ob02373a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general and efficient synthesis of 4-substituted-1H-pyrazole-3,5-diamines was developed to access derivatives with an aryl, heteroaryl, or styryl group, which are otherwise relatively difficult to prepare. The first step is based on the Suzuki-Miyaura cross-coupling reaction utilizing the XPhos Pd G2 precatalyst. The coupling reactions of 4-bromo-3,5-dinitro-1H-pyrazole with the electron-rich/deficient or sterically demanding boronic acids enabled the production of the corresponding dinitropyrazoles. The subsequent iron-catalyzed reduction of both nitro groups with hydrazine hydrate accomplished the synthesis. The additional demethylation of the 4-methoxystyryl derivative allowed the production of the carboanalog of CAN508 reported as a selective CDK9 inhibitor.
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Affiliation(s)
- Monika Tomanová
- Institute of Molecular and Translation Medicine, Faculty of Medicine, Palacký University, Hněvotínská 5, 77900 Olomouc, Czech Republic
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16
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17
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Xu H, Zhou P, Zhou B, Zhou J, Shen Y, Lu LL, Yu FC. Convenient one-step synthesis of pyrrolo[3,4-c]quinolin-1-ones via TMSCl-catalyzed cascade reactions of isatins and β-enamino ketones. RSC Adv 2016. [DOI: 10.1039/c6ra15492a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A series of pyrrolo[3,4-c]quinolin-1-ones were afforded by TMSCl-catalyzed isatins and β-enamino ketones in high yields under mild conditions.
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Affiliation(s)
- Hui Xu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Pan Zhou
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Bei Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Jie Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Yuehai Shen
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Ling-Ling Lu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Fu-Chao Yu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
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18
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Xu H, Zhou B, Zhou P, Zhou J, Shen Y, Yu FC, Lu LL. Insights into the unexpected chemoselectivity in Brønsted acid catalyzed cyclization of isatins with enaminones: convenient synthesis of pyrrolo[3,4-c]quinolin-1-ones and spirooxindoles. Chem Commun (Camb) 2016; 52:8002-5. [DOI: 10.1039/c6cc02659a] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chemoselective [1+2+3] vs. cascade cyclization has been developed by switching Brønsted acid, offering a divergent synthesis of pyrrolo[3,4-c]quinolin-1-ones and spirooxindoles.
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Affiliation(s)
- Hui Xu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Bei Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Pan Zhou
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Jie Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Yuehai Shen
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Fu-Chao Yu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
| | - Ling-Ling Lu
- Faculty of Life Science and Technology
- Kunming University of Science and Technology
- Kunming
- P. R. China
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19
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A simple one-pot synthesis of quinoline-4-carboxylic acids by the Pfitzinger reaction of isatin with enaminones in water. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.11.070] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Liu CG, Gu ZY, Bai HW, Wang SY, Ji SJ. An isocyanide insertion approach to substituted pyrrolo[2,3-b]quinolines under metal-free and azide-free conditions. Org Chem Front 2016. [DOI: 10.1039/c6qo00373g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An isocyanide insertion approach to construct the pyrrolo[2,3-b]quinoline skeleton by an I2/CHP mediated reaction of aminome-thylenecyclo-propanes (amino-MCPs) is developed.
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Affiliation(s)
- Cheng-Guo Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
| | - Zheng-Yang Gu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
| | - Hui-Wen Bai
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
| | - Shun-Yi Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
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21
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Poreba M, Szalek A, Kasperkiewicz P, Rut W, Salvesen GS, Drag M. Small Molecule Active Site Directed Tools for Studying Human Caspases. Chem Rev 2015; 115:12546-629. [PMID: 26551511 DOI: 10.1021/acs.chemrev.5b00434] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Caspases are proteases of clan CD and were described for the first time more than two decades ago. They play critical roles in the control of regulated cell death pathways including apoptosis and inflammation. Due to their involvement in the development of various diseases like cancer, neurodegenerative diseases, or autoimmune disorders, caspases have been intensively investigated as potential drug targets, both in academic and industrial laboratories. This review presents a thorough, deep, and systematic assessment of all technologies developed over the years for the investigation of caspase activity and specificity using substrates and inhibitors, as well as activity based probes, which in recent years have attracted considerable interest due to their usefulness in the investigation of biological functions of this family of enzymes.
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Affiliation(s)
- Marcin Poreba
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology , Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Aleksandra Szalek
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology , Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Paulina Kasperkiewicz
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology , Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Wioletta Rut
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology , Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Guy S Salvesen
- Program in Cell Death and Survival Networks, Sanford Burnham Prebys Medical Discovery Institute , La Jolla, California 92037, United States
| | - Marcin Drag
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology , Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland
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Basavegowda N, Mishra K, Lee YR. Sonochemically synthesized ferromagnetic Fe3O4nanoparticles as a recyclable catalyst for the preparation of pyrrolo[3,4-c]quinoline-1,3-dione derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra11623b] [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] Open
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23
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Guo Z, Yan Z, Zhou X, Wang Q, Lu M, Liu W, Zhou H, Yang C, McClain EJ. Synthesis and biological evaluation of novel 1,2-benzisothiazol-3-one-derived 1,2,3-triazoles as caspase-3 inhibitors. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1259-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Direct Synthesis of Pyrrolo[3,4-c]quinolines from the Domino Reaction of Tosylmethyl Isocyanides and Aminochalcones. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400468] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Xia L, Idhayadhulla A, Lee YR, Kim SH, Wee YJ. Microwave-assisted synthesis of diverse pyrrolo[3,4-c]quinoline-1,3-diones and their antibacterial activities. ACS COMBINATORIAL SCIENCE 2014; 16:333-41. [PMID: 24749663 DOI: 10.1021/co500002s] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
With the aim of developing a general and practical method for library production, a novel and efficient two-phase microwave-assisted cascade reaction between isatins and β-ketoamides in [Bmim]BF4/toluene was developed for the synthesis of pyrrolo[3,4-c]quinoline-1,3-diones. The features of this methodology are, the use of microwave-assisted rapid synthesis, mild reaction conditions, high yields, operational simplicity, facile product separation, and recyclability. Furthermore, the antibacterial activities of the pyrrolo[3,4-c]quinoline-1,3-dione derivatives produced were evaluated against Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, and Enterobacter aerogenes) and Gram-positive bacteria (Bacillus cereus and Staphylococcus aureus). These derivatives showed antibacterial activities against Gram-positive strains that were at least equivalent to that against Gram-negative strains. Compound 7{3,5} displayed the most potent antibacterial activity against P. aeruginosa (MIC = 0.5 μg/mL) and greater activity than standard ampicillin (MIC = 1 μg/mL). Compound 7{4,7} exhibited the best inhibitory activity against E. coli and E. aerogenes (MIC = 1 and 0.5 μg/mL), compared with the standard ampicillin (both MICs = 1 μg/mL). The synthesized pyrrolo[3,4-c]quinoline-1,3-diones are expected to be widely used as lead compounds for the development of new antibacterial agents.
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Affiliation(s)
- Likai Xia
- School
of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Akber Idhayadhulla
- School
of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Yong Rok Lee
- School
of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Sung Hong Kim
- Analysis
Research Division, Daegu Center, Korea Basic Science Institute, Daegu 702-701, Republic of Korea
| | - Young-Jung Wee
- Department
of Food Science and Technology, Yeungnam University, Gyeongsan 712-749, Republic of Korea
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26
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Nagalakshmi RA, Suresh J, Kumar RR, Jeyachandran V, Lakshman PLN. (3aR*,8bR*)-3a,8b-Dihy-droxy-1-(4-methyl-phen-yl)-2-methyl-sulfanyl-3-nitro-1,8b-di-hydro-indeno-[1,2-b]pyrrol-4(3aH)-one. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o279-80. [PMID: 24764991 PMCID: PMC3998437 DOI: 10.1107/s1600536814002712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 02/05/2014] [Indexed: 11/11/2022]
Abstract
The asymmetric unit of the title compound, C19H16N2O5S, contains four independent molecules (A, B, C and D), with two molecules (B and D) displaying disorder in their methylsulfanyl groups [occupancy ratios of 0.797 (11):0.203 (11) and 0.85 (2):0.15 (2)]. The nitro groups are twisted slightly out of the planes of the 2-pyrroline rings to which they are bonded with dihedral angles of 10.17 (1), 8.01 (1), 9.44 (1) and 8.87 (1)° in molecules A, B, C and D, respectively. The 2-pyrroline rings are almost orthogonal to the attached tolyl rings, forming dihedral angles of 73.44 (1), 81.21 (1), 88.18 (8) and 73.94 (1)° for molecules A, B, C and D, respectively. A weak intramolecular O—H⋯O interaction is observed in molecules B and C. The two hydroxy groups in each molecule are involved in intermolecular O—H⋯O hydrogen bonding. In the crystal, molecules are connected via O—H⋯O and C—H⋯O hydrogen bonds, forming a complex three-dimensional network.
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Affiliation(s)
- R A Nagalakshmi
- Department of Physics, The Madura College, Madurai 625 011, India
| | - J Suresh
- Department of Physics, The Madura College, Madurai 625 011, India
| | - R Ranjith Kumar
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - V Jeyachandran
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - P L Nilantha Lakshman
- Department of Food Science and Technology, University of Ruhuna, Mapalana, Kamburupitiya 81100, Sri Lanka
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27
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Li C, Yang W, Liu H, Li M, Zhou W, Xie J. Crystal structures and antifungal activities of fluorine-containing thioureido complexes with nickel(II). Molecules 2013; 18:15737-49. [PMID: 24352026 PMCID: PMC6270642 DOI: 10.3390/molecules181215737] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 12/03/2013] [Accepted: 12/05/2013] [Indexed: 11/25/2022] Open
Abstract
Ni(II) complexes with N-2-fluorobenzoylpiperidine-1-carbothioimidate (L2-), N-4-fluorobenzoylpiperidine-1-carbothioimidate (L3-), N-2-fluorobenzoylmorpholine- 1-carbothioimidate (L5-) and N-4-fluorobenzoylmorpholine-1-carbothioimidate (L6-) have been synthesized and characterized by elemental analysis, FTIR and 1H-NMR. The crystal structures of three ligands (HL2, HL3 and HL6) and the corresponding Ni(II) complexes ([Ni(L2)2], [Ni(L3)2] and [Ni(L6)2]) have been determined by X-ray diffraction. The antifungal activities of the Ni(II) complexes together and the corresponding ligands against the fungi Botrytis cinerea, Trichoderma spp., Myrothecium and Verticillium spp. have been investigated. The experimental results showed that the ligands and their complexes have antifungal abilities. When the fluorine was substituted on the para-benzoyl moiety, the antifungal activity of the ligands was obviously increased. Moreover, the ligands were stronger than their complexes in inhibiting fungal activities. The antifungal ability of HL6 is especially strong, and similar to that of the commercial fungicide fluconazole.
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Affiliation(s)
| | | | | | | | - Weiqun Zhou
- College of Pharmacy, Nantong Tichen Health School, Nantong 226007, China.
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28
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Nagalakshmi RA, Suresh J, Jeyachandran V, Kumar RR, Lakshman PLN. (3aR,8bR)-3a,8b-Dihy-droxy-2-methyl-sulfanyl-3-nitro-1-phenyl-1,8b-di-hydro-indeno[1,2-b]pyrrol-4(3aH)-one. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1770-1. [PMID: 24454219 PMCID: PMC3885043 DOI: 10.1107/s1600536813029577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 10/27/2013] [Indexed: 11/11/2022]
Abstract
In the title compound, C18H14N2O5, the pyrrolidine ring adopts a shallow envelope conformation, with the C atom bearing the OH group (and remote from the N atom) displaced by 0.257 (2) Å from the other atoms. The cyclo-pentane ring has a twisted conformation about the C-C bond bearing one =O and one -OH grouping. The dihedral angle between the five-membered rings (all atoms) is 65.54 (9)° and the OH groups lie to the same side of the ring-junction. The mol-ecular structure features a weak intra-molecular O-H⋯O bond and a possible C-H⋯π inter-action. In the crystal, the mol-ecules are linked into [010] chains by O-H⋯O hydrogen bonds. Weak C-H⋯O bonds connect the chains into (100) sheets.
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Affiliation(s)
| | - J. Suresh
- Department of Physics, The Madura College, Madurai 625 011, India
| | - V. Jeyachandran
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - R. Ranjith Kumar
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - P. L. Nilantha Lakshman
- Department of Food Science and Technology, University of Ruhuna, Mapalana, Kamburupitiya 81100, Sri Lanka
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29
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Gök D, Kasımoğulları R, Cengiz M, Mert S. Utility of the Pfitzinger Reaction in the Synthesis of Novel Quinoline Derivatives and Related Heterocycles. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1607] [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]
Affiliation(s)
- Derviş Gök
- Department of Chemistry and Chemical Processing Technologies, Kutahya Vocational School; Dumlupinar University; 43100 Kutahya Turkey
| | - Rahmi Kasımoğulları
- Department of Chemistry, Faculty of Arts and Sciences; Dumlupinar University; 43100 Kutahya Turkey
| | - Mustafa Cengiz
- Department of Chemistry, Faculty of Arts and Sciences; Suleyman Demirel University; 32260 Isparta Turkey
| | - Samet Mert
- Department of Chemistry, Faculty of Arts and Sciences; Dumlupinar University; 43100 Kutahya Turkey
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30
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Pharmacophore modeling and docking studies on some nonpeptide-based caspase-3 inhibitors. BIOMED RESEARCH INTERNATIONAL 2013; 2013:306081. [PMID: 24089669 PMCID: PMC3780516 DOI: 10.1155/2013/306081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 07/23/2013] [Accepted: 07/23/2013] [Indexed: 11/17/2022]
Abstract
Neurodegenerative disorders are major consequences of excessive apoptosis caused by a proteolytic enzyme known as caspase-3. Therefore, caspase-3 inhibition has become a validated therapeutic approach for neurodegenerative disorders. We performed pharmacophore modeling on some synthetic derivatives of caspase-3 inhibitors (pyrrolo[3,4-c]quinoline-1,3-diones) using PHASE 3.0. This resulted in the common pharmacophore hypothesis AAHRR.6 which might be responsible for the biological activity: two aromatic rings (R) mainly in the quinoline nucleus, one hydrophobic (H) group (CH3), and two acceptor (A) groups (–C=O). After identifying a valid hypothesis, we also developed an atom-based 3D-QSAR model applying the PLS algorithm. The developed model was statistically robust (q2 = 0.53; pred_r2 = 0.80). Additionally, we have performed molecular docking studies, cross-validated our results, and gained a deeper insight into its molecular recognition process. Our developed model may serve as a query tool for future virtual screening and drug designing for this particular target.
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31
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Liu D, Tian Z, Yan Z, Wu L, Ma Y, Wang Q, Liu W, Zhou H, Yang C. Design, synthesis and evaluation of 1,2-benzisothiazol-3-one derivatives as potent caspase-3 inhibitors. Bioorg Med Chem 2013; 21:2960-7. [PMID: 23632366 DOI: 10.1016/j.bmc.2013.03.075] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 03/13/2013] [Accepted: 03/24/2013] [Indexed: 11/24/2022]
Abstract
A number of 1,2-benzisothiazol-3-one derivatives were prepared through structural modification of the original compound from high-throughput screening. Some analogues (e.g., 6b, 6r, 6s and 6w) were identified as novel and potent caspase inhibitors with IC50 of nanomolar. Structure-activity relationship (SAR) studies for caspase-3 inhibition were evaluated in vitro. Molecular modeling studies provided further insight into the interaction of this class of compounds with activated caspase-3. The present small molecule caspase-3 inhibitor with novel structures different from structures of known caspase inhibitors revealed a new direction for therapeutic strategies directed against diseases involving abnormally up-regulated apoptosis.
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Affiliation(s)
- Dazhi Liu
- College of Life Sciences, NanKai University, Tianjin 300071, China
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32
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Wang R, Xu XP, Meng H, Wang SY, Ji SJ. 3-Phenacylideneoxindoles with tosylmethyl isocyanide and MeOH through C–C bond cleavage: facile synthesis of pyrrole and 2H-pyrrolo[3,4-c]quinoline derivatives. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.11.088] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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33
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Avula S, Koppireddi S, Komsani JR, Nanubolu JB, Yadla R. One-pot two-component tandem multiple transformations in the synthesis of N,4-diaryl-2,3-dihydropyrrolo[3,4-c]quinolin-1,3-diones and their 3-thioxo-analogues under neat conditions. RSC Adv 2013. [DOI: 10.1039/c3ra43489c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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34
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Xia L, Lee YR. Efficient one-step synthesis of pyrrolo[3,4-c]quinoline-1,3-dione derivatives by organocatalytic cascade reactions of isatins and β-ketoamides. Org Biomol Chem 2013; 11:5254-63. [DOI: 10.1039/c3ob40791h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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He YQ, Chen JQ. Diethyl 4-methoxyoxalyl-3,5-diphenylpyrrolidine-2,2-dicarboxylate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1325. [PMID: 22590226 PMCID: PMC3344464 DOI: 10.1107/s160053681201392x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Accepted: 03/30/2012] [Indexed: 11/18/2022]
Abstract
In the title compound, C25H27NO7, the pyrrolidine ring exhibits an envelope conformation and the benzene rings form a dihedral angle of 33.47 (11)°. In the crystal, pairs of N—H⋯O hydrogen bonds link the molecules into centrosymmetric dimers. Weak C—H⋯O interactions link the dimers into layers parallel to the bc plane.
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36
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Häcker HG, Sisay MT, Gütschow M. Allosteric modulation of caspases. Pharmacol Ther 2011; 132:180-95. [DOI: 10.1016/j.pharmthera.2011.07.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Accepted: 06/15/2011] [Indexed: 12/19/2022]
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37
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Isatin 1,2,3-triazoles as potent inhibitors against caspase-3. Bioorg Med Chem Lett 2011; 21:1626-9. [DOI: 10.1016/j.bmcl.2011.01.110] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Revised: 01/24/2011] [Accepted: 01/25/2011] [Indexed: 12/12/2022]
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38
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He L. 3-Ethyl 2-methyl 8-bromo-2-phenyl-1,2,3,3a,4,9b-hexahydrochromeno[4,3- b]pyrrole-2,3-dicarboxylate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o3075. [PMID: 21589384 PMCID: PMC3011766 DOI: 10.1107/s1600536810044491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2010] [Accepted: 10/31/2010] [Indexed: 11/10/2022]
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39
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He L. Diethyl 4-acetyl-5-(2-nitro-phen-yl)pyrrolidine-2,2-dicarboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o3205. [PMID: 21589499 PMCID: PMC3011499 DOI: 10.1107/s1600536810045691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Accepted: 11/07/2010] [Indexed: 11/23/2022]
Abstract
The title compound, C(18)H(22)N(2)O(7), was synthesized by the 1,3-dipolar cyclo-addition reaction of but-3-en-2-one, diethyl 2-amino-malonate and 2-nitro-benzaldehyde. In the mol-ecule, the pyrrolidine ring possesses an envelope conformation. Inter-molecular N-H⋯O and C-H⋯O hydrogen bonds are present in the crystal structure.
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Affiliation(s)
- Long He
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, People’s Republic of China
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40
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Havran LM, Chong DC, Childers WE, Dollings PJ, Dietrich A, Harrison BL, Marathias V, Tawa G, Aulabaugh A, Cowling R, Kapoor B, Xu W, Mosyak L, Moy F, Hum WT, Wood A, Robichaud AJ. 3,4-Dihydropyrimido(1,2-a)indol-10(2H)-ones as potent non-peptidic inhibitors of caspase-3. Bioorg Med Chem 2009; 17:7755-68. [DOI: 10.1016/j.bmc.2009.09.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 09/17/2009] [Accepted: 09/18/2009] [Indexed: 12/01/2022]
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41
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He L. Diethyl 1-acetyl-4'-(4-chloro-phen-yl)-5'-(4-nitro-phen-yl)-2-oxospiro-[indoline-3,3'-pyrrolidine]-2',2'-dicarboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o2388. [PMID: 21577852 PMCID: PMC2970347 DOI: 10.1107/s160053680903551x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Accepted: 09/02/2009] [Indexed: 12/02/2022]
Abstract
In the title compound, C31H28ClN3O8, the pyrrolidine ring exhibits an envelope conformation, with the spiro C atom located at the flap position. A spiro junction links the oxindole ring system and the pyrrolidine ring. The planar oxindole ring system is twisted with respect to the nitrobenzene and chlorobenzene rings, with dihedral angles of 62.34 (11) and 75.93 (9)°, respectively. In the crystal, a weak C—H⋯O interaction links the molecules into chains and two intramolecular C—H⋯O close contacts are seen.
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Affiliation(s)
- Long He
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, People's Republic of China
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42
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Gunasekaran B, Kathiravan S, Raghunathan R, Renuga V, Manivannan V. 6-Phenyl-5a,6,6a,7,12,13a-hexahydro-5 H-benzo[6,7]indolizino[3,2- a]pyrrolizine. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o1454. [PMID: 21582758 PMCID: PMC2969265 DOI: 10.1107/s1600536809020091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Accepted: 05/26/2009] [Indexed: 05/26/2023]
Abstract
In the title compound, C23H22N2, the central pyrrolidine ring adopts an envelope conformation. The benzene ring of the hexahydropyrroloisoquinoline ring system makes dihedral angles of 83.43 (6) and 61.99 (10)°, respectively, with the phenyl and pyrrole rings. In the crystal structure, weak C—H⋯π interactions are observed.
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43
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Benzerka S, Bouraiou A, Bouacida S, Rhouati S, Belfaitah A. (3RS,4SR)-Methyl 4-(2-chloro-5,8-di-methoxy-quinolin-3-yl)-1-phenyl-pyrrolidine-3-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2089-90. [PMID: 21580954 PMCID: PMC2959501 DOI: 10.1107/s1600536808031838] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2008] [Accepted: 10/02/2008] [Indexed: 11/10/2022]
Abstract
The molecule of the title compound, C23H23ClN2O4, contains a quinolyl unit linked to a functionalized pyrrolidine system with a 3,4-trans arrangement of the substituents. The unit cell contains two stereoisomers that have the absolute stereochemistry 3S,4R and 3R,4S. The pyrrolidine ring adopts a twist conformation with pseudo-rotation parameters P = 258.2 (3)° and τ(M) = 35.3 (1)°. The packing is stabilized by C—H⋯π interactions and offset π–π stacking (centroid-to-centroid distance = 3.849 Å, interplanar distance = 3.293 Å and slippage = 1.994 Å) between phenyl rings, leading to a two-dimensional network.
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44
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Okun I, Malarchuk S, Dubrovskaya E, Khvat A, Tkachenko S, Kysil V, Kravchenko D, Ivachtchenko A. Screening for caspase-3 inhibitors: effect of a reducing agent on identified hit chemotypes. ACTA ACUST UNITED AC 2006; 11:694-703. [PMID: 16844966 DOI: 10.1177/1087057106289231] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
When studying cysteinyl proteases in general and caspases in particular, it is generally accepted that a reaction buffer must contain a reducing agent to prevent essential cysteinyl groups from spontaneous oxidation. Dithiothreitol (DTT) and beta-mercaptoethanol (beta-MCE) are 2 of the most broadly used reducing agents. While screening a library of small molecules against caspase-3, the authors have found that the nature of the reducing agent used, DTT or beta-MCE, dramatically affects screening results and leads to identification of nonoverlapping hits. Screening in DTT-containing buffer revealed few novel classes of small molecules that selectively and reversibly inhibit caspase-3 but failed to identify isatin sulfonamides recently found to be potent and selective caspase-3 inhibitors (false negatives). On the other hand, screening in the presence of beta-MCE failed to identify a series of hit compounds, 1,3-dioxo-2,3-dichloro-1H-pyrrolo[3,4-c]quinolines, discovered with DTT, whereas isatin sulphonamides in these conditions exhibited strong caspase-3 inhibition. In this work, the authors show that thiol-containing reducing agents can affect catalytic activity of caspase-3 and modify its thermostability in a redox-potential-independent manner. The authors speculate that the differential structural modifications of caspase-3 seen with different reducing agents represent structurally different caspase-3 conformations and are responsible for its differential sensitivity to small molecules of different chemotypes. Hence, selection of the reducing agent may dramatically affect the quality of high-throughput screening campaigns.
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Affiliation(s)
- Ilya Okun
- ChemDiv, Inc., San Diego, California 92121, USA.
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