- Exploring Derivatives of Quinazoline Alkaloid l-Vasicine as Cap Groups in the Design and Biological Mechanistic Evaluation of Novel Antitumor Histone Deacetylase Inhibitors
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l-Vasicine is a quinazoline alkaloid with an electron dense ring and additional functionalities in its structure. Employing target oriented synthesis (TOS) based on in silico studies, molecules with significant docking scores containing different derivatives of l-vasicine as caps were synthesized. Interestingly, one molecule, i.e., 4a, which contained 3-hyroxypyrrolidine as a cap group and a six carbon long aliphatic chain as a linker was found to inhibit HDACs. 4a showed more specificity toward class I HDAC isoforms. Also 4a was found to be less cytotoxic toward normal cell lines as compared to cancer cell lines. 4a inhibited cancer cell growth and induced cell death by various mechanisms. However, 4a was found to induce cell death independent of ROS generation, and unlike many natural product based HDAC inhibitors, 4a was found to be nontoxic under in vivo conditions. Importantly, we for the first time report the possibility of using a 3-hydroxypyrrolidine cap for the synthesis of HDAC inhibitors with good potency.
- Ahmad, Mudassier,Aga, Mushtaq A.,Bhat, Javeed Ahmad,Kumar, Brijesh,Rouf, Abdul,Capalash, Neena,Mintoo, Mubashir Javeed,Kumar, Ashok,Mahajan, Priya,Mondhe, Dilip Manikrao,Nargotra, Amit,Sharma, Parduman Raj,Zargar, Mohmmad Afzal,Vishwakarma, Ram A.,Shah, Bhahwal Ali,Taneja, Subhash Chandra,Hamid, Abid
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p. 3484 - 3497
(2017/05/05)
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- Stereocontrolled dopamine receptor binding and subtype selectivity of clebopride analogues synthesized from aspartic acid
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Employing the achiral 4-aminopiperidine derivative clebopride as a lead compound, chiral analogues were developed displaying dopamine receptor binding profiles that proved to be strongly dependent on the stereochemistry. Compared to the D1 receptor, the t
- Einsiedel, Juergen,Weber, Klaus,Thomas, Christoph,Lehmann, Thomas,Huebner, Harald,Gmeiner, Peter
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p. 3293 - 3296
(2007/10/03)
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- Synthesis and structure-activity relationships of naphthamides as dopamine D3 receptor ligands
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A series of naphthamides were synthesized, and the affinities of these compounds were determined for dopamine D2 and D3 receptors using radioligand binding techniques. The naphthamide compounds that were prepared include N-(1- alkylp
- Huang,Luedtke,Freeman,Wu,Mach
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p. 1815 - 1826
(2007/10/03)
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- Phenyloxazoles and phenylthiazoles as benzamide bioisosteres: Synthesis and dopamine receptor binding profiles
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Conformationally restricted benzamide bioisosteres were investigated when the aminomethylpyrrolidine derivative 4o proved D3 as well as D4 binding properties which were comparable to those of the atypical neuroleptics sulpiride and clozapine, respectively. (C) 2000 Elsevier Science Ltd.
- Einsiedel, Juergen,Thomas, Christoph,Huebner, Harald,Gmeiner, Peter
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p. 2041 - 2044
(2007/10/03)
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- Fluoronaphthyridines and -quinolines as Antibacterial Agents. 5. Synthesis and Antimicrobial Activity of Chiral 1-tert-Butyl-6-fluoro-7-substituted-naphthyridones
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A series of novel 7-substituted-1-tert-butyl-6-fluoronaphthyridone-3-carboxylic acids has been prepared.These derivatives are characterized by chiral aminopyrrolidine substituents at the 7 position.In this paper we report the full details of the asymmetric synthesis of this series of compounds.Structure-activity relationship studies indicate that the absolute stereochemistry at the asymmetric centers of the pyrrolidine ring is critical for maintaining good activity.Compounds 60 and 61 (3-amino-4-methylpyrrolidine enantiomers) were selected for preclinical evaluation.
- Cesare, P. Di,Bouzard, D.,Essiz, M.,Jacquet, J. P.,Ledoussal, B.,et al.
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p. 4205 - 4213
(2007/10/02)
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- 1-tertiary-alkyl-substituted naphthyridine carboxylic acid antibacterial agents
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There are disclosed new naphthyridine- and quinoline-carboxylic acids having a 1-tertiary-alkyl substituent, compositions containing them, and their use in treating bacterial infections in warm-blooded animals. Also disclosed are novel amines and intermediates used in the preparation of the naphthyridine- and quinoline-carboxylic acids.
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