Universität zu Köln

Renk, Dana R., Skraban, Marcel, Bier, Dirk, Schulze, Annette, Wabbals, Erika, Wedekind, Franziska, Neumaier, Felix ORCID: 0000-0002-6376-6391, Neumaier, Bernd and Holschbach, Marcus (2021). Design, synthesis and biological evaluation of Tozadenant analogues as adenosine A(2A) receptor ligands. Eur. J. Med. Chem., 214. ISSY-LES-MOULINEAUX: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER. ISSN 1768-3254

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Abstract

With the aim to obtain potent adenosine A(2A) receptor (A(2A)R) ligands, a series of eighteen derivatives of 4-hydroxy-N-(4-methoxy-7-morpholin-4-yl-1,3-benzo[d]thiazol- 2-yl)-4-methylpiperidine-1-carboxamide (SYN-115, Tozadenant) were designed and synthesized. The target compounds were obtained by a chemical building block principle that involved reaction of the appropriate aminobenzothiazole phenyl carbamates with either commercially available or readily synthesized functionalized piperidines. Their affinity and subtype selectivity with regard to human adenosine A(1)-and A(2A) receptors were determined using radioligand binding assays. K-i values for human A(2A)R ranged from 2.4 to 38 nM, with more than 120-fold selectivity over A(1) receptors for all evaluated compounds except 13k which had a K-i of 361 nM and 18-fold selectivity. The most potent fluorine-containing derivatives 13e, 13g and 13l exhibited K-i values of 4.9 nM, 3.6 nM and 2.8 nM for the human A(2A)R. Interestingly, the corresponding values for rat A(2A)R were found to be four to five times higher. Their binding to A(2A)R was further confirmed by radiolabeling with F-18 and in vitro autoradiography in rat brain slices, which showed almost exclusive striatal binding and complete displacement by the A(2A)R antagonist ZM 241385. We conclude that these compounds represent potential candidates for the visualization of the A(2A) receptor and open pathways to novel therapeutic treatments of neurodegenerative disorders or cancer. (C) 2021 Elsevier Masson SAS. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Renk, Dana R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Skraban, Marcel UNSPECIFIED UNSPECIFIED UNSPECIFIED Bier, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Schulze, Annette UNSPECIFIED UNSPECIFIED UNSPECIFIED Wabbals, Erika UNSPECIFIED UNSPECIFIED UNSPECIFIED Wedekind, Franziska UNSPECIFIED UNSPECIFIED UNSPECIFIED Neumaier, Felix UNSPECIFIED orcid.org/0000-0002-6376-6391 UNSPECIFIED Neumaier, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Holschbach, Marcus UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-584558
DOI:	10.1016/j.ejmech.2021.113214
Journal or Publication Title:	Eur. J. Med. Chem.
Volume:	214
Date:	2021
Publisher:	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Place of Publication:	ISSY-LES-MOULINEAUX
ISSN:	1768-3254
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ANTAGONISTS; BRAIN; SLEEP; PET Multiple languages Chemistry, Medicinal Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58455