RT Journal Article T1 2-Aryladenine derivatives as a potent scaffold for adenosine receptor antagonists: the 6-Morpholino derivatives A1 Areias, Filipe A1 Correia, Carla A1 Rocha, Ashly A1 Teixeira, Sofia A1 Castro Pérez, Marián A1 Brea Floriani, José Manuel A1 Hu, Huabin A1 Carlsson, Jens A1 Loza García, María Isabel A1 Proença, M. Fernanda A1 Carvalho, M. Alice K1 G protein-coupled receptors K1 Adenine derivatives K1 Adenosine receptor antagonists K1 2-arylpurine derivatives K1 Structure-activity relationship AB A set of 2-aryl-9-H or methyl-6-morpholinopurine derivatives were synthesized and assayed through radioligand binding tests at human A1, A2A, A2B, and A3 adenosine receptor subtypes. Eleven purines showed potent antagonism at A1, A3, dual A1/A2A, A1/A2B, or A1/A3 adenosine receptors. Additionally, three compounds showed high affinity without selectivity for any specific adenosine receptor. The structure-activity relationships were made for this group of new compounds. The 9-methylpurine derivatives were generally less potent but more selective, and the 9H-purine derivatives were more potent but less selective. These compounds can be an important source of new biochemical tools and/or pharmacological drugs PB MDPI YR 2024 FD 2024-05-28 LK https://hdl.handle.net/10347/45595 UL https://hdl.handle.net/10347/45595 LA eng NO Areias, F., Correia, C., Rocha, A., Teixeira, S., Castro, M., Brea, J., Hu, H., Carlsson, J., Loza, M. I., Proença, M. F., & Carvalho, M. A. (2024). 2-Aryladenine Derivatives as a Potent Scaffold for Adenosine Receptor Antagonists: The 6-Morpholino Derivatives. Molecules, 29(11), 2543. https://doi.org/10.3390/molecules29112543 NO This research was funded by the Portuguese Fundação para a Ciência e Tecnologia/Ministério da Educação e Ciência (MEC) through funds in the framework of the Strategic Funding of CQUM (UID/QUI/00686/2020), (UID/QUI/00686/2018), FEDER funds through the Operational Programme for Competitiveness Factors (COMPETE 2020), Programa Operacional de Competitividade e Internacionalização (POCI) (POCI-01-0145-FEDER-031354) Rede Nacional de RMN (PINFRA/22161/2016), and PhD grants to Carla Correia and Ashly Rocha (SFRH/BD/22270/2005; SFRH/BD/85937/2012), Xunta de Galicia (ED431C 2022/20), and the European Regional Development Fund (ERDF). Filipe Areias gratefully acknowledges the Post-PhD grant from the Portuguese FCT (SFRH/BPD/26106/2005). J.C. received funding from the Olle Engkvist Foundation (219-0154) and the Swedish Research Council (2021-4186). The LECO instrument for elemental analysis TruSpec Micro CHN was purchased within the PT-OPENSCREEN project (NORTE-01—0145-FEDER-085468), financed by CCDR-N DS Minerva RD 23 abr 2026