New Pyrazolo[1′,5′:1,6]pyrimido[4,5-d]pyridazin-4 (3H)-ones Fluoroderivatives as Human A1 Adenosine Receptor Ligands

被引:0
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作者
Graziano, Alessia [1 ]
Giovannoni, Maria Paola [1 ]
Cilibrizzi, Agostino [1 ]
Crocetti, Letizia [1 ]
Dal Piaz, Vittorio [1 ]
Vergelli, Claudia [1 ]
Trincavelli, Maria Letizia [2 ]
Martini, Claudia [2 ]
Giacomelli, Chiara [2 ]
机构
[1] Dipartimento Sci Farmaceut, I-50019 Sesto Fiorentino, Italy
[2] Univ Pisa, Dipartimento Psichiatria Neurobiol Farmacol & Bio, I-56126 Pisa, Italy
关键词
Adenosine receptors; A(1) subtype; Ligands; Pyrazolo[1 ',5 ':1,6]pyrimido[4,5-d]pyridazin-4(3H)-ones; BEARING POLAR SUBSTITUENTS; POTENT; PHARMACOLOGY; DESIGN;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this paper we report the synthesis and biological evaluation of a new series of pyrazolo[1',5': 1,6] pyrimido[4,5-d]pyridazin-4(3H)-ones as human A(1) adenosine receptor ligands. The tricyclic scaffold was modified at position 6 and 9 by introducing small alkyl chains and substituted phenyls. The most interesting compounds showed Ki for A(1) in the submicromolar range (0.105-0.244 mu M) and the most interesting term (compound 4c) combined an appreciable affinity for A(1) (Ki = 0.132 mu M) with a good selectivity toward A(2A) (43% inhibition at 10 mu M) and A(3) (46% inhibition at 10 mu M).
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页码:648 / 655
页数:8
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