Structure–activity relationships in a series of 8-substituted xanthines as A1-adenosine receptor antagonists
摘要:
A series of X-substituted xanthines were synthesized and their affinity in vitro towards A(1), A(2A)-adenosine receptors was evaluated by radioligand receptor binding assays. All compounds showed a greater affinity and selectivity towards the A(1)-adenosine receptor than theophylline. The compounds in which the n-proyl group is in 1-position of the xanthine nucleus and the pyridazinone system in 8-position is linked through a chain of two or four carbon atoms, showed the highest affinity and selectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.
Structure–activity relationships in a series of 8-substituted xanthines as A1-adenosine receptor antagonists
摘要:
A series of X-substituted xanthines were synthesized and their affinity in vitro towards A(1), A(2A)-adenosine receptors was evaluated by radioligand receptor binding assays. All compounds showed a greater affinity and selectivity towards the A(1)-adenosine receptor than theophylline. The compounds in which the n-proyl group is in 1-position of the xanthine nucleus and the pyridazinone system in 8-position is linked through a chain of two or four carbon atoms, showed the highest affinity and selectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.
Novel thioamide derivatives containing a pyridazine group
申请人:Morishita Pharmaceutical Co., Ltd.
公开号:US04242512A1
公开(公告)日:1980-12-30
Novel pyridazine-containing thioamide derivatives of the formula ##STR1## wherein R.sub.1 is ##STR2## wherein A is hydrogen, methyl, phenyl or mercapto, and B is hydrogen or phenyl; R.sub.2 is hydrogen or methyl; R.sub.3 is hydrogen, methyl or phenyl; R.sub.4 is hydrogen or methyl; and n is zero or 1. The derivatives have outstanding gastric antisecretory activity.
A series of X-substituted xanthines were synthesized and their affinity in vitro towards A(1), A(2A)-adenosine receptors was evaluated by radioligand receptor binding assays. All compounds showed a greater affinity and selectivity towards the A(1)-adenosine receptor than theophylline. The compounds in which the n-proyl group is in 1-position of the xanthine nucleus and the pyridazinone system in 8-position is linked through a chain of two or four carbon atoms, showed the highest affinity and selectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.