Structural manipulation on the catecholic fragment of dopamine D1 receptor agonist 1-phenyl-N-methyl-benzazepines
摘要:
A series of new benzazepines with modification on the catecholic fragment were designed. The 8-hydroxyl group, other than the 7-hydroxyl was confirmed crucial to the interaction with the dopamine D-1 receptor. Subsequent replacement of the 7-hydroxyl with benzylamino groups was found tolerable. 7-(m-Chlorophenyl)methylamino- and 7-(m- or o-tolyl)methylamino-substituted benzazepines 13b-d displayed K-i values of 270-370 nM at the D-1 receptor, which were slightly more potent than that of parent compound I. In addition, 7-(arylmethyl)amino-benzazepines 13a-c were found possessing high binding affinities less than 10 nM at the 5-HT2A receptor. Among them, the non-substituted 7-benzylamino analogue 13a was the most potent showing a K-i values of 4.5 nM at the 5-HT2A receptor and a 5-HT2A/D-1 selectivity of 147. (C) 2014 Elsevier Masson SAS. All rights reserved.
By repurposing a typical dopamine D-1/D-5 receptor agonist motif, C1-substituted-N3-benzazepine or benzazecine, into the classical RTK inhibitor 2,4-diaminopyrimidine skeleton, a series of new 2,4-diarylaminopyrimidine analogues (DAAPalogues) were developed. Compounds 7 and 8a were identified possessing high potency against both c-Met and ALK kinases. Compound 8a displayed appreciable antitumor efficacy at the dose of 1 mg/kg in the ALK-driven BF3/EML4-ALK xenograft mice model.