名称:
2-Amino-1,3,4-thiadiazoles in the 7-hydroxy-N-neopentyl spiropiperidine indolinyl series as potent P2Y1 receptor antagonists
摘要:
Blockade of the P2Y(1) receptor is important to the treatment of thrombosis with potentially improved safety margins compared with P2Y(12) receptor antagonists. Investigation of a series of urea surrogates of the diaryl urea lead 3 led to the discovery of 2-amino-1,3,4-thiadiazoles in the 7-hydroxy-N-neopentyl spiropiperidine indolinyl series as potent P2Y(1) receptor antagonists, among which compound 5a was the most potent and the first non-urea analog with platelet aggregation (PA) IC50 less than 0.5 mu M with 10 mu M ADP. Several 2-amino-1,3,4-thiadiazole analogs such as 5b and 5f had a more favorable pharmacokinetic profile, such as higher C-trough, lower Cl, smaller V-dss, and similar bioavailability compared with 3. (C) 2014 Elsevier Ltd. All rights reserved.