A series of pyrimidine benzamide-based thrombopoietin receptor agonists is described. The lead molecule contains a 2-amino-5-unsubstituted thiazole, a group that has been associated with idiosyncratic toxicity. The potential for metabolic oxidation at C-5 of the thiazole, the likely source of toxic metabolites, was removed by substitution at C-5 or by replacing the thiazole with a thiadiazole. Potency in the series was improved by modifying the substituents on the pyrimidine and/or on the thiazole or thiadiazole pendant aryl ring. In vivo examination revealed that compounds from the series are not highly bioavailable. This is attributed to low solubility and poor permeability. (C) 2007 Elsevier Ltd. All rights reserved.
A series of pyrimidine benzamide-based thrombopoietin receptor agonists is described. The lead molecule contains a 2-amino-5-unsubstituted thiazole, a group that has been associated with idiosyncratic toxicity. The potential for metabolic oxidation at C-5 of the thiazole, the likely source of toxic metabolites, was removed by substitution at C-5 or by replacing the thiazole with a thiadiazole. Potency in the series was improved by modifying the substituents on the pyrimidine and/or on the thiazole or thiadiazole pendant aryl ring. In vivo examination revealed that compounds from the series are not highly bioavailable. This is attributed to low solubility and poor permeability. (C) 2007 Elsevier Ltd. All rights reserved.
A compound of the formula (I) useful as promoters of thrombopoiesis and megakaryocytopoiesis, wherein A, B, D, E, W, X, Y, Z, R
1
and R
2
are defined as above.
[EN] TROMBOPOIETIN RECEPTOR AGONISTS<br/>[FR] AGONISTES DU RECEPTEUR DE THROMBOPOIETINE
申请人:PFIZER PROD INC
公开号:WO2006033005A2
公开(公告)日:2006-03-30
A compound of the formula (I) useful as promoters of thrombopoiesis and megakaryocytopoiesis, wherein A, B, D, E, W, X, Y, Z, R1 and R2 are defined as above.