Synthesis, SAR, and Evaluation of 4-(2,4-Difluoro-5-(cyclopropylcarbamoyl)phenylamino)pyrrolo(2,1-f)(1,2,4)triazine -based VEGFR-2 kinase inhibitors.

摘要

Introduction of the 2,4-difluoro-5-(cyclopropylcarbamoyl)phenylamino group at the C-4 position of the pyrrolo[2,1-f][1,2,4] triazine scaffold led to the discovery of a novel sub-series of inhibitors of VEGFR-2 kinase activity. Subsequent SAR studies on the 1,3,5-oxadiazole ring appended to the C-6 position of this new sub-family of pyrrolotriazines resulted in the identification of low nanomolar inhibitors of VEGFR-2. Antitumor efficacy was observed with compound 37 against L2987 human lung carcinoma xenografts in athymic mice.