1,4-Benzoxazine-3(4H)-ones as potent inhibitors of platelet aggregation: Design, synthesis and structure-activity relations

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Abstract

A series of novel potentially platelet aggregation-inhibiting 1,4-benzoxazine-3(4H)-one derivatives was designed and synthesized through Smiles rearrangement, reduction and acetylation reactions. The antiaggregatory activities of the target molecules on arterial blood samples from rabbits, expressed by IC50values (μM), were then evaluated in vitro against ADP induced platelet aggregation. The favorable IC50values of compound 8c (IC50=8.99 μM) and 8d (IC50=8.94 μM) indicated that these two compounds were the most potent molecules among all the synthesized compounds. A detailed molecular docking study to explore the interaction of compounds 8c and 8d with GP IIb/IIIa receptor showed that they these two compounds were docked into the active site of GPIIb/IIIa receptor. These results suggest that the 1,4-benzoxazine-3(4H)-one derivatives are promising lead compounds to develop new platelet aggregation inhibitors.

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Liu, C., Tan, J. L., Xiao, S. Y., Liao, J. F., Zou, G. R., Ai, X. X., … Zuo, H. (2014). 1,4-Benzoxazine-3(4H)-ones as potent inhibitors of platelet aggregation: Design, synthesis and structure-activity relations. Chemical and Pharmaceutical Bulletin, 62(9), 915–920. https://doi.org/10.1248/cpb.c14-00330

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