A new route to 5,6-diarylpyridazin-3-ones by metalation and cross-coupling of pyridazines
作者:F. Trécourt、A. Turck、N. Plé、A. Paris、G. Quéguiner
DOI:10.1002/jhet.5570320364
日期:1995.5
Starting from 3,6-dichloropyridazine, a new route is described to antihypertensive 5,6-diarylpyridazin-3-ones. This pathway comprises the regioselective metalation followed by a substitution of the trimethylsilyl moeity. The introduction of iodine by another metalation allowed the cross coupling of arylboronic acids. The 6-methoxy group was then cleaved to afford the pyridazinones.
从3,6-二氯哒嗪开始,描述了一种抗高血压的5,6-二芳基哒嗪-3-酮的新途径。该途径包括区域选择性金属化,随后是三甲基甲硅烷基部分的取代。通过另一种金属化引入的碘允许芳基硼酸的交叉偶联。然后将6-甲氧基裂解以得到哒嗪酮。