一种从1 -trityl -1 H -pyrazol-4-ylboronate频哪醇酯合成具有可控制的大小,形状和空间体积的低聚(-1 H -pyrazol-4-yl)-芳烃的新方法。这种简单有效的方法可以以使吡唑NH完好无损地进一步修饰或配位到金属离子的方式应用于各种溴化芳族前体。这将能够合成新颖的生物活性分子和分子材料前体,而无需任何标准纯化和磨碎纯化技术即可实现。
4-Aryl-1-tritylpyrazoles were prepared from the cross coupling reaction of aryl Grignard reagents with 4-bromo-1-tritylpyrazoles in the presence of 0.2 mo1% PdCl2(dppf) as catalyst. To deprotect the trityl group, 4-phenyl-1-tritylpyrazole was reacted with TFA to produce 4-arylpyrazole in quantitative yield.