作者:Hari K. Kadam、Salman Khan、Rupesh A. Kunkalkar、Santosh G. Tilve
DOI:10.1016/j.tetlet.2012.12.041
日期:2013.2
A new simple approach using environmentally benign, cheap, and easily recyclable graphite as a heterogeneous catalyst for the synthesis of quinoxalines is described. A library of pharmacologically interesting diphenylquinoxalines is prepared by the double condensation of substituted benzils, phenanthrene-9,10-dione, and benzoin with aromatic diamines in 71–93% yields at room temperature in ethanol
描述了一种使用环境友好,廉价且易于回收的石墨作为多相催化剂合成喹喔啉的简单方法。通过在室温下在乙醇中以71-93%的收率将取代的苯,菲-9,10-二酮和安息香与芳香族二胺进行双缩合,制得一个具有药理学意义的二苯基喹喔啉文库。脂肪族二胺以72-92%的产率从取代的苯甲醚中生成相应的二氢吡嗪。