The L-proline-catalyzed three-component synthesis of novel 3-methyl-1-aryl-1H-pyrazolo[3,4-b]pyridines in good yields from the reaction of 3-methyl-1-aryl-1H-pyrazol-5-amines, 1,3-dicarbonyl compounds and aromatic aldehydes in ethanol is described. This domino transformation presumably involves the formation of two C–C bonds and one C–N bond in a single synthetic operation.
从3-甲基-1-芳基-1 H-的反应中,L-脯氨酸催化三组分合成新型3-甲基-1-芳基-1 H-吡唑并[3,4- b ]吡啶的产率很高。描述了在乙醇中的吡唑-5-胺,1,3-二羰基化合物和芳族醛。这种多米诺骨牌转变可能涉及在一个合成操作中形成两个C–C键和一个C–N键。