A series of spiro compounds was achieved by triphenylphosphine-catalyzed [3+2] cycloaddition between active methylenemalononitrile and ethyl 2,3-butadienoate. Careful investigation showed that the present method had high regioselectivity. The products have a spirooxindole skeleton, which is a motif common in many natural products and pharmaceutically active compounds.
通过
三苯基膦催化的[3+2]环加成反应,成功合成了一系列螺旋化合物,反应物为活性亚甲基马隆腈和乙基2,3-
丁二烯酸酯。细致的研究表明,该方法具有较高的区域选择性。产物呈现出螺氧
吲哚骨架,这是一种在许多自然产物和药效活性化合物中常见的结构特征。