carbon nucleophiles afforded Michael adducts depending on the type of nucleophilic reagents and medium (acidic or basic). The adducts 2 and 3 were used as key starting materials to synthesize some heterocyclic compounds, which include pyridazinone, furanone, 1,2‐oxazin‐5‐one, 1.2‐diazapine, pyrane, and hydroxyl pyridine derivatives. The Steric factor plays an important role in regioselectivity. The structure
根据亲核试剂和介质(酸性或碱性)的类型,4-(4-乙酰
氨基/
溴苯基)-4-氧代丁-2-烯酸与碳亲核试剂的反应可生成迈克尔加合物。加合物2和3被用作合成某些
杂环化合物的关键原料,这些化合物包括
哒嗪酮,
呋喃酮,1,2-恶嗪-5-酮,1.2-重氮平,
吡喃和羟基
吡啶衍生物。立体因子在区域选择性中起重要作用。通过元素分析和光谱数据阐明了新合成化合物的结构。