substrate scope. Application of these products has been demonstrated by the synthesis of pyrroles and pyrazoles in good yields. The reaction of β-ketosulfones with nitroallylic acetates yields tetrasubstituted sulfonyl furans through a cascade SN2′-intramolecular Michael reaction, followed by aromatization. The gram-scale synthesis of a representative example of sulfonylfurans was carried out to demonstrate
β-酮砜与不同的α-官能化的硝基烯烃反应可得到取代的磺酰基
呋喃和二氢
呋喃。此外,β-酮砜通过级联的迈克尔加成环化方案与α-
溴硝基烯烃和α-
肼基硝基烯烃反应,分别得到带有关键磺酰基的硝基二氢
呋喃和
肼基二氢
呋喃,具有优异的收率,具有广泛的底物范围。这些产品的应用已通过高产率合成
吡咯和
吡唑得到了证明。β-酮砜与硝基
烯丙基乙酸酯的反应通过级联S N生成四取代的磺酰
呋喃2'-分子内迈克尔反应,然后进行芳构化。进行了克规模的磺酰
呋喃代表性实例的合成,以证明该方法的合成效率。