A novel, one-pot, multicomponent synthesis of 5′-amino-2,2′-dioxospiro[indoline-3,3′-pyrrole]-4′-carbonitriles is described. The Knoevenagel condensation reaction between isatin derivatives and malononitrile gave the corresponding cyclic arylmethylidenemalononitriles that, on treatment with isocyanides, afforded 2,2′-dioxospiro-bis-γ-lactams in good to excellent yields.
描述了 5'-
氨基-2,2'-dioxospiro[indoline-3,3'-pyrrole]-4'-carbonitriles 的新型单锅多组分合成。
靛红衍
生物和
丙二腈之间的 Knoevenagel 缩合反应得到相应的环状芳亚甲基
丙二腈,在用异
氰化物处理后,以良好至极好的收率提供 2,2'-二氧螺环-双-γ-内酰胺。