Treatment of 2-[(2-arylimino-2-cyano-1,1-dimethylethyl)arylamino]-3-methylbut-2-enenitrile 15, prepared by reactions of N-aryl α-cyanoenamines 3 with Cu(OAc)2·H2O (2 equiv.) in the presence of pyridine (2 equiv.) in EtOH at reflux, and with Cu(OAc)2·H2O (1 equiv.) in HOAc at reflux gave 2-(2,3-dihydro-2,2-dimethyl-3-oxo-1H-indol-1-yl)-3-methylbut-2-enenitriles 11 in moderate to good yields.
2-[(2- 芳基亚
氨基-2-
氰基-
1,1-二甲基乙基)芳基
氨基]-3-甲基丁-2-烯腈 15 是由 N-芳基 α-
氰胺 3 与 Cu(OAc)2-
H2O (2 等量.和 Cu(OAc)2- (1 等量) 在 HOAc 中的反应,得到 2-(2,3-二氢-2,2-二甲基-3-氧代-1H-
吲哚-1-基)-3-甲基丁-2-烯腈 11,收率中等至良好。