Addition of amines to α-(2-furyl)-β-(5-nitro-2-furyl) ethynyl (I) gave N-substituted α-(2-furyl)-β-(5-nitro-2-furyl) vinylamines. Bromination of I gave stereoisomers which were identified as E- and Z-forms, judging from their ultraviolet absorption spectra. The reaction of I with N-substituted pyridinium ylides was not uniform. Only the common indolizines, namely 3-substituted 1-(5-nitro-2-furyl)-2-(2-furyl) indolizines, were obtained by reaction in dioxane, whereas 3-substituted 1-(4-alkylated 5-nitro-2-furyl)-2-(2-furyl)-indolizines were isolated by reaction in dimethylformamide, together with the common indolizines.
在 α-(2-
呋喃基)-β-(5-硝基-2-
呋喃基)
乙炔基(I)上添加胺,可得到 N-取代的 α-(2-
呋喃基)-β-(5-硝基-2-
呋喃基)
乙烯基胺。I 的
溴化反应产生了立体异构体,根据它们的紫外吸收光谱,可确定为 E 型和 Z 型。I 与 N-取代的
吡啶鎓酰化物的反应并不一致。在
二噁烷中反应只得到了常见的
吲嗪类化合物,即 3-取代的 1-(5-硝基-2-
呋喃基)-2-(2-
呋喃基)
吲嗪类化合物,而在二甲基甲酰胺中反应则分离出了 3-取代的 1-(4-烷基化的 5-硝基-2-
呋喃基)-2-(2-
呋喃基)-
吲嗪类化合物以及常见的
吲嗪类化合物。