Substituted 2-(5-R-2-furylmrthylene-3-oxobutanenitriles IIa - IIIl were obtained by condensation of the corresponding 5-R-furaldhydes Ia - Il with 3-amino-2-butenenitrile in acid medium. Relation between the structure and spectral properties (NMR, IR, UV, MS) is presented and the influence of substituents in position 5 of the furan ring on the conjugated 2-furylethylene system is discussed.
通过在酸性介质中将相应的5-R-呋喃醛(Ia - Il)与3-氨基-2-丁烯腈缩合,得到了取代的2-(5-R-2-呋喃亚甲基-3-酮丙腈)(IIa - IIIl)。文章展示了结构与光谱特性(NMR、IR、UV、MS)之间的关系,并讨论了呋喃环5位取代基对共轭的2-呋喃乙烯系统的影响。