Good yields of methyl 6-acetyl- or 6-cyano-3-amino-2-benzoyl-5-methyl-7-(5-substituted-2-furyl)indolizine-8-carboxylates (5a-5f) were obtained in the reaction of corresponding 5-acetyl- or 5-cyano-2-formyl-4-(5-substituted-2-furyl)-6-methyl-1,4-dihydropyridine-3-carboxylated (4a-4f) with 3-phenyl-3-oxopropanenitrile. Spectral properties of the indolizines 5 are discussed.
在反应中,将相应的5-乙酰基或5-氰基-2-甲酰基-4-(5-取代-2-呋喃基)-6-甲基-1,4-二氢吡啶-3-羧酸酯(4a-4f)与3-苯基-3-氧代丙腈反应,得到了甲基6-乙酰基或6-氰基-3-氨基-2-苯甲酰基-5-甲基-7-(5-取代-2-呋喃基)吲哚啉-8-羧酸酯(5a-5f)的良好收率。讨论了吲哚啉5的光谱特性。