(-)-Tsukushinamine-A (1) and (-)-tsukushinamine-B (2), new cagetype lupin alkaloids from Sophora franchetiana Dunn (Leguminosae), were synthesized by means of intramolecular photocyclization from a common lupin alkaloid (-)-rhombifoline (7), coexisting in the same plant. The other (-)-cytisine-type alkaloids, (-)-N-methylcytisine (9) and (-)-N-ethylcytisine (8), were also transformed into the (-)-tsukushinamine-type alkaloids (4-6) in the same way.
(-)-Tsukushinamine-A (1)和(-)-tsukushinamine-B(2)是豆科植物 Sophora franchetiana Dunn(Sophora franchetiana Dunn)中新的包囊型
羽扇豆生物碱,它们是通过分子内光环合成法,由共存于同一植物中的常见
羽扇豆生物碱(-)-rhombifoline (7)合成的。其他(-)-
胞嘧啶类
生物碱(-)-N-甲基
胞嘧啶(9)和(-)-N-乙基
胞嘧啶(8)也以同样的方法转化成了(-)-tsukushinamine 类
生物碱(4-6)。