4aH-r, 2H-cis, 2-Hydroxy-2, 3, 4, 4a-tetrahydro-8, 9-methylenedioxy-6 (5H)-phenanthridone, which was an important compound lacking two hydroxyl groups at 3-and 4-position in the structure of lycoricidine, was synthesized and configuration of the hydroxyl group was comfirmed to be α-quassi-axial on the basis of NMR data. A new lactam cyclization technique using borontrifluoride etherate on the course from phenethyl isocyanates to the corresponding lactams was examined.
4aH-r, 2H-cis, 2-羟基-2, 3, 4, 4a-四氢-8, 9-亚甲基二氧-6 (5H)-
菲啶酮,这是一种重要的化合物,在
石蒜碱的结构中缺少3-和4-位置的两个羟基,已合成并确认羟基的构型为α-quassi-axial,基于核磁共振数据。 一种新的内酰胺环化技术,使用
三氟化硼乙醚在异
氰酸苯
乙酯到相应的内酰胺的过程中进行了研究。