Synthetic studies on lycoricidine and related compounds. I. Synthesis of 4aH-r,2-H-cis,2-hydroxy-8,9-methylenedioxy-2,3,4,4a-tetrahydro-6(5H)-phenanthridone.
作者:SHUNSAKU OHTA、SHOSHICHIRO KIMOTO
DOI:10.1248/cpb.24.2969
日期:——
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。