Studies on the chemical constituents of rutaceous plants. LXIV. Structural establishment of oxyterihanine, a phenolic benzo[c]phenanthridone alkaloid. Syntheses of phenolic benzo[c]phenanthridine alkaloids, terihanine and isoterihanine, and related compounds.
作者:HISASHI ISHII、IH-SHENG CHEN、SATOSHI UEKI、MISAKO AKAIKE、TSUTOMU ISHIKAWA
DOI:10.1248/cpb.35.2717
日期:——
The structure of oxyterihanine (2c), a new phenolic benzo [c] phenanthridone alkaloid which was isolated from Formosan Xanthoxylum nitidum (ROXB.) D. C. (Fagara nitida ROXB.), was established as 8-hydroxy-9-methoxy-5-methyl-2, 3-methylenedioxybenzo [c] phenanthridin-6 (5H) one by direct comparison with a synthetic specimen, which was derived from 2- (4-isopropoxy-3-methoxyphenyl) -6, 7-methylenedioxy-3, 4-dihydronaphthalen-1 (2H) -one (8a) through the synthetic sequence shown in Charts 3 and 4. 9-Hydroxy-8-methoxy-5-methyl-2, 3-methylenedioxybenzo [c] phenanthridin-6 (5H) -one [oxyisoterihanine (2d)] and two phenolic quaternary benzo [c] phenanthridine alkaloids, terihanine (1c) and isoterihanine (1d), were also synthesized.
oxyterihanine (2c) 是从台湾两面针 (Fagara nitida ROXB.) 中分离出来的一种新型酚类苯并[c]菲啶酮生物碱,其结构被确定为 8-羟基-9-甲氧基-5-甲基-2, 3-亚甲基二氧基苯并[c]菲啶-6 (5H) 1,通过与合成样品直接比较,合成样品衍生自 2- (4-异丙氧基-3-甲氧基苯基) -6, 7-亚甲基二氧基-3, 4-二氢萘-1 (2H) -酮 (8a) 通过图 3 和图 4 所示的合成顺序进行。 9-羟基-8-甲氧基-5-甲基-2, 3-亚甲基二氧基苯并[c] 菲啶-6 (5H) -酮还合成了[oxyisoterihanine (2d)]和两种酚季苯并[c]菲啶生物碱terihanine (1c) 和isoterihanine (1d)。