Biotransformation of Phenolic 1-Benzyl-<i>N</i>-methyltetrahydroisoquinolines in Plant Cell Cultures Followed by LC/NMR, LC/MS, and LC/CD
作者:Wenhua Cui、Kinuko Iwasa、Makiko Sugiura、Atsuko Takeuchi、Chisato Tode、Yumi Nishiyama、Masataka Moriyasu、Harukuni Tokuda、Kazuyoshi Takeda
DOI:10.1021/np068060r
日期:2007.11.1
(+/-)-1-Benzyl-N-methyltetrahydroisoquinolines 7-10 and 11-14 with one and two hydroxy groups on the aromatic rings, respectively, were fed individually to cultured cells of Corydalis and Macleaya species, respectively. The structures of the metabolites were determined by using combinatorial techniques, including LC/NMR, LC/MS-MS, and LC/CD. The enantiomeric excesses of the metabolites were derived from LC/CD and LC/MS-MS analyses. In cell cultures of Corydalis and Macleaya species, laudanine (7), with a hydroxy group at C-3', can form the berberine bridge at C-2' and C-6' to produce S- and R-enantiomers of 2,3,9,10- and 2,3,10,11-oxygenated protoberberines (20 and 21), respectively, whereas reticuline (11) and protosinomenine (12), incoporating a hydroxy group at C-3', form the berberine bridge at C-2' to furnish the S-enantiomer of 2,3,9,10-oxygenated protoberberines (23 and 21), respectively.
(±)-1-苄基-N-甲基四氢异喹啉类化合物(7-10 和 11-14),分别在芳香环上具有一个和两个羟基基团,被单独单独分别喂养了 CORS和 MAC细胞培养物。代谢物的结构通过组合技术确定,包括 LC/NMR、LC/MS-MS 和 LC/CD。代谢物的对映体过量通过 LC/CD 和 LC/MS-MS 分析得出。在 CORS和 MAC物种的细胞培养中,羟基位于 C-3' 的 Laudanine(7)可在 C-2' 和 C-6' 处形成小檗碱桥,分别产生 2,3,9,10- 和 2,3,10,11- 氧化的原小檗碱的 S-和 R-对映体(20 和 21),而羟基位于 C-3'的Reticuline(11)和Protosinomenine(12),分别在 C-2' 处形成小檗碱桥,提供 2,3,9,10- 氧化原小檗碱的 S-对映体(23 和 21)。