中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
北美黄连碱 | (+-)-β-hydrastine | 118-08-1 | C21H21NO6 | 383.401 |
—— | erythro-1-(2-bromo-3,4-dimethoxy-α-hydroxybenzyl)-2-methyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline acetate | —— | C23H28BrNO6 | 494.382 |
—— | Dehydrocordrastin | 58776-01-5 | C22H23NO6 | 397.428 |
—— | 2'-acetyl-4,5,6',7'-tetramethoxy-2'H-spiro[indan-2,1'-isoquinoline]-1,3-dione | 51491-35-1 | C23H21NO7 | 423.422 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (+/-)-cordrastine I | —— | C22H25NO6 | 399.444 |
Isoquinoline methiodides react with phthalides in the presence of sodium methoxide to give intermediates which may be reduced to phthalide isoquinolines with hydrogen or sodium cyanoborohydride. The predominant isomer formed is the erythro, which is also the more active compound when tested for central nervous system activity. The direct coupling of phthalides with dihydroisoquinoline methiodides under these conditions fails to occur.
The phthalideisoquinoline system has been synthesized from substituted 2-phenyl-1,3-indandiones as starting materials. The key step in the synthesis is the rearrangement of the spirobenzylisoquinoline ring system to the phthalideisoquinoline system. The diastereomeric cordrastines, I and II, have been synthesized by this method and their relative configurations have been established by comparison of their p.m.r. spectra with those of phthalideisoquinoline alkaloids of known configuration.