|
【结 构 式】 
|
【分子编号】41230 【品名】(4aS,6R,8aS)-6-hydroxy-11-methyl-5,6,9,10,11,12-hexahydro-4aH-[1]benzofuro[3a,3,2-ef][2]benzazepin-3-yl methylcarbamate 【CA登记号】 |
【 分 子 式 】C18H22N2O4 【 分 子 量 】330.38376 【元素组成】C 65.44% H 6.71% N 8.48% O 19.37% |
合成路线1
该中间体在本合成路线中的序号：(III)The demethylation of galanthamine (I) with ethyl mercaptane sodium salt in hot DMF gives 6-demethylgalanthamine (II), which is selectively monoesterified at the phenolic OH with N-methylcarbamic acid and CDI yielding the monoester (III). Finally this compound is esterified again at the remaining OH with isobutyric anhydride (IV) and TEA or DMAP affording the target diester. The selective monoesterification of (II) can also be performed with N-methylcarbamic anhydride and TEA or DMAP, with N-methylcarbamoyl chloride and DBU, or with N-methylisocyanate and K2CO3.
| 【1】 Bores, G.M.; Kosley, R.W. Jr.; Galanthamine derivatives for the treatment of Alzeimer's disease. Drugs Fut 1996, 21, 6, 621. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (A) | 39110 | Sodium 1-ethanethiolate; Sodium ethylmercaptide | 811-51-8 | C2H5NaS | 详情 | 详情 |
| (I) | 41226 | (4aS,6R,8aS)-3-methoxy-11-methyl-5,6,9,10,11,12-hexahydro-4aH-[1]benzofuro[3a,3,2-ef][2]benzazepin-6-ol | 357-70-0 | C17H21NO3 | 详情 | 详情 |
| (II) | 41227 | (4aS,6R,8aS)-11-methyl-5,6,9,10,11,12-hexahydro-4aH-[1]benzofuro[3a,3,2-ef][2]benzazepine-3,6-diol | C16H19NO3 | 详情 | 详情 | |
| (III) | 41230 | (4aS,6R,8aS)-6-hydroxy-11-methyl-5,6,9,10,11,12-hexahydro-4aH-[1]benzofuro[3a,3,2-ef][2]benzazepin-3-yl methylcarbamate | C18H22N2O4 | 详情 | 详情 | |
| (IV) | 22334 | 1-methylpropionic anhydride | 97-72-3 | C8H14O3 | 详情 | 详情 |