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【结 构 式】 
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【分子编号】21554 【品名】(6R,7R)-3-[(acetoxy)methyl]-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 【CA登记号】 |
【 分 子 式 】C15H16ClN3O8S 【 分 子 量 】433.82616 【元素组成】C 41.53% H 3.72% Cl 8.17% N 9.69% O 29.5% S 7.39% |
合成路线1
该中间体在本合成路线中的序号：(I)1) The methanolysis of 3-(acetoxymethyl)-7-[4-chloro-3-oxo-2(Z)-(methoxyimino)butyrylamidol-3-cephem-4-carboxylic acid (I) with methanol and NaHCO3 gives the corresponding 3-(methoxymethyl) derivative (II), which is esterified with 1-iodoethylisopropyl carbonate (III) by means of dicyclohexylamine in DMA to afford the corresponding ester (IV). Finally, this compound is cyclized with thiourea (V) and methyl iodide in a phosphate buffer.
| 【1】 Fujimoto, K.; Nakayama, E.; Nakao, H. (Sankyo Co., Ltd.); Process for preparing 3-alkoxymethylcephalosporin derivatives. DE 3244457 . |
| 【2】 Fujimoto, K.; Ishihara, S.; Yanagisawa, H.; Ide, J.; Nakayama, E.; Nakao, H.; Sugawara, S.; Iwata, M.; Studies on orally active cephalosporin esters. J Antibiot 1987, 40, 3, 370. |
| 【3】 Castaner, J.; Serradell, M.N.; Cefpodoxime Proxetil. Drugs Fut 1988, 13, 1, 16. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 27347 | N,N-dicyclohexylamine | 101-83-7 | C12H23N | 详情 | 详情 | |
| (I) | 21554 | (6R,7R)-3-[(acetoxy)methyl]-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C15H16ClN3O8S | 详情 | 详情 | |
| (II) | 21555 | (6R,7R)-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C14H16ClN3O7S | 详情 | 详情 | |
| (III) | 15685 | 1-iodoethyl isopropyl carbonate | C6H11IO3 | 详情 | 详情 | |
| (V) | 10180 | Thiourea | 62-56-6 | CH4N2S | 详情 | 详情 |
| (VI) | 21558 | (6R,7R)-7-[[2-(2-amino-1,3-thiazol-4-yl)-2-(methoxyimino)acetyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C15H17N5O6S2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(I)2) The free acid (II) can be cyclized with thiourea in a similar way as before to give 7-[2 (2-amino-thiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(methoxymethyl)-3-cephem 4-carboxylic acid (VI), which is finally esterified with the iodoester (III) as before.
| 【1】 Fujimoto, K.; Nakayama, E.; Nakao, H. (Sankyo Co., Ltd.); Process for preparing 3-alkoxymethylcephalosporin derivatives. DE 3244457 . |
| 【2】 Castaner, J.; Serradell, M.N.; Cefpodoxime Proxetil. Drugs Fut 1988, 13, 1, 16. |
| 【3】 Fujimoto, K.; Ishihara, S.; Yanagisawa, H.; Ide, J.; Nakayama, E.; Nakao, H.; Sugawara, S.; Iwata, M.; Studies on orally active cephalosporin esters. J Antibiot 1987, 40, 3, 370. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (I) | 21554 | (6R,7R)-3-[(acetoxy)methyl]-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C15H16ClN3O8S | 详情 | 详情 | |
| (II) | 21555 | (6R,7R)-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C14H16ClN3O7S | 详情 | 详情 | |
| (III) | 15685 | 1-iodoethyl isopropyl carbonate | C6H11IO3 | 详情 | 详情 | |
| (IV) | 21559 | 1-[(isopropoxycarbonyl)oxy]ethyl (6R,7R)-7-[[4-chloro-2-(methoxyimino)-3-oxobutanoyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | C20H26ClN3O10S | 详情 | 详情 | |
| (V) | 10180 | Thiourea | 62-56-6 | CH4N2S | 详情 | 详情 |