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【结 构 式】 
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【分子编号】20345 【品名】(5-methyl-2-oxo-1,3-dioxol-4-yl)methyl (7R)-7-amino-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 【CA登记号】 |
【 分 子 式 】C16H16N4O6S3 【 分 子 量 】456.5244 【元素组成】C 42.1% H 3.53% N 12.27% O 21.03% S 21.07% |
合成路线1
该中间体在本合成路线中的序号：(XII)3) The reaction of the 7-aminocephem derivative (VI) with ethyl acetoacetate (IX) at room temperature gives the 3-aminocrotonate derivative (X), which is esterified with dioxolone (II) as before yielding the ester derivative (XI). The acidic (HCl) hydrolysis of (XI) in methanol-dichloromethane affords the 7-aminocephem derivative (XII) , which is finally condensed with 2-O-(tert-butoxycarbonyl-L-alanyl)mandelic acid (VII) by means of dicyclohexylcarbodiimide (DCC) in dichloromethane to yield the protected product (V), already obtained.
| 【1】 Nishizawa, S.; et al. (Kyoto Pharmaceutical Industries, Ltd.); Production of cephalosporin compounds.. JP 85034975 . |
| 【2】 Nishizawa, S.; Tamaki, S.; Kakeya, N.; Kitao, K. (Kyoto Pharmaceutical Industries, Ltd.); Cephalosporin cpds.. WO 8505360 . |
| 【3】 Prous, J.; Castaner, J.; CEFCANEL DALOXATE HYDROCHLORIDE < Prop INNM >. Drugs Fut 1989, 14, 1, 13. |
| 【4】 Kakeya, N.; Nishizawa, S.; Nishimura, K.; Yoshimi, A.; Tamaki, S.; Mori, T.; Kitao, K.; KY-109, A new bifunctional pro-drug of a cephalosporin. Chemistry, physico-chemical and biological properties. J Antibiot 1985, 38, 3, 380-9. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (V) | 20338 | (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl (7R)-7-[[(2R)-2-([2-[(tert-butoxycarbonyl)amino]propanoyl]oxy)-2-phenylethanoyl]amino]-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | C32H35N5O11S3 | 详情 | 详情 | |
| (VI) | 20340 | (11R)-2,2,8-trimethyl-4,6,9-trioxo-11-phenyl-3,5,10-trioxa-7-azadodecan-12-oic acid | C17H21NO8 | 详情 | 详情 | |
| (VII) | 20339 | (7R)-7-amino-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 30246-33-4 | C11H12N4O3S3 | 详情 | 详情 |
| (IX) | 11819 | ethyl acetoacetate; ethyl 3-oxobutanoate；Acetoacetic ester;Ethyl beta-ketobutyrate;ethyl 3-oxobutyrate | 141-97-9 | C6H10O3 | 详情 | 详情 |
| (X) | 20343 | (7R)-7-[[(Z)-4-ethoxy-1-methyl-3,4-dioxo-1-butenyl]amino]-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C18H20N4O6S3 | 详情 | 详情 | |
| (XI) | 20344 | (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl (7R)-7-[[(Z)-4-ethoxy-1-methyl-3,4-dioxo-1-butenyl]amino]-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | C23H24N4O9S3 | 详情 | 详情 | |
| (XII) | 20345 | (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl (7R)-7-amino-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | C16H16N4O6S3 | 详情 | 详情 |