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【结 构 式】 
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【分子编号】29873 【品名】(2R,3R,4S,5R)-5-(6-chloro-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate 【CA登记号】 |
【 分 子 式 】C36H28ClFN4O4 【 分 子 量 】635.0939832 【元素组成】C 68.08% H 4.44% Cl 5.58% F 2.99% N 8.82% O 10.08% |
合成路线1
该中间体在本合成路线中的序号：(II)The reaction of 3-hydroxymethyl-7-[2-(2-furyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid (I) with chlorosulfonyl isocyanate (II) and then with sodium 2-ethylhexanoate gives sodium cefuroxime (III), which is then treated with 1-bromoethyl acetate (IV) in DMA.
| 【1】 Gregson, M.; Sykes, R.B. (Glaxo Group Ltd.); Cephalosporins antibiotics. DE 2706413; FR 2340950; JP 52100494; US 4267320 . |
| 【2】 Crisp, H.A.; Clayton, J.C. (Glaxo Group Ltd.); Amorphous form of cefuroxime ester. DE 3327449; EP 0107276; FR 2531087; GB 2127401; JP 59044391; US 4562181; US 4820833; US 4994567; US 55013833 . |
| 【3】 Serradell, M.N.; Castaner, J.; Cefuroxime Axetil. Drugs Fut 1985, 10, 2, 112. |
| 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) | 28972 | (6R,7R)-7-[[2-(2-furyl)-2-(methoxyimino)acetyl]amino]-3-(hydroxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | C15H15N3O7S | 详情 | 详情 | |
| (II) | 29873 | (2R,3R,4S,5R)-5-(6-chloro-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C36H28ClFN4O4 | 详情 | 详情 | |
| (III) | 28974 | sodium (6R,7R)-3-[[(aminocarbonyl)oxy]methyl]-7-[[2-(2-furyl)-2-(methoxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | C16H15N4NaO8S | 详情 | 详情 | |
| (IV) | 12282 | 1-bromoethyl acetate | C4H7BrO2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(IV)A new synthesis of lodenosine has been described: The selective benzoylation of the 6-chloropurine riboside (I) with benzoyl chloride and triethylamine through the formation of a complex with dibutyl tin oxide, gives the 3'-O-benzoyl derivative (II), which is purified by crystallization (minor impurities, about 3%, of the 2'-O derivative are present). The protection of the primary OH group of (II) by reaction with trityl chloride, DMAP and Et3N in DMF yields the 5'-O-trityl derivative (III), which is treated with DAST and pyridine to afford the fluorinated arabinofuranoside (IV). The reaction of (IV) with ammonia in methanol displaces the 6-Cl atom and hydrolyzes the 3'-O-benzoyl group giving the fluorinated arabinofuranosyladenine (V). The reaction of (V) with phenyl chlorothionoformate and DMAP in acetonitrile yields the thiocarbonate (VI), which is treated with tris(trimethylsilyl)silane and AIBN in hot toluene to afford the 3'-deoxy compound (VII). Finally, this compound is deprotected by reaction with HCl in methanol/water.
| 【1】 Izawa, K.; Satoh, Y.; Takamatsu, S.; Kozai, S.; Maruyama, T.; Synthesis of 9-(2-deoxy-2-fluoro-beta-D-arabinofuranosyl)adenine bearing selectively removable protecting group. Chem Pharm Bull 1999, 47, 7, 966. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 25805 | 1-[(chlorocarbothioyl)oxy]benzene; Phenylchlorothioformate | 1005-56-7 | C7H5ClOS | 详情 | 详情 | |
| (I) | 18716 | 6-chloropurine riboside; (2R,3R,4S,5R)-2-(6-chloro-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydro-3,4-furandiol | 2004-06-0 | C10H11ClN4O4 | 详情 | 详情 |
| (II) | 29871 | (2R,3S,4R,5R)-5-(6-chloro-9H-purin-9-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydro-3-furanyl benzoate | C17H15ClN4O5 | 详情 | 详情 | |
| (III) | 29872 | (2R,3S,4R,5R)-5-(6-chloro-9H-purin-9-yl)-4-hydroxy-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C36H29ClN4O5 | 详情 | 详情 | |
| (IV) | 29873 | (2R,3R,4S,5R)-5-(6-chloro-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C36H28ClFN4O4 | 详情 | 详情 | |
| (V) | 29874 | (2R,3R,4S,5R)-5-(6-amino-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanol | C29H26FN5O3 | 详情 | 详情 | |
| (VI) | 29875 | O-[(2R,3R,4S,5R)-5-(6-amino-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl] O-phenyl carbonothioate | C36H30FN5O4S | 详情 | 详情 | |
| (VII) | 29876 | 9-[(2R,3S,5S)-3-fluoro-5-[(trityloxy)methyl]tetrahydro-2-furanyl]-9H-purin-6-ylamine; 9-[(2R,3S,5S)-3-fluoro-5-[(trityloxy)methyl]tetrahydro-2-furanyl]-9H-purin-6-amine | C29H26FN5O2 | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(V)An improved synthesis of lodenosine has been reported: The reaction of the chloropurine derivative (I) with trityl chloride and diisopropylamine in DMF gives the 5'-O-trityl-purine (II), which is treated with benzoyl chloride and pyridine in toluene to afford the 3'-O-benzoyl-5'-O-trityl-purine (III) -- some of the 2'-O-benzyl regioisomer is also isolated and is recycled after acyl migration by reaction with TEA. The reaction of purine (III) with trifluoromethanesulfonyl chloride and DMAP in toluene yields the 3'-O-benzoyl-2'-O-sulfonyl-5'-O-trityl-purine (IV), which is treated with HF and TEA to provide the 2'-beta-fluoro-purine (V). The reaction of compound (V) with ammonia in methanol gives the adenosine derivative (VI), which is treated with O-phenyl chlorothioformate and DMAP in pyridine to yield the thiocarbonate (VIII). The deoxygenation of (VIII) is performed with diphenylsilane and AIBN affording 5'-O-trityl-lodenosine (IX), which is finally deprotected with 80% HOAc.
| 【1】 Katayama, S.; Hirose, N.; Izawa, K.; Takamatsu, S.; Maruyama, T.; Improved synthesis of 9-(2,3-dideoxy-2-fluoro-beta-D-threo-pentofuranosyl)adenine (FddA) using triethylamine trihydrofluoride. Tetrahedron Lett 2001, 42, 12, 2321. |
| 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) | 18716 | 6-chloropurine riboside; (2R,3R,4S,5R)-2-(6-chloro-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydro-3,4-furandiol | 2004-06-0 | C10H11ClN4O4 | 详情 | 详情 |
| (II) | 48718 | (2R,3R,4S,5R)-2-(6-chloro-9H-purin-9-yl)-5-[(trityloxy)methyl]tetrahydro-3,4-furandiol | C29H25ClN4O4 | 详情 | 详情 | |
| (III) | 29872 | (2R,3S,4R,5R)-5-(6-chloro-9H-purin-9-yl)-4-hydroxy-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C36H29ClN4O5 | 详情 | 详情 | |
| (IV) | 48719 | (2R,3R,4R,5R)-5-(6-chloro-9H-purin-9-yl)-4-[[(trifluoromethyl)sulfonyl]oxy]-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C37H28ClF3N4O7S | 详情 | 详情 | |
| (V) | 29873 | (2R,3R,4S,5R)-5-(6-chloro-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl benzoate | C36H28ClFN4O4 | 详情 | 详情 | |
| (VI) | 29875 | O-[(2R,3R,4S,5R)-5-(6-amino-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl] O-phenyl carbonothioate | C36H30FN5O4S | 详情 | 详情 | |
| (VII) | 25805 | 1-[(chlorocarbothioyl)oxy]benzene; Phenylchlorothioformate | 1005-56-7 | C7H5ClOS | 详情 | 详情 |
| (VIII) | 29875 | O-[(2R,3R,4S,5R)-5-(6-amino-9H-purin-9-yl)-4-fluoro-2-[(trityloxy)methyl]tetrahydro-3-furanyl] O-phenyl carbonothioate | C36H30FN5O4S | 详情 | 详情 | |
| (IX) | 29876 | 9-[(2R,3S,5S)-3-fluoro-5-[(trityloxy)methyl]tetrahydro-2-furanyl]-9H-purin-6-ylamine; 9-[(2R,3S,5S)-3-fluoro-5-[(trityloxy)methyl]tetrahydro-2-furanyl]-9H-purin-6-amine | C29H26FN5O2 | 详情 | 详情 |