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【结 构 式】 
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【分子编号】68820 【品名】(2R,3R,4S,5R)-2-(((Z)-3-amino-1-cyano-2-formamidoprop-1-en-1-yl)amino)-5-((benzoyloxy)methyl)tetrahydrofuran-3,4-diyl dibenzoate 【CA登记号】 |
【 分 子 式 】C31H24N4O8 【 分 子 量 】580.554 【元素组成】C 64.13% H 4.17% N 9.65% O 22.05% |
合成路线1
该中间体在本合成路线中的序号：(XIX)Condensation of 2,3,5-tri-O-benzoyl-β-D-ribofuranosyl bromide (X) with diaminomaleonitrile (XI) yields the ribofuranosyl diamine (XII), which is alternatively prepared by N-protection of diamine (XI) with TMSCl in the presence of HMDS in refluxing acetonitrile and subsequent coupling of the obtained bis(silylamine) (XIII) with the D-ribofuranosyl acetate (XIV) by means of TMSOTf in CH2Cl2. Cyclization of diamine (XII) with HC(OEt)3 in the presence of NaOMe in anisole affords the 4,5-dicyanoimidazole derivative (XV), which undergoes regioselective addition of NaOMe in MeOH to give imidate (XVI). Finally, Hofmann rearrangement of imidate (XVI) with NaOCl in the presence of NaOH yields imidazolecarbonitrile (V) .
Alternatively, formylation of diaminomaleonitrile (XI) with HCOOH in benzene leads to N-formyldiaminomaleonitrile (XVII) , which is then silylated with TMSCl in the presence of HMDS to yield the protected amine (XVIII). Finally, amine (XVIII) is condensed with the ribofuranosyl acetate (XIV) in the presence of TMSOTf in CH2Cl2 to give compound (XIX), which undergoes cyclization using AcOH in refluxing benzene yielding nitrile (XV) .
| 【1】 Ferris, J.P., Devadas, B., Huang, C.H., Ren, W.Y. Novel synthesis of 5-amino-1-(beta-D-ribofuranosyl)imidazole-4-carboxamide and 5-amino-1-(beta-D-ribopyranosyl)imidazole-4-carboxamide. J Org Chem 1985, 50(6): 747-54. |
| 【2】 Ohtsuka, Y. Chemistry of diaminomaleonitrile. 1. Selective preparations of monoformyldiaminomaleonitrile and imidazoles by reaction with formicacid. J Org Chem 1976, 41(4): 713-4. |
| 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) | 37430 | 5-amino-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydro-2-furanyl]-1H-imidazole-4-carbonitrile | C9H12N4O4 | 详情 | 详情 | |
| (X) | 33832 | [(2R,3S,4R)-3,4-bis(benzoyloxy)-5-bromotetrahydro-2-furanyl]methyl benzoate | C26H21BrO7 | 详情 | 详情 | |
| (XI) | 16903 | (Z)-2,3-diamino-2-butenedinitrile;diaminomaleonitrile | 1187-42-4 | C4H4N4 | 详情 | 详情 |
| (XII) | 68818 | (2R,3R,4S,5R)-2-((benzoyloxy)methyl)-5-(((Z)-1,3-diamino-1-cyanoprop-1-en-2-yl)amino)tetrahydrofuran-3,4-diyl dibenzoate | C30H24N4O7 | 详情 | 详情 | |
| (XIII) | 68815 | (Z)-4-amino-2,3-bis((trimethylsilyl)amino)but-2-enenitrile | C10H20N4Si2 | 详情 | 详情 | |
| (XIV) | 26984 | (2R,3R,4R,5S)-5-(acetoxy)-4-(benzoyloxy)-2-[(benzoyloxy)methyl]tetrahydro-3-furanyl benzoate | C28H24O9 | 详情 | 详情 | |
| (XV) | 68819 | (2R,3R,4S,5R)-2-(5-(aminomethyl)-4-cyano-1H-imidazol-1-yl)-5-((benzoyloxy)methyl)tetrahydrofuran-3,4-diyl dibenzoate | C31H22N4O7 | 详情 | 详情 | |
| (XVI) | 68821 | methyl 4-cyano-1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-1H-imidazole-5-carbimidate | C11H14N4O5 | 详情 | 详情 | |
| (XVII) | 68816 | N-formyldiaminomaleonitrile;(Z)-N-(1,3-diamino-1-cyanoprop-1-en-2-yl)formamide | C5H4N4O | 详情 | 详情 | |
| (XVIII) | 68817 | (Z)-N-(3-amino-1-cyano-2-((trimethylsilyl)amino)prop-1-en-1-yl)formamide | C8H12N4OSi | 详情 | 详情 | |
| (XIX) | 68820 | (2R,3R,4S,5R)-2-(((Z)-3-amino-1-cyano-2-formamidoprop-1-en-1-yl)amino)-5-((benzoyloxy)methyl)tetrahydrofuran-3,4-diyl dibenzoate | C31H24N4O8 | 详情 | 详情 |