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【结 构 式】 
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【分子编号】50393 【品名】1-[[bis(tert-butoxycarbonyl)amino]methyl]-4-cyanobenzene 【CA登记号】 |
【 分 子 式 】C18H24N2O4 【 分 子 量 】332.39964 【元素组成】C 65.04% H 7.28% N 8.43% O 19.25% |
合成路线1
该中间体在本合成路线中的序号：(XVII)Reaction of 4-cyanobenzyl bromide (I) with bis(tert-butoxycarbonyl)imine (XVI) by means of NaH in THF gives the protected benzylamine (XVII), which is treated with hydroxylamine and Na2CO3 in ethanol/water to yield the N-hydroxybenzamidine (XVIII). Reduction of compound (XVIII) with H2 over Pd/C in HOAc/Ac2O affords the protected benzamidine (XIX), which is treated with benzyl chloroformate and NaOH in THF in order to obtain the fully protected compound (XX). Selective deprotection of (XX) with HCl gives 4-(benzyloxycarbonylamidino)benzylamine (V), which is condensed with the protected azetidine-2-carboxylic acid (XXI) to afford the corresponding amide (XXII). Boc-deprotection of (XXII) provides azetidine (XXIII), which is condensed with N-Boc-(R)-cyclohexylglycine (VII) to give the protected dipeptide (XI). Boc-deprotection of (XI) affords intermediate (XII), which is condensed with benzyl 2-bromoacetate (XIV) to give the melagatran precursor (XV). Finally, this compound is debenzylated by hydrogenation with H2 over Pd/C as before.
| 【2】 Hervé, Y.; Fournier, J.; De Nanteuil, G.; Leborgne, F.; Verbeuren, T.J.; Lila, C.; Gloanec, P.; Cadet, L.; Large scale preparation of protected 4-aminomethylbenzamidine. Application to the synthesis of the thrombin inhibitor melagatran. Synth Commun 1998, 28, 23, 4419. |
| 【1】 Bayes, M.; Silvestre, J.S.; Sorbera, L.A.; Castaner, J.; Melagatran and Ximelagatran. Drugs Fut 2001, 26, 12, 1155. |
| 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) | 14200 | 4-(Bromomethyl)benzonitrile; alpha-Bromo-p-tolunitrile | 17201-43-3 | C8H6BrN | 详情 | 详情 |
| (V) | 50386 | benzyl [4-(aminomethyl)phenyl](imino)methylcarbamate | C16H17N3O2 | 详情 | 详情 | |
| (VII) | 35619 | (2S)-2-[(tert-butoxycarbonyl)amino]-2-cyclohexylethanoic acid | C13H23NO4 | 详情 | 详情 | |
| (XI) | 50376 | benzyl [4-([[((2S)-1-[(2R)-2-[(tert-butoxycarbonyl)amino]-2-cyclohexylethanoyl]azetidinyl)carbonyl]amino]methyl)phenyl](imino)methylcarbamate | C33H43N5O6 | 详情 | 详情 | |
| (XII) | 50390 | benzyl (4-[[([(2S)-1-[(2R)-2-amino-2-cyclohexylethanoyl]azetidinyl]carbonyl)amino]methyl]phenyl)(imino)methylcarbamate | C28H35N5O4 | 详情 | 详情 | |
| (XIV) | 12869 | benzyl 2-bromoacetate | 5437-45-6 | C9H9BrO2 | 详情 | 详情 |
| (XV) | 50392 | benzyl 2-[((1R)-2-[(2S)-2-[([4-[[[(benzyloxy)carbonyl]amino](imino)methyl]benzyl]amino)carbonyl]azetidinyl]-1-cyclohexyl-2-oxoethyl)amino]acetate | C37H43N5O6 | 详情 | 详情 | |
| (XVI) | 48447 | Di-tert-butyl iminodicarboxylate; Iminodicarboxylic acid di-tert-butyl ester | 51779-32-9 | C10H19NO4 | 详情 | 详情 |
| (XVII) | 50393 | 1-[[bis(tert-butoxycarbonyl)amino]methyl]-4-cyanobenzene | C18H24N2O4 | 详情 | 详情 | |
| (XVIII) | 50394 | 1-[amino(hydroxyimino)methyl]-4-[[bis(tert-butoxycarbonyl)amino]methyl]benzene | C18H27N3O5 | 详情 | 详情 | |
| (XIX) | 50395 | 1-[amino(imino)methyl]-4-[[bis(tert-butoxycarbonyl)amino]methyl]benzene | C18H27N3O4 | 详情 | 详情 | |
| (XX) | 50396 | 1-[[[(benzyloxy)carbonyl]amino](imino)methyl]-4-[[bis(tert-butoxycarbonyl)amino]methyl]benzene | C26H33N3O6 | 详情 | 详情 | |
| (XXI) | 26205 | (2S)-1-(tert-butoxycarbonyl)-2-azetidinecarboxylic acid | C9H15NO4 | 详情 | 详情 | |
| (XXII) | 50397 | tert-butyl (2S)-2-[([4-[[[(benzyloxy)carbonyl]amino](imino)methyl]benzyl]amino)carbonyl]-1-azetidinecarboxylate | C25H30N4O5 | 详情 | 详情 | |
| (XXIII) | 50398 | benzyl [4-([[(2S)azetidinylcarbonyl]amino]methyl)phenyl](imino)methylcarbamate | C20H22N4O3 | 详情 | 详情 |