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【结 构 式】 
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【分子编号】42993 【品名】methyl (2S)-2-amino-5-[[(benzyloxy)carbonyl]amino]pentanoate 【CA登记号】 |
【 分 子 式 】C14H20N2O4 【 分 子 量 】280.32388 【元素组成】C 59.99% H 7.19% N 9.99% O 22.83% |
合成路线1
该中间体在本合成路线中的序号：(II)Conversion of amino acid (I) into its methyl ester derivative (II) by means of SOCl2 in MeOH, followed by coupling with ethyl isocyanatoacetate (III) and Et3N in CH2Cl2/THF yields derivative (IV). Cyclization of (IV) by means of H2O/HCl affords hydantoin (V), which reacts with 2-methylthio-2-imidazoline (VI) in an aqueous NaOH solution to provide cyclic guanidine derivative (VII). Treatment of amino acid (VIII) with isobutylene (IX) and H2SO4 in dioxane affords t-Bu ester (X), which then couples with (VII) by means of HOBt and DCC in DMF to furnish derivative (XI). Finally, tert-butyl ester is hydrolyzed by treatment with TFA in the presence of 1,2-dimercaptoethane.
| 【1】 Knolle, J.; Peyman, A.; Wehner, V.; et al.; RGD mimetics containing a central hydantoin scaffold: alphavbeta3 vs alphaIIbbeta3 selective requirements. Bioorg Med Chem Lett 2000, 10, 2, 179. |
| 【2】 Wehner, V.; Knolle, J.; Stilz, H.U.; Carniato, D.; Gourvest, J.-F.; Gadek, T.; McDowell, R. (Aventis SA); Inhibitors of bone resorption and vitronectin receptor antagonists. DE 19626701; DE 19635522; EP 0796855 . |
| 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) | 30898 | (2S)-2-amino-5-[[(benzyloxy)carbonyl]amino]pentanoic acid | C13H18N2O4 | 详情 | 详情 | |
| (II) | 42993 | methyl (2S)-2-amino-5-[[(benzyloxy)carbonyl]amino]pentanoate | C14H20N2O4 | 详情 | 详情 | |
| (III) | 18312 | ETHYL ISOCYANATOACETATE; ethyl 2-isocyanatoacetate | 2949-22-6 | C5H7NO3 | 详情 | 详情 |
| (IV) | 42994 | 12-ethyl 8-methyl (8S)-3,10-dioxo-1-phenyl-2-oxa-4,9,11-triazadodecane-8,12-dicarboxylate | C19H27N3O7 | 详情 | 详情 | |
| (V) | 42295 | (2R)-N-methyl-2-(methylamino)-3-(2-naphthyl)-N-[(1R)-2-oxo-1-(2-thienylmethyl)-2-(1,2,2-trimethylhydrazino)ethyl]propanamide | C25H32N4O2S | 详情 | 详情 | |
| (VI) | 42996 | 4,5-dihydro-1H-imidazol-2-yl methyl sulfide; 2-(methylsulfanyl)-4,5-dihydro-1H-imidazole | 5464-11-9 | C4H8N2S | 详情 | 详情 |
| (VII) | 42997 | 2-[(4S)-4-[3-(4,5-dihydro-1H-imidazol-2-ylamino)propyl]-2,5-dioxoimidazolidinyl]acetic acid | C11H17N5O4 | 详情 | 详情 | |
| (VIII) | 18008 | (2S)-3-amino-2-[[(benzyloxy)carbonyl]amino]propionic acid; N(alpha)-Z-L-2,3-diaminopropionic acid | 35761-26-3 | C11H14N2O4 | 详情 | 详情 |
| (IX) | 15926 | 2-methyl-1-propene; isobutylene | 115-11-7 | C4H8 | 详情 | 详情 |
| (X) | 18009 | tert-butyl (2S)-3-amino-2-[[(benzyloxy)carbonyl]amino]propanoate | C15H22N2O4 | 详情 | 详情 | |
| (XI) | 42998 | tert-butyl (2S)-2-[[(benzyloxy)carbonyl]amino]-3-[(2-[(4S)-4-[3-(4,5-dihydro-1H-imidazol-2-ylamino)propyl]-2,5-dioxoimidazolidinyl]acetyl)amino]propanoate | C26H37N7O7 | 详情 | 详情 |