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【结 构 式】 
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【分子编号】52525 【品名】ethyl 2-[3-(2-amino-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate 【CA登记号】 |
【 分 子 式 】C25H32N2O2 【 分 子 量 】392.54136 【元素组成】C 76.5% H 8.22% N 7.14% O 8.15% |
合成路线1
该中间体在本合成路线中的序号：(XIII)The (S)-methyl tryptamine (XIII) was protected as the N-Boc derivative (XIV), and its ethyl ester group was then hydrolyzed with KOH to provide acid (XV). Coupling of (XV) with isoquinuclidine (XVI) in the presence of PyBOP gave amide (XVII). Cleavage of the N-Boc group of (XVII) was carried out employing trifluoroacetic acid in anisole. The resultant amine (XVIII) was condensed with 2,4-dinitrobenzenesulfonyl chloride (XIX) under modified Schotten-Baumann conditions to afford the sulfonamide (XX). Mitsunobu coupling of sulfonamide (XX) with 4-(2-hydroxyethyl)pyridine (XXI) gave adduct (XXII). The sulfonyl group of (XXII) was finally removed by treatment with neat propylamine to yield the title secondary amine.
| 【1】 Ashton, W.T.; et al.; Orally, bioavailable, indole-based nonpeptide GnRH receptor antagonists with high potency and functional activity. Bioorg Med Chem Lett 2001, 11, 19, 2597. |
| 【2】 Chu, L.; Wyvratt, M.J.; Ponpipom, M.M.; Lin, P.; Ashton, W.T.; Goulet, M.; Young, J.; Girotra, N.N.; Fisher, M.H. (Merck & Co., Inc.); Antagonists of gonadotropin releasing hormone. EP 1095038; WO 0004013 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XIII) | 52525 | ethyl 2-[3-(2-amino-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate | C25H32N2O2 | 详情 | 详情 | |
| (XIV) | 52526 | ethyl 2-[3-[2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-1-methylethyl]-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate | C30H40N2O4 | 详情 | 详情 | |
| (XV) | 52527 | 2-[3-[2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-1-methylethyl]-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoic acid | C28H36N2O4 | 详情 | 详情 | |
| (XVI) | 52528 | 2-azabicyclo[2.2.2]octane | C7H13N | 详情 | 详情 | |
| (XVII) | 52529 | 1,1-dimethylethyl 2-[5-[2-(2-azabicyclo[2.2.2]oct-2-yl)-1,1-dimethyl-2-oxoethyl]-2-(3,5-dimethylphenyl)-1H-indol-3-yl]propylcarbamate | C35H47N3O3 | 详情 | 详情 | |
| (XVIII) | 52530 | 2-[3-(2-amino-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-1-(2-azabicyclo[2.2.2]oct-2-yl)-2-methyl-1-propanone | C30H39N3O | 详情 | 详情 | |
| (XIX) | 52531 | 2,4-dinitrobenzenesulfonyl chloride | C6H3ClN2O6S | 详情 | 详情 | |
| (XX) | 52532 | N-{2-[5-[2-(2-azabicyclo[2.2.2]oct-2-yl)-1,1-dimethyl-2-oxoethyl]-2-(3,5-dimethylphenyl)-1H-indol-3-yl]propyl}-2,4-dinitrobenzenesulfonamide | C36H41N5O7S | 详情 | 详情 | |
| (XXI) | 52533 | 2-(4-Pyridinyl)-1-ethanol; 2-Pyridin-4-ylethanol | C7H9NO | 详情 | 详情 | |
| (XXII) | 52534 | N-{2-[5-[2-(2-azabicyclo[2.2.2]oct-2-yl)-1,1-dimethyl-2-oxoethyl]-2-(3,5-dimethylphenyl)-1H-indol-3-yl]propyl}-2,4-dinitro-N-[2-(4-pyridinyl)ethyl]benzenesulfonamide | C43H48N6O7S | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(XIII)In an alternative procedure, tryptamine (XIII) was acylated with 4-pyridylacetic acid (XXIII) to afford amide (XXIV), which was further reduced to the secondary amine (XXV) with borane in THF. Ester group hydrolysis in (XXV), followed by coupling of the resultant acid (XXVI) with isoquinuclidine (XVI), furnished the target amide.
| 【1】 Ashton, W.T.; et al.; Orally, bioavailable, indole-based nonpeptide GnRH receptor antagonists with high potency and functional activity. Bioorg Med Chem Lett 2001, 11, 19, 2597. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XIII) | 52525 | ethyl 2-[3-(2-amino-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate | C25H32N2O2 | 详情 | 详情 | |
| (XVI) | 52528 | 2-azabicyclo[2.2.2]octane | C7H13N | 详情 | 详情 | |
| (XXIII) | 17883 | 2-(4-pyridinyl)acetic acid | 28356-58-3 | C7H7NO2 | 详情 | 详情 |
| (XXIV) | 52537 | ethyl 2-[2-(3,5-dimethylphenyl)-3-(1-methyl-2-{[2-(4-pyridinyl)acetyl]amino}ethyl)-1H-indol-5-yl]-2-methylpropanoate | C32H37N3O3 | 详情 | 详情 | |
| (XXV) | 52535 | ethyl 2-[2-(3,5-dimethylphenyl)-3-(1-methyl-2-{[2-(4-pyridinyl)ethyl]amino}ethyl)-1H-indol-5-yl]-2-methylpropanoate | C32H39N3O2 | 详情 | 详情 | |
| (XXVI) | 52536 | 2-[2-(3,5-dimethylphenyl)-3-(1-methyl-2-{[2-(4-pyridinyl)ethyl]amino}ethyl)-1H-indol-5-yl]-2-methylpropanoic acid | C30H35N3O2 | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(VIII)The reaction of 2(R)-methylcyclopropanecarboxylic acid (I) with (COCl)2 gives the corresponding acyl chloride (II), which is treated with N,O-dimethylhydroxylamine (III) and TEA to yield the amide (IV). The condensation of (IV) with 3,5-dimethylphenyl bromide (V) by means of BuLi in THF affords the benzoylcyclopropane (VI), which is cyclized with 2-(4-hydrazinophenyl)-2-methylpropionic acid ethyl ester (VII) in refluxing ethanol to provide the indole derivative (VIII) (1). The reaction of the amino group of (VIII) with 2,4-dinitrophenylsulfonyl chloride (IX) and collidine in dichloromethane gives the corresponding sulfonamide (X), which is condensed with 2-(1,2,3-benzotriazol-5-yl)ethanol (XI) by means of PPh3, DEAD and propylamine in benzene to yield the secondary amine (XII). The hydrolysis of the ester group of (XII) by means of KOH in methanol/THF affords the propionic acid derivative (XIII), which is finally condensed with 2-azabicyclo[2,2,2]octane (XIV) by means of PyBOP and TEA in dichloromethane to provide the target indole derivative.
| 【1】 Young, J.R.; et al.; 2-Arylindoles as gonadotropin releasing hormone (GnRH) antagonists: Optimization of the tryptamine side chain. Bioorg Med Chem Lett 2002, 12, 5, 827. |
| 【2】 Chu, L.; Wyvratt, M.J.; Ponpipom, M.M.; Lin, P.; Ashton, W.T.; Goulet, M.; Young, J.; Girotra, N.N.; Fisher, M.H. (Merck & Co., Inc.); Antagonists of gonadotropin releasing hormone. EP 1095038; WO 0004013 . |
| 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) | 55763 | (2R)-2-methylcyclopropanecarboxylic acid | C5H8O2 | 详情 | 详情 | |
| (II) | 55764 | (2R)-2-methylcyclopropanecarbonyl chloride | C5H7ClO | 详情 | 详情 | |
| (III) | 13361 | (Methoxyamino)methane; N,O-Dimethylhydroxylamine | 1117-97-1 | C2H7NO | 详情 | 详情 |
| (IV) | 55765 | (2R)-N-methoxy-N,2-dimethylcyclopropanecarboxamide | C7H13NO2 | 详情 | 详情 | |
| (V) | 52517 | 5-Bromo-1,3-dimethylbenzene; 5-Bromo-m-xylene; 1-Bromo-3,5-dimethylbenzene; 3,5-Dimethylbromobenzene | 556-96-7 | C8H9Br | 详情 | 详情 |
| (VI) | 55766 | (3,5-dimethylphenyl)[(2R)-2-methylcyclopropyl]methanone | C13H16O | 详情 | 详情 | |
| (VII) | 52523 | ethyl 2-(4-hydrazinophenyl)-2-methylpropanoate | C12H18N2O2 | 详情 | 详情 | |
| (VIII) | 52525 | ethyl 2-[3-(2-amino-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate | C25H32N2O2 | 详情 | 详情 | |
| (IX) | 52531 | 2,4-dinitrobenzenesulfonyl chloride | C6H3ClN2O6S | 详情 | 详情 | |
| (X) | 55767 | ethyl 2-[2-(3,5-dimethylphenyl)-3-((1S)-2-{[(2,4-dinitrophenyl)sulfonyl]amino}-1-methylethyl)-1H-indol-5-yl]-2-methylpropanoate | C31H34N4O8S | 详情 | 详情 | |
| (XI) | 55768 | 2-(1H-1,2,3-benzotriazol-5-yl)-1-ethanol | C8H9N3O | 详情 | 详情 | |
| (XII) | 55769 | ethyl 2-[3-((1S)-2-{[2-(1H-1,2,3-benzotriazol-5-yl)ethyl]amino}-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoate | C33H39N5O2 | 详情 | 详情 | |
| (XIII) | 55770 | 2-[3-((1S)-2-{[2-(1H-1,2,3-benzotriazol-5-yl)ethyl]amino}-1-methylethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-2-methylpropanoic acid | C31H35N5O2 | 详情 | 详情 |