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【结 构 式】 
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【分子编号】20408 【品名】3-[[(tert-butoxycarbonyl)amino]methyl]benzoic acid 【CA登记号】 |
【 分 子 式 】C13H17NO4 【 分 子 量 】251.28232 【元素组成】C 62.14% H 6.82% N 5.57% O 25.47% |
合成路线1
该中间体在本合成路线中的序号：(III)The chiral intermediate (X) was synthesized from 3-cyanobenzoic acid (I) through the following sequence. Hydrogenation of the cyano group over Raney-nickel provided 3-(aminomethyl)benzoic acid (II), which was protected as the tert-buyl carbamate (III) with Boc2O. Subsequent hydrogenation of the benzene ring of (III) over PtO2 yielded the racemic amino acid (IV), predominantly as the cis isomer. The chiral resolution of (IV) with (S)-a-methylbenzyl amine (V) in EtOAc provided the optically pure 1(R),3(S) compound (VI), which was then reduced with borane in THF. The resulting aminoalcohol (VII), after conversion to mesylate (VIII) with methanesulfonyl chloride, was treated with NaN3 to give azide (IX), and this was then reduced to amine (X) with H2 over Pd/C.
| 【1】 Yang, L.; et al.; Spiro[1H-indene-1,4'-piperidine] derivatives as potent and selective non-peptide human somatostatin receptor subtype 2 (sst2) agonists. J Med Chem 1998, 41, 13, 2175. |
| 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) | 20406 | 3-cyanobenzoic acid | 1877-72-1 | C8H5NO2 | 详情 | 详情 |
| (II) | 20407 | 3-(aminomethyl)benzoic acid | C8H9NO2 | 详情 | 详情 | |
| (III) | 20408 | 3-[[(tert-butoxycarbonyl)amino]methyl]benzoic acid | C13H17NO4 | 详情 | 详情 | |
| (IV) | 20409 | 3-[[(tert-butoxycarbonyl)amino]methyl]cyclohexanecarboxylic acid | C13H23NO4 | 详情 | 详情 | |
| (V) | 20042 | (1S)-1-phenyl-1-ethanamine; (1S)-1-phenylethylamine | C8H11N | 详情 | 详情 | |
| (VI) | 20411 | (1R,3S)-3-(Tert-butoxycarbonylamino)cyclohexanecarboxylic acid (S)-1-phenylethylamine salt | C21H34N2O4 | 详情 | 详情 | |
| (VII) | 20412 | tert-butyl [(1S,3R)-3-(hydroxymethyl)cyclohexyl]methylcarbamate | C13H25NO3 | 详情 | 详情 | |
| (VIII) | 20413 | ((1R,3S)-3-[[(tert-butoxycarbonyl)amino]methyl]cyclohexyl)methyl methanesulfonate | C14H27NO5S | 详情 | 详情 | |
| (IX) | 20414 | tert-butyl [(1S,3R)-3-(azidomethyl)cyclohexyl]methylcarbamate | C13H24N4O2 | 详情 | 详情 | |
| (X) | 20415 | tert-butyl [(1S,3R)-3-(aminomethyl)cyclohexyl]methylcarbamate | C13H26N2O2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(III)Synthesis of intermediate (VIII): Hydrogenation of m-cyanobenzoic acid (I) with H2 over Raney-Ni in ammonia gives amine (II), which is treated with Boc2O and NaOH in dioxane to provide protected amine (III). Reduction of (III) by means of PtO2 and H2 in acetic acid yields a 10:1 mixture of cis/trans ciclohexane derivatives (rac)-(IV)/(rac)-(V). The racemic cis compound obtained is enantiomerically resolved and stereomer (V) is then reduced with BH3.Me2S in THF providing alcohol (VI), which is converted into azide (VII) after treatment with NaN3 in DMF of the mesylate derivative obtained by treatment of (VI) with Et3N, DMAP and MsCl. Finally amino derivative (VIII) is obtained by hydrogenation of azide (VII) over Pd/C in MeOH. Synthesis of intermediate (XII): beta-Methyl-D-tryptophan methyl ester (IX) reacts with piperidine derivative (X) in presence of DSC and DIEA in CH2Cl2 to afford (XI), whose methyl ester is hydrolyzed in THF with LiOH in EtOH/H2O. Synthesis EN 269873: Finally intermediate (XII) is coupled with (VIII) with EDC and HOBt, and the Boc group is removed with TFA in CH2Cl2 to yield the desired product.
| 【1】 Patchett, A.A.; Yang, L.; Pasternak, A.; Berk, S. (Merck & Co., Inc.); Somatostatin agonists. EP 1023061; US 6057338; WO 9844921 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (rac)-(IV) | 41637 | (rac)-(1S*,3S*)-3-[[(tert-butoxycarbonyl)amino]methyl]cyclohexanecarboxylic acid | C13H23NO4 | 详情 | 详情 | |
| (rac)-(V) | 41638 | (rac)-(1S*,3R*)-3-[[(tert-butoxycarbonyl)amino]methyl]cyclohexanecarboxylic acid | C13H23NO4 | 详情 | 详情 | |
| (I) | 20406 | 3-cyanobenzoic acid | 1877-72-1 | C8H5NO2 | 详情 | 详情 |
| (II) | 20407 | 3-(aminomethyl)benzoic acid | C8H9NO2 | 详情 | 详情 | |
| (III) | 20408 | 3-[[(tert-butoxycarbonyl)amino]methyl]benzoic acid | C13H17NO4 | 详情 | 详情 | |
| (V) | 41639 | (1S,3R)-3-[[(tert-butoxycarbonyl)amino]methyl]cyclohexanecarboxylic acid | C13H23NO4 | 详情 | 详情 | |
| (VI) | 20412 | tert-butyl [(1S,3R)-3-(hydroxymethyl)cyclohexyl]methylcarbamate | C13H25NO3 | 详情 | 详情 | |
| (VII) | 20414 | tert-butyl [(1S,3R)-3-(azidomethyl)cyclohexyl]methylcarbamate | C13H24N4O2 | 详情 | 详情 | |
| (VIII) | 20415 | tert-butyl [(1S,3R)-3-(aminomethyl)cyclohexyl]methylcarbamate | C13H26N2O2 | 详情 | 详情 | |
| (IX) | 29274 | methyl (2R,3S)-2-amino-3-(1H-indol-3-yl)butanoate | C13H16N2O2 | 详情 | 详情 | |
| (X) | 12138 | 1-(4-Piperidinyl)-1,3-dihydro-2H-benzimidazol-2-one; 4-(2-Keto-1-benzimidazolinyl)piperidine | 20662-53-7 | C12H15N3O | 详情 | 详情 |
| (XI) | 29401 | methyl (2R,3S)-3-(1H-indol-3-yl)-2-([[4-(2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-piperidinyl]carbonyl]amino)butanoate | C26H29N5O4 | 详情 | 详情 | |
| (XII) | 29402 | (2R,3S)-3-(1H-indol-3-yl)-2-([[4-(2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-piperidinyl]carbonyl]amino)butyric acid | C25H27N5O4 | 详情 | 详情 |