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【结 构 式】 
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【分子编号】28523 【品名】(2S)-2-amino-3-phenyl-1-propanol; L-phenylalanilol; (S)-2-amino-3-phenyl-1-propanol 【CA登记号】5267-64-1 |
【 分 子 式 】C9H13NO 【 分 子 量 】151.20836 【元素组成】C 71.49% H 8.67% N 9.26% O 10.58% |
合成路线1
该中间体在本合成路线中的序号：(XVII)An alternative procedure for the preparation of the intermediate urea (IX) has been reported. Alkylation of L-phenylalanine (XIV) with benzyl bromide provided the N,N-dibenzyl amine (XV), which was reduced to amino alcohol (XVI) using DIBAL in cold toluene. In an improved large-scale process, amino alcohol (XVI) was prepared by benzylation of L-phenylalaninol (XVII). Swern oxidation of the alcohol function of (XVI) afforded aldehyde (XVIII). Subsequent reaction of (XVIII) with chloromethyllithium at low temperature furnished the desired epoxide (XX) along with minor amounts of its diastereoisomer (XIX). Opening of this mixture with isobutyl amine (V) gave diamino alcohol (XXIa-b). After coupling of (XXIa-b) with tert-butyl isocyanate (VII) to produce the corresponding ureas (XXIIa-b) [the required isomer (XXIIb) was isolated by recrystallization]. Removal of the benzyl protecting groups of (XXIIb) then yielded the target intermediate (IX).
| 【1】 Talley, J.J.; Getman, D.P.; DeCrescenzo, G.A.; Lin, K.-O.; Vazquez, M.L.; Mueller, R.A.; Reed, K.L.; Heintz, R.M.; Clare, M.; Freskos, J.N.; Sun, E.T. (Pharmacia Corp.); Urea-containing hydroxyethylamine cpds. as retroviral protease inhibitors. JP 1995508041; WO 9323368 . |
| 【2】 Liu, C.; et al.; Development of large-scale process for an HIV protease inhibitor. Org Process Res Dev 1997, 1, 1, 45. |
| 【3】 Getman, D.P.; et al.; Discovery of a novel class of potent HIV-1 protease inhibitors containing the (R)-(hydroxyethyl)urea isostere. J Med Chem 1993, 36, 2, 288. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 12912 | 1-(Bromomethyl)benzene; Alpha-bromotoluene | 100-39-0 | C7H7Br | 详情 | 详情 | |
| (XXIa) | 37939 | (2S,3S)-3-(dibenzylamino)-1-(isobutylamino)-4-phenyl-2-butanol | C28H36N2O | 详情 | 详情 | |
| (XXIb) | 37940 | (2R,3S)-3-(dibenzylamino)-1-(isobutylamino)-4-phenyl-2-butanol | C28H36N2O | 详情 | 详情 | |
| (XXIIa) | 37941 | N'-(tert-butyl)-N-[(2S,3S)-3-(dibenzylamino)-2-hydroxy-4-phenylbutyl]-N-isobutylurea | C33H45N3O2 | 详情 | 详情 | |
| (XXIIb) | 37942 | N'-(tert-butyl)-N-[(2R,3S)-3-(dibenzylamino)-2-hydroxy-4-phenylbutyl]-N-isobutylurea | C33H45N3O2 | 详情 | 详情 | |
| (V) | 13306 | 2-Methyl-1-propanamine; Isobutylamine | 78-81-9 | C4H11N | 详情 | 详情 |
| (VII) | 16976 | tert-butylisocyanate; tert-butyl isocyanate; 2-isocyanato-2-methylpropane | 1609-86-5 | C5H9NO | 详情 | 详情 |
| (IX) | 37931 | N-[(2R,3S)-3-amino-2-hydroxy-4-phenylbutyl]-N'-(tert-butyl)-N-isobutylurea | C19H33N3O2 | 详情 | 详情 | |
| (XIV) | 13952 | (S)-(-)-Phenylalanine; L-Phenylalanine | 63-91-2 | C9H11NO2 | 详情 | 详情 |
| (XV) | 37935 | (2S)-2-(dibenzylamino)-3-phenylpropionic acid | C23H23NO2 | 详情 | 详情 | |
| (XVI) | 30457 | (2S)-2-(dibenzylamino)-3-phenyl-1-propanol | 111060-52-7 | C23H25NO | 详情 | 详情 |
| (XVII) | 28523 | (2S)-2-amino-3-phenyl-1-propanol; L-phenylalanilol; (S)-2-amino-3-phenyl-1-propanol | 5267-64-1 | C9H13NO | 详情 | 详情 |
| (XVIII) | 37936 | (2S)-2-(dibenzylamino)-3-phenylpropanal | C23H23NO | 详情 | 详情 | |
| (XIX) | 37937 | N,N-dibenzyl-N-[(1S)-1-[(2R)oxiranyl]-2-phenylethyl]amine; (1S)-N,N-dibenzyl-1-[(2R)oxiranyl]-2-phenyl-1-ethanamine | C24H25NO | 详情 | 详情 | |
| (XX) | 37938 | N,N-dibenzyl-N-[(1S)-1-[(2S)oxiranyl]-2-phenylethyl]amine; (1S)-N,N-dibenzyl-1-[(2S)oxiranyl]-2-phenyl-1-ethanamine | C24H25NO | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(VIII)Coupling of N-Boc-p-nitrophenylalanine (I) with 4-(2-fluoroethyl)piperidine (II) by means of 2-benzotriazolyl-1,1,3,3-tetramethyluronium tetrafluoborate (TBTU) gave amide (III) which, after acidic deprotection provided aminoamide (IV). 4-Chloropyridine-3-sulfonyl chloride (VI), generated from 4-hydroxy pyridine-3-sulfonic acid (V) by chlorination with PCl5/POCl3, was coupled with amine (IV) to afford sulfonamide (VII). Further condensation of (VII) with L-phenylalaninol (VIII) produced aminopyridine (IX). Conversion of the alcohol group of (IX) to the corresponding mesylate, followed by displacement with morpholine furnished the N-substituted morpholine (X). The nitro group of (X) was finally reduced to the target aniline by hydrogenation over Pd/C.
| 【1】 Ambler, J.; Baker E; Brown, L.; Butler, P.; Farr, D.; Dunnet, K.; Le Grand, D.; Janus, D.; Jones, D.; Menear, K.; Mercer, M.; Smith, G.; Talbot, M.; Tweed, M.; The discovery of orally available thrombin inhibitors: Studies towards the optimisation of CGH1668. Bioorg Med Chem Lett 1998, 8, 24, 3583. |
| 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) | 28516 | (2S)-2-[(tert-butoxycarbonyl)amino]-3-(4-nitrophenyl)propionic acid | C14H18N2O6 | 详情 | 详情 | |
| (II) | 28517 | 4-(2-fluoroethyl)piperidine | C7H14FN | 详情 | 详情 | |
| (III) | 28518 | tert-butyl (1S)-2-[4-(2-fluoroethyl)-1-piperidinyl]-1-(4-nitrobenzyl)-2-oxoethylcarbamate | C21H30FN3O5 | 详情 | 详情 | |
| (IV) | 28519 | (2S)-2-amino-1-[4-(2-fluoroethyl)-1-piperidinyl]-3-(4-nitrophenyl)-1-propanone | C16H22FN3O3 | 详情 | 详情 | |
| (V) | 28520 | 4-hydroxy-3-pyridinesulfonic acid | C5H5NO4S | 详情 | 详情 | |
| (VI) | 28521 | 4-chloro-3-pyridinesulfonyl chloride | C5H3Cl2NO2S | 详情 | 详情 | |
| (VII) | 28522 | 4-chloro-N-[(1S)-2-[4-(2-fluoroethyl)-1-piperidinyl]-1-(4-nitrobenzyl)-2-oxoethyl]-3-pyridinesulfonamide | C21H24ClFN4O5S | 详情 | 详情 | |
| (VIII) | 28523 | (2S)-2-amino-3-phenyl-1-propanol; L-phenylalanilol; (S)-2-amino-3-phenyl-1-propanol | 5267-64-1 | C9H13NO | 详情 | 详情 |
| (IX) | 28524 | 4-[[(1S)-1-benzyl-2-hydroxyethyl]amino]-N-[(1S)-2-[4-(2-fluoroethyl)-1-piperidinyl]-1-(4-nitrobenzyl)-2-oxoethyl]-3-pyridinesulfonamide | C30H36FN5O6S | 详情 | 详情 | |
| (X) | 28525 | 4-[[(1S)-1-benzyl-2-(4-morpholinyl)ethyl]amino]-N-[(1S)-2-[4-(2-fluoroethyl)-1-piperidinyl]-1-(4-nitrobenzyl)-2-oxoethyl]-3-pyridinesulfonamide | C34H43FN6O6S | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(VIII)L-DOPA (I) was esterified by means of MeOH and SOCl2, and the resulting aminoester (II) was protected with benzyloxycarbonyloxy succinimide to give carbamate (III). Further reaction of (III) with 1,2-dibromoethane produced the cyclic diether derivative (IV). Chlorsulfonylation of (IV), followed by basic treatment with DMAP and Et3N gave rise to the benzothiazine (V). After N-alkylation of (V) with iodoethane and K2CO3, basic hydrolysis of the resulting methyl ester (VI) provided carboxylic acid (VII). This was coupled to L-phenylalaninol (VIII) using benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (BOP) and 1-hydroxybenzotriazole (HOBt) to afford the corresponding amide as a diastereomeric mixture, which was separated by flash chromatography. The required (S,S)-diastereoisomer (IX) was then oxidized to the title aldehyde using Dess-Martin periodinane reagent.
| 【1】 Wells, G.J.; et al.; 1,2-Benzothiazine 1,1-dioxide P2-P3 peptide mimetic aldehyde calpain I inhibitors. J Med Chem 2001, 44, 21, 3488. |
| 【2】 Bihovsky, R.; Wells, G.J.; Tao, M. (Cephalon, Inc.); Benzothiazo and related heterocyclic group-containing cysteine and serine protease. WO 9821186 . |
| 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) | 15272 | (2S)-2-amino-3-(3,4-dihydroxyphenyl)propionic acid; 3-hydroxy-L-tyrosine; Levodopa | 59-92-7 | C9H11NO4 | 详情 | 详情 |
| (II) | 29568 | methyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)propanoate | C10H13NO4 | 详情 | 详情 | |
| (III) | 29569 | methyl (2S)-2-[[(benzyloxy)carbonyl]amino]-3-(3,4-dihydroxyphenyl)propanoate | C18H19NO6 | 详情 | 详情 | |
| (IV) | 29570 | methyl (2S)-2-[[(benzyloxy)carbonyl]amino]-3-(2,3-dihydro-1,4-benzodioxin-6-yl)propanoate | C20H21NO6 | 详情 | 详情 | |
| (V) | 29571 | methyl 1,1-dioxo-1,2,3,4,7,8-hexahydro-2H-[1,4]dioxino[2,3-g][1,2]benzothiazine-3-carboxylate | C12H13NO6S | 详情 | 详情 | |
| (VI) | 29572 | methyl 2-ethyl-1,1-dioxo-1,2,3,4,7,8-hexahydro-2H-[1,4]dioxino[2,3-g][1,2]benzothiazine-3-carboxylate | C14H17NO6S | 详情 | 详情 | |
| (VII) | 29573 | 2-ethyl-1,1-dioxo-1,2,3,4,7,8-hexahydro-2H-[1,4]dioxino[2,3-g][1,2]benzothiazine-3-carboxylic acid | C13H15NO6S | 详情 | 详情 | |
| (VIII) | 28523 | (2S)-2-amino-3-phenyl-1-propanol; L-phenylalanilol; (S)-2-amino-3-phenyl-1-propanol | 5267-64-1 | C9H13NO | 详情 | 详情 |
| (IX) | 29574 | (3S)-N-[(1S)-1-benzyl-2-hydroxyethyl]-2-ethyl-1,1-dioxo-1,2,3,4,7,8-hexahydro-2H-[1,4]dioxino[2,3-g][1,2]benzothiazine-3-carboxamide | C22H26N2O6S | 详情 | 详情 | |
| (X) | 18845 | Dess-Martin periodinane; 1,1,1-Triacetoxy-1,2-benziodoxol-3(1H)-one | 87413-09-0 | C13H13IO8 | 详情 | 详情 |