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【结 构 式】

【分子编号】16017

【品名】2-[(1R)-1-([[(1S)-1-benzyl-2-(methylamino)-2-oxoethyl]amino]carbonyl)-3-methylbutyl]malonic acid

【CA登记号】

【 分 子 式 】C19H26N2O6

【 分 子 量 】378.42532

【元素组成】C 60.3% H 6.93% N 7.4% O 25.37%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(VIII)

The treatment of D-leucine (I) with NaNO2, H2SO4 and NaBr gives 2(R)-bromo-5-methylpentanoic acid (II), which is esterified with isobutene and H2SO4 to the corresponding tert-butyl ester (III). The condensation of (III) with dibenzyl malonate (IV) by means of potassium tert-butoxide in DMF yields the malonyl derivative (V), which is treated with trifluoroacetic acid to hydrolyze the tert-butyl ester, and without isolation is condensed with L-phenylalanine methyl amide (VI) by means of hydroxybenzotriazole (HOBT) and dicyclohexylcarbodiimide (DCC), affording 4-benzyloxy-3-(benzyloxycarbonyl)-2(R)-isobutylsuccinyl-L-phenylalanine methylamide (VII). The elimination of the benzyl groups of (VII) by hydrogenolysis over Pd/C in ethanol gives the dicarboxylic acid (VIII), which by partial decarboxylation and reaction with aqueous formaldehyde and piperidine yields 4-hydroxy-2(R)-isobutyl-3-methylenesuccinyl-L-phenylalanine methylamide (IX). The addition of thiophene-2-thiol (X) to the double bond of (IX) affords 4-hydroxy-2(R)-isobutyl-3(S)-(2-thienylsulfanylmethyl)succinyl-L-phenylalanine methylamide (XI), which is finally treated with hydroxylamine and hydroxybenzotriazole in dichloromethane/DMF.

1 Ngo, J.; Graul, A.; Castaner, J.; Batimastat. Drugs Fut 1996, 21, 12, 1215.
2 Campion, C.; Davidson, A.H.; Dickens, J.P.; Crimmin, M.J. (British Biotech plc); Hydroxamic acid based collagenase inhibitors. US 5240958; US 5310763; WO 9005719 .
3 Beckett, R.P.; Crimmin, M.J.; Galloway, W.A.; Matrix metalloproteinase inhibitors in the treatment of rheumatoid arthritis and cancer. 205th ACS Natl Meet (March 28-April 2, Denver) 1993, Abst MEDI 147.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
15926 2-methyl-1-propene; isobutylene 115-11-7 C4H8 详情 详情
(I) 16010 D-leucine 328-38-1 C6H13NO2 详情 详情
(II) 16011 (2R)-2-bromo-4-methylpentanoic acid C6H11BrO2 详情 详情
(III) 16012 tert-butyl (2R)-2-bromo-4-methylpentanoate C10H19BrO2 详情 详情
(IV) 16013 dibenzyl malonate 15014-25-2 C17H16O4 详情 详情
(V) 16014 1,1-dibenzyl 2-(tert-butyl) (2R)-4-methyl-1,1,2-pentanetricarboxylate C27H34O6 详情 详情
(VI) 16015 (2S)-2-amino-N-methyl-3-phenylpropanamide C10H14N2O 详情 详情
(VII) 16016 dibenzyl 2-[(1R)-1-([[(1S)-1-benzyl-2-(methylamino)-2-oxoethyl]amino]carbonyl)-3-methylbutyl]malonate C33H38N2O6 详情 详情
(VIII) 16017 2-[(1R)-1-([[(1S)-1-benzyl-2-(methylamino)-2-oxoethyl]amino]carbonyl)-3-methylbutyl]malonic acid C19H26N2O6 详情 详情
(IX) 16018 2-[(1R)-1-([[(1S)-1-benzyl-2-(methylamino)-2-oxoethyl]amino]carbonyl)-3-methylbutyl]acrylic acid C19H26N2O4 详情 详情
(X) 16019 2-Thienylhydrosulfide; 2-Thiophenethiol 7774-74-5 C4H4S2 详情 详情
(XI) 16020 (2S,3R)-3-([[(1S)-1-benzyl-2-(methylamino)-2-oxoethyl]amino]carbonyl)-5-methyl-2-[(2-thienylsulfanyl)methyl]hexanoic acid C23H30N2O4S2 详情 详情
Extended Information