• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【分子编号】28231

【品名】benzyl 2-[1-(ethoxycarbonyl)-2-methylpropyl]-3-[(2,2,2-trifluoroacetyl)amino]-1-pyrrolidinecarboxylate

【CA登记号】

【 分 子 式 】C21H27F3N2O5

【 分 子 量 】444.4510696

【元素组成】C 56.75% H 6.12% F 12.82% N 6.3% O 18%

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:(IX)

Synthesis of intermediate (XI) of Scheme 25142902e: Racemic 2,4-diaminobutyric acid (I) was esterified in MeOH in the presence of SOCl2. The resulting methyl ester (II) was cyclized using Dowex 2x8-400 resin to give 3-amino-2-pyrrolidinone (III), which was converted to the trifluoroacetamide (IV) using methyl trifluoroacetate in MeOH. The lactam nitrogen of (IV) was then protected with benzyl chloroformate and lithium hexamethyldisilazide yielding (V). Reduction of (V) with NaBH4, followed by treatment with ethanolic H2SO4 provided ethoxypyrrolidine (VI). Ethyl isovalerate (VII) was converted to the silyl enolate (VIII) employing lithium hexamethyldisilazide and silyl triflate. Coupling of (VIII) with ethoxypyrrolidine (VI) in the presence of BF3-Et2O provided (IX). After hydrolysis of the trifluoroacetamide group of (IX) with K2CO3 yielding (X), its cyclization by means of tert-butylmagnesium chloride yielded the pyrrolopyrrolone system. Separation of the required (3aS, 6aR)-isomer (XI) was achieved by chiral HPLC.

1 Dowle, M.D.; Finch, H.; Harrison, L.A.; Inglis, G.G.A.; Johnson, M.R.; Macdonald, S.J.F.; Shah, P.; Smith, R.A. (Glaxo Wellcome plc); Pyrrolopyrrolone derivs. as inhibitors of neutrophil elastase. EP 0891362; JP 2000507950; US 5994344; WO 9736903 .
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) 28222 2,4-diaminobutyric acid 1883-09-6 C4H10N2O2 详情 详情
(II) 28223 methyl 2,4-diaminobutanoate C5H12N2O2 详情 详情
(III) 28224 3-amino-2-pyrrolidinone C4H8N2O 详情 详情
(IV) 28225 2,2,2-trifluoro-N-(2-oxo-3-pyrrolidinyl)acetamide C6H7F3N2O2 详情 详情
(V) 28229 benzyl 2-oxo-3-[(2,2,2-trifluoroacetyl)amino]-1-pyrrolidinecarboxylate C14H13F3N2O4 详情 详情
(VI) 28230 benzyl 2-ethoxy-3-[(2,2,2-trifluoroacetyl)amino]-1-pyrrolidinecarboxylate C16H19F3N2O4 详情 详情
(VII) 28226 ethyl 3-methylbutanoate 108-64-5 C7H14O2 详情 详情
(VIII) 28227 (Z)-1-ethoxy-3-methyl-1-butenyl triisopropylsilyl ether C16H34O2Si 详情 详情
(IX) 28231 benzyl 2-[1-(ethoxycarbonyl)-2-methylpropyl]-3-[(2,2,2-trifluoroacetyl)amino]-1-pyrrolidinecarboxylate C21H27F3N2O5 详情 详情
(X) 28232 benzyl 3-amino-2-[1-(ethoxycarbonyl)-2-methylpropyl]-1-pyrrolidinecarboxylate C19H28N2O4 详情 详情
(XI) 28228 benzyl (3aR,6S,6aS)-6-isopropyl-5-oxohexahydropyrrolo[3,2-b]pyrrole-1(2H)-carboxylate C17H22N2O3 详情 详情
Extended Information