Sodium hydride → (R)-2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl 4-(4-trifluoromethylphenylamino)piperidine-1-carboxylate

HRID 856206노트

반응식

HRID 856206 반응식
[F:1][C:2]([F:34])([F:33])[C:3]1[CH:8]=[CH:7][C:6]([NH:9][CH:10]2[CH2:15][CH2:14][N:13]([C:16]([O:18][CH2:19][C@@:20]([OH:32])([CH3:31])[CH2:21][N:22]3[CH:26]=[C:25]([N+:27]([O-:29])=[O:28])[N:24]=[C:23]3Cl)=[O:17])[CH2:12][CH2:11]2)=[CH:5][CH:4]=1.[H-].[Na+]>CN(C=O)C>[F:1][C:2]([F:34])([F:33])[C:3]1[CH:8]=[CH:7][C:6]([NH:9][CH:10]2[CH2:15][CH2:14][N:13]([C:16]([O:18][CH2:19][C@:20]3([CH3:31])[O:32][C:23]4=[N:24][C:25]([N+:27]([O-:29])=[O:28])=[CH:26][N:22]4[CH2:21]3)=[O:17])[CH2:12][CH2:11]2)=[CH:5][CH:4]=1

참가 물질

4

반응물 2

HCID 24758Sodium hydrideHCID 69479082(R)-3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl 4-(4-trifluoromethylphenylamino)piperidine-1-carboxylate

생성물 1

HCID 69481331(R)-2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl 4-(4-trifluoromethylphenylamino)piperidine-1-carboxylate수율 31.4%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

실험 절차

To the solution of (R)-3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl 4-(4-trifluoromethylphenylamino)piperidine-1-carboxylate prepared in Example 105 (1.44 g, 2.85 mmol) in DMF (10 ml), sodium hydride (0.14 g, 3.42 mmol) was added followed by stirring for 1 hour with cooling on ice-bath. To the reaction mixture, ice-water was added, and the solution was extracted with ethyl acetate. The organic phase was washed with water, dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate) and recrystallized from acetonitrile-isopropanol to afford (R)-2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl 4-(4-trifluoromethylphenylamino)piperidine-1-carboxylate (0.42 g, yield 31%) as a white solid.

후처리

  1. temperaturewith cooling on ice-bath
  2. extractionthe solution was extracted with ethyl acetate
  3. washThe organic phase was washed with water
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (ethyl acetate)
  7. customrecrystallized from acetonitrile-isopropanol

출처 및 근거

ORD 기록
ord-d2a584e0e21b4c779f76cd16dcaee767
출처 데이터셋
uspto-grants-2007_08
특허 번호
US07262212B2

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