Dimethyl Sulfoxide → 3-(Bis(tert-butoxycarbonyl)amino)-6-(2,2,2-trifluoro-ethoxy)-pyrazine-2-carboxylic acid methyl ester

HRID 2368394노트

반응식

HRID 2368394 반응식
[C:1]([O:5][C:6]([N:8]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[C:9]1[C:10]([C:16]([O:18][CH3:19])=[O:17])=[N:11][C:12](Br)=[CH:13][N:14]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:27][C:28]([F:32])([F:31])[CH2:29][OH:30].C(=O)([O-])[O-].[Cs+].[Cs+].CS(C)=O>C(OCC)(=O)C>[CH3:19][O:18][C:16]([C:10]1[C:9]([N:8]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])=[N:14][CH:13]=[C:12]([O:30][CH2:29][C:28]([F:32])([F:31])[F:27])[N:11]=1)=[O:17]

참가 물질

6

반응물 4

HCID 679Dimethyl SulfoxideHCID 64092,2,2-TrifluoroethanolHCID 10796Cesium carbonateHCID 86660188Methyl 3-(bis(tert-butoxycarbonyl)amino)-6-bromopyrazine-2-carboxylate

생성물 1

HCID 700980663-(Bis(tert-butoxycarbonyl)amino)-6-(2,2,2-trifluoro-ethoxy)-pyrazine-2-carboxylic acid methyl ester

시약·촉매·용매 1

HCID 8857Ethyl Acetate용매

실험 절차

A suspension of methyl 3-(bis(tert-butoxycarbonyl)amino)-6-bromopyrazine-2-carboxylate (500 mg, 1.16 mmol), 2,2,2-trifluoroethanol (84 μl, 1.16 mmol), cesium carbonate (415 mg, 1.27 mmol) and dry DMSO (5 ml) was stirred at r.t. for 3 h. The reaction mixture was poured into ethyl acetate (100 ml) and extracted with saturated sodium bicarbonate (aqueous solution). The organic layer was washed with water and brine and the aqueous layers were back-extracted with ethyl acetate. The combined organic layers were dried, evaporated and the product was obtained after purification by silica gel chromatography using a heptane/ethyl acetate gradient as white solid (456 mg, 87%).

후처리

  1. extractionextracted with saturated sodium bicarbonate (aqueous solution)
  2. washThe organic layer was washed with water and brine
  3. extractionthe aqueous layers were back-extracted with ethyl acetate
  4. customThe combined organic layers were dried
  5. customevaporated
  6. customthe product was obtained
  7. customafter purification by silica gel chromatography

출처 및 근거

ORD 기록
ord-6a6b1baad731490cbfd9df1e2e91bfe3
출처 데이터셋
uspto-grants-2014_04
특허 번호
US08703768B2

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