Sodium hydride → 5-[3-(4-fluoro-phenyl)-5-methyl-3H-[1,2,3]triazol-4-ylmethoxy]-pyrazine-2-carboxylic acid methyl ester

HRID 402455노트

반응식

HRID 402455 반응식
[H-].[Na+].[F:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[C:14]([CH2:15][OH:16])=[C:13]([CH3:17])[N:12]=[N:11]2)=[CH:6][CH:5]=1.Cl[C:19]1[N:20]=[CH:21][C:22]([C:25]([O:27][CH3:28])=[O:26])=[N:23][CH:24]=1>C1COCC1>[CH3:28][O:27][C:25]([C:22]1[CH:21]=[N:20][C:19]([O:16][CH2:15][C:14]2[N:10]([C:7]3[CH:6]=[CH:5][C:4]([F:3])=[CH:9][CH:8]=3)[N:11]=[N:12][C:13]=2[CH3:17])=[CH:24][N:23]=1)=[O:26]

참가 물질

5

반응물 3

HCID 24758Sodium hydrideHCID 406081Methyl 5-chloropyrazine-2-carboxylateHCID 19914681(1-(4-Fluorophenyl)-4-methyl-1H-1,2,3-triazol-5-yl)methanol

생성물 1

HCID 674980315-[3-(4-fluoro-phenyl)-5-methyl-3H-[1,2,3]triazol-4-ylmethoxy]-pyrazine-2-carboxylic acid methyl ester수율 95.5%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매3회

실험 절차

To a suspension of NaH (55% in oil, 116 mg, 2.7 mmol) in THF (4 mL) was added a solution of [3-(4-fluoro-phenyl)-5-methyl-3H-[1,2,3]triazol-4-yl]-methanol (500 mg, 2.4 mmol) in THF (6 mL) dropwise at 0° C. and the reaction mixture was stirred at room temperature for 30 min. Then a solution of methyl 5-chloropyrazine-2-carboxylate (460 mg, 2.65 mmol) in THF (6 mL) was added dropwise at 0° C. and the reaction mixture was stirred at room temperature for 16 h. The mixture was then poured into ice water and extracted with ethyl acetate and the combined organic extracts washed with brine, dried over sodium sulphate, filtered and evaporated. Purification by chromatography (silica, 0 to 50% ethyl acetate in heptane, then 0 to 5% methanol in dichloromethane) afforded the title compound (787 mg, 95%) as a white solid. MS: m/e=344.3 [M+H]+.

후처리

  1. stirringthe reaction mixture was stirred at room temperature for 16 h
  2. extractionextracted with ethyl acetate
  3. washthe combined organic extracts washed with brine
  4. dry with materialdried over sodium sulphate
  5. filtrationfiltered
  6. customevaporated
  7. customPurification by chromatography (silica, 0 to 50% ethyl acetate in heptane

출처 및 근거

ORD 기록
ord-62649dc7dc214670af9879626b0ba618
출처 데이터셋
uspto-grants-2014_06
특허 번호
US08742097B2

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