Epichlorohydrin → 2-[1-oxiranylmethyl-3-(4-trifluoromethyl-phenyl)-1H-pyrazol-4-yl]-pyrazine

HRID 967411ノート

反応式

HRID 967411 の反応式
[F:1][C:2]([F:21])([F:20])[C:3]1[CH:8]=[CH:7][C:6]([C:9]2[C:13]([C:14]3[CH:19]=[N:18][CH:17]=[CH:16][N:15]=3)=[CH:12][NH:11][N:10]=2)=[CH:5][CH:4]=1.[CH2:22]([CH:24]1[O:26][CH2:25]1)Cl.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C.CCOC(C)=O>[O:26]1[CH2:25][CH:24]1[CH2:22][N:11]1[CH:12]=[C:13]([C:14]2[CH:19]=[N:18][CH:17]=[CH:16][N:15]=2)[C:9]([C:6]2[CH:7]=[CH:8][C:3]([C:2]([F:20])([F:1])[F:21])=[CH:4][CH:5]=2)=[N:10]1

参加物

6

反応物 3

HCID 7835EpichlorohydrinHCID 10796Cesium carbonateHCID 178506123HCID 178506123、化合物

生成物 1

HCID 222936232-[1-oxiranylmethyl-3-(4-trifluoromethyl-phenyl)-1H-pyrazol-4-yl]-pyrazine収率 59%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒

実験手順

To a solution of 2-[3-(4-trifluoromethyl-phenyl)-1H-pyrazol-4-yl]-pyrazine (200 mg, 0.69 mmol) and epichlorohydrin (0.540 mL, 6.9 mmol) in DMF (2 mL) was added cesium carbonate (450 mg, 1.38 mmol). The reaction mixture was allowed to stir for 24 h, diluted with EtOAc, and washed with saturated NaHCO3, water, and brine. The organic layer was dried over Na2SO4, concentrated and purified by column chromatography (silica, 5% acetone/CH2Cl2) to afford 2-[1-oxiranylmethyl-3-(4-trifluoromethyl-phenyl)-1H-pyrazol-4-yl]-pyrazine (141 mg, 59%). TLC (silica, 20% acetone/CH2Cl2): Rf=0.38. MS (electrospray) m/z 347.1 (347.1, calculated for C17H13F3N4O, M++H). 1H NMR (400 MHz, CDCl3): 8.51 (dd, J=2.8, 1.8 Hz, 1H), 8.45 (d, J=1.5 Hz, 1H), 8.38 (d, J=12.8 Hz, 1H), 8.01 (s, 1H), 7.66 (d, J=8.6 Hz, 1H), 7.62 (d, J=8.6 Hz, 1H), 4.57 (dd, J=14.7, 3.1 Hz, 1H), 4.21 (dd, J=14.7, 6.1 Hz, 1H), 3.44 (m, 1H), 2.91 (t, J=4.5 Hz, 1H), 2.62 (dd, J=4.0, 2.5 Hz, 1H).

後処理

  1. washwashed with saturated NaHCO3, water, and brine
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated
  4. custompurified by column chromatography (silica, 5% acetone/CH2Cl2)

出典と根拠

ORDレコード
ord-ba9d4a7aa5b64d619a2cdcd3cd496d94
出典データセット
uspto-grants-2005_10
特許番号
US06953793B2

反応ノート

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