Diisopropylethylamine → 2-Ethyl-4-{5-[2-(1-ethyl-propyl)-6-methoxy-pyridin-4-yl]-[1,2,4]oxadiazol-3-yl}-6-methyl-phenol

HRID 245106ノート

反応式

HRID 245106 の反応式
[CH2:1]([CH:3]([C:6]1[CH:7]=[C:8]([CH:12]=[C:13]([O:15][CH3:16])[N:14]=1)[C:9]([OH:11])=O)[CH2:4][CH3:5])[CH3:2].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F.[CH2:48]([C:50]1[CH:51]=[C:52]([CH:57]=[C:58]([CH3:61])[C:59]=1[OH:60])[C:53]([NH:55]O)=[NH:54])[CH3:49]>CN(C=O)C.C(Cl)Cl>[CH2:48]([C:50]1[CH:51]=[C:52]([C:53]2[N:55]=[C:9]([C:8]3[CH:12]=[C:13]([O:15][CH3:16])[N:14]=[C:6]([CH:3]([CH2:1][CH3:2])[CH2:4][CH3:5])[CH:7]=3)[O:11][N:54]=2)[CH:57]=[C:58]([CH3:61])[C:59]=1[OH:60])[CH3:49]

参加物

7

反応物 4

HCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 584181082-(1-Ethylpropyl)-6-methoxyisonicotinic acidHCID 178436626HCID 178436626、化合物

生成物 1

HCID 1363910162-Ethyl-4-{5-[2-(1-ethyl-propyl)-6-methoxy-pyridin-4-yl]-[1,2,4]oxadiazol-3-yl}-6-methyl-phenol収率 47.7%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 6344Dichloromethane溶媒

実験手順

To a solution of 2-(1-ethyl-propyl)-6-methoxy-isonicotinic acid (436 mg, 1.95 mmol) and DIPEA (759 mg, 5.86 mmol) in DMF (30 mL), TBTU (627 mg, 1.95 mmol) is added. The mixture is stirred at rt for 15 min before 3-ethyl-4,N-dihydroxy-5-methyl-benzamidine (379 mg, 1.95 mmol) is added. Stirring is continued at rt for 2 h. The mixture is diluted with DCM (100 mL) and washed three times with sat. aq. NaHCO3 solution. The org. extract is dried over MgSO4, filtered and concentrated. The residue is dissolved in dioxane (20 mL) and the mixture is stirred at 100° C. for 18 h. The mixture is concentrated and the crude product is purified by prep. HPLC to give 2-ethyl-4-{5-[2-(1-ethyl-propyl)-6-methoxy-pyridin-4-yl]-[1,2,4]oxadiazol-3-yl}-6-methyl-phenol (355 mg) as a beige solid; LC-MS: tR=1.20 min, [M+H]+=382.04; 1H NMR (CDCl3): δ0.84 (t, J=7.3 Hz, 6H), 1.34 (t, J=7.5 Hz, 3H), 1.68-1.89 (m, 4H), 2.36 (s, 3H), 2.57-2.65 (m, 1H), 2.74 (q, J=7.8 Hz, 2H), 4.02 (s, 3H), 5.00 (s br, 1H), 7.33 (s, 1H), 7.45 (s, 1H), 7.85 (s, 2H).

後処理

  1. additionis added
  2. washwashed three times with sat. aq. NaHCO3 solution
  3. extractionextract
  4. dry with materialis dried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. dissolutionThe residue is dissolved in dioxane (20 mL)
  8. stirringthe mixture is stirred at 100° C. for 18 h
  9. concentrationThe mixture is concentrated
  10. customthe crude product is purified by prep

出典と根拠

ORDレコード
ord-12eaa4d43f414ca891013d94d6ec449c
出典データセット
uspto-grants-2014_02
特許番号
US08658675B2

反応ノート

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