Dimethylformamide → 1-(5,6-Dichloro-benzimidazol-1-yl)-3,3-dimethyl-butan-2-ol

HRID 853834

反応式

HRID 853834 の反応式
[Cl:1][C:2]1[C:10]([Cl:11])=[CH:9][C:5]2[N:6]=[CH:7][NH:8][C:4]=2[CH:3]=1.[O:12]1[CH:14]([C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:13]1.C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>C(OCC)(=O)C>[Cl:11][C:10]1[C:2]([Cl:1])=[CH:3][C:4]2[N:8]([CH2:13][CH:14]([OH:12])[C:15]([CH3:18])([CH3:17])[CH3:16])[CH:7]=[N:6][C:5]=2[CH:9]=1

参加物

6

反応物 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 921742-tert-ButyloxiraneHCID 3317755,6-Dichloro-1H-benzimidazole

生成物 1

HCID 589326341-(5,6-Dichloro-benzimidazol-1-yl)-3,3-dimethyl-butan-2-ol収率 73.3%

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒

反応条件

温度
160 °C

実験手順

A large (2-5 mL) microwave reactor flask was charged with 5,6-dichlorobenzimidazole (571 mg, 3.1 mmol), 1,2-epoxy-3,3-dimethylbutane (307 mg, 3.1 mmol), powdered anhydrous potassium carbonate (424 mg, 3.1 mmol) and DMF (1.5 mL). The reaction was then heated in a microwave reactor for 6 minutes at 160° C. The reaction was then diluted with ethyl acetate and extracted with water three times. The organics were dried over MgSO4 and the solvent was removed. The residue was crystallized from CH2Cl2 to afford 653 mg (73%) of product as a white solid: 1H NMR (DMSO, 400 MHz) δ 1.06 (s, 9H), 3.47 (dd, 1H, J=2.0, J2=10.4), 4.08 (dd, 1H, J1=10.5, J2=14.4), 4.47 (dd, 1H, J1=2.0, J2=14.4), 7.75 (s, 1H), 7.79 (s, 1H), 8.23 (s, 1H); HPLC-MS calcd. for C21H22Cl2N4O2 (M+H+) 287.1, found 287.3.

後処理

  1. extractionextracted with water three times
  2. dry with materialThe organics were dried over MgSO4
  3. customthe solvent was removed
  4. customThe residue was crystallized from CH2Cl2

出典と根拠

ORDレコード
ord-b0e6f8f091394914b5c91aaf2ba37a13
出典データセット
uspto-grants-2007_08
特許番号
US07256207B2

関連ノート

読み込み中…