Potassium Carbonate → Methyl 9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate

HRID 1399041ノート

反応式

HRID 1399041 の反応式
CS(Cl)(=O)=O.[Cl:6][C:7]1[C:15]2[N:14]=[C:13]([NH:16][C:17]3[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][C:18]=3[Cl:24])[N:12]([CH2:25][CH2:26][CH2:27]O)[C:11]=2[C:10]([C:29]([O:31][CH3:32])=[O:30])=[CH:9][CH:8]=1.S([O-])(=O)(=O)C.C(=O)([O-])[O-].[K+].[K+]>O1CCCC1.C(=O)([O-])O.[Na+].CN(C)C=O.C(N(CC)CC)C.N1C=CC=CC=1>[Cl:6][C:7]1[CH:8]=[CH:9][C:10]([C:29]([O:31][CH3:32])=[O:30])=[C:11]2[C:15]=1[N:14]=[C:13]1[N:16]([C:17]3[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][C:18]=3[Cl:24])[CH2:27][CH2:26][CH2:25][N:12]21

参加物

10

反応物 4

HCID 11430Potassium CarbonateHCID 31297Methanesulfonyl chlorideHCID 85257MethanesulfonateHCID 68762786Methyl 4-chloro-2-[(2,4-dichlorophenyl)amino]-1-(3-hydroxypropyl)-1H-benzimidazole-7-carboxylate

生成物 1

HCID 57785909Methyl 9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate収率 87.4%

試薬・触媒・溶媒 5

HCID 1049Pyridine溶媒HCID 6228Dimethylformamide溶媒HCID 8028Tetrahydrofuran溶媒HCID 8471Triethylamine溶媒HCID 516892Sodium Bicarbonate溶媒2 回

反応条件

温度
0 °C

実験手順

Methanesulfonyl chloride (11.3 mL, 143 mmol) was added to a stirred solution of methyl 4-chloro-2-[(2,4-dichlorophenyl)amino]-1-(3-hydroxypropyl)-1H-benzimidazole-7-carboxylate (Reference example 117, 15.3 g, 35.7 mmol), pyridine (50 mL) and triethylamine (25 mL) in tetrahydrofuran (100 mL) at 0° C. The mixture was stirred at 0° C. for 13 hr, and diluted with aqueous sodium hydrogen carbonate and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. A mixture of the resulting mesylate and potassium carbonate (14.7 g, 106 mmol) in N,N-dimethylformamide (60 mL) was stirred at 70° C. for 4 hr. The mixture was diluted with aqueous sodium hydrogen carbonate, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was washed with diisopropyl ether to give the title compound as a colorless powder (12.8 g, 31.2 mmol, 87% in 2 steps).

後処理

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. stirringwas stirred at 70° C. for 4 hr
  7. extractionextracted with ethyl acetate
  8. washThe combined organic layer was washed with brine
  9. dry with materialdried over anhydrous magnesium sulfate
  10. filtrationfiltered
  11. concentrationconcentrated in vacuo
  12. washThe residue was washed with diisopropyl ether

出典と根拠

ORDレコード
ord-b5517586e9c64fe795c809532eb48dbd
出典データセット
uspto-grants-2014_12
特許番号
US08901141B2

反応ノート

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