Lithium borohydride → [9-Chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]methanol

HRID 1628755ノート

反応式

HRID 1628755 の反応式
[BH4-].[Li+].[Cl:3][C:4]1[CH:5]=[CH:6][C:7]([C:27](OC)=[O:28])=[C:8]2[C:12]=1[N:11]=[C:10]1[N:13]([C:17]3[C:18]([CH3:26])=[N:19][C:20]([O:24][CH3:25])=[N:21][C:22]=3[CH3:23])[CH2:14][CH2:15][CH2:16][N:9]21>O1CCCC1>[Cl:3][C:4]1[C:12]2[N:11]=[C:10]3[N:13]([C:17]4[C:18]([CH3:26])=[N:19][C:20]([O:24][CH3:25])=[N:21][C:22]=4[CH3:23])[CH2:14][CH2:15][CH2:16][N:9]3[C:8]=2[C:7]([CH2:27][OH:28])=[CH:6][CH:5]=1

参加物

4

反応物 2

HCID 4148881Lithium borohydrideHCID 57786073Methyl 9-chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate

生成物 1

HCID 57786330[9-Chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]methanol収率 98%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
40 °C

実験手順

Lithium borohydride (1.93 g, 88.4 mmol) was added to a stirred solution of methyl 9-chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate (8.87 g, 22.1 mmol) in tetrahydrofuran (100 mL) at room temperature, and the mixture was stirred at 40° C. for 14 hr. The reaction was quenched by methanol, and the mixture was diluted with aqueous saturated ammonium chloride at 0° C. The mixture was extracted with tetrahydrofuran/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 ethyl acetate/diisopropyl ether to give the title compound as a colorless powder (8.08 g, 21.6 mmol, 98%).

後処理

  1. customThe reaction was quenched by methanol
  2. additionthe mixture was diluted with aqueous saturated ammonium chloride at 0° C
  3. extractionThe mixture was extracted with tetrahydrofuran/ethyl acetate
  4. washThe combined organic layer was washed with brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. washThe residue was washed with ethyl acetate/diisopropyl ether

出典と根拠

ORDレコード
ord-5c739bbcbec646ea91316792a987f7e5
出典データセット
uspto-grants-2014_07
特許番号
US08785460B2

反応ノート

読み込み中…