Water → Tert-butyl 4-(1-(4-cyano-3-fluorophenyl)-3-(hydroxymethyl)-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate

HRID 386582

反応式

HRID 386582 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[C:16]([C:31](OC)=[O:32])=[N:17][N:18]([C:22]3[CH:27]=[CH:26][C:25]([C:28]#[N:29])=[C:24]([F:30])[CH:23]=3)[C:19](=[O:21])[CH:20]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[BH4-].[Na+].CCOC(C)=O.O>C1COCC1.CO>[C:28]([C:25]1[CH:26]=[CH:27][C:22]([N:18]2[C:19](=[O:21])[CH:20]=[C:15]([O:14][CH:11]3[CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[O:7])[CH2:13][CH2:12]3)[C:16]([CH2:31][OH:32])=[N:17]2)=[CH:23][C:24]=1[F:30])#[N:29]

参加物

6

反応物 4

HCID 962WaterHCID 8857Ethyl AcetateHCID 4311764Sodium borohydrideHCID 44620996Methyl 4-(1-(tert-butoxycarbonyl)piperidin-4-yloxy)-1-(4-cyano-3-fluorophenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate

生成物 1

HCID 44621180Tert-butyl 4-(1-(4-cyano-3-fluorophenyl)-3-(hydroxymethyl)-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate収率 83.2%

試薬・触媒・溶媒 1

HCID 21899815MeOH tetrahydrofuran溶媒

実験手順

To a stirring solution of methyl 4-(1-(tert-butoxycarbonyl)piperidin-4-yloxy)-1-(4-cyano-3-fluorophenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate (27.2 mg, 0.1 mmol) in THF/MeOH (1:1) (3 mL) at room temperature under argon was added NaBH4 (18.9 mg, 0.5 mmol) at 0° C. in an ice bath under argon carefully. The reaction mixture was allowed to warm to room temperature gradually and stirred overnight. EtOAc (20 mL) and water (20 mL) were added to the reaction mixture. Layers were separated. Organic layer were washed with water (15 mL), and brine (15 mL). Organic phase was dried (MgSO4), filtered and concentrated. The crude product was dissolved in a small amount of DCM (˜2 ml) and loaded onto a 40 g ISCO silica gel column which was eluted with a 20 min gradient from 20% to 100% EtOAc/Hexanes. 37 mg (82%) of tert-butyl 4-(1-(4-cyano-3-fluorophenyl)-3-(hydroxymethyl)-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate was obtained as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 1.39-1.53 (m, 9H) 1.68-1.88 (m, 2H) 1.88-2.09 (m, 2H) 2.51 (t, J=5.93 Hz, 1H) 3.20-3.49 (m, 2H) 3.54-3.76 (m, 2H) 4.43-4.63 (m, 1H) 4.69 (d, J=5.71 Hz, 2H) 6.23 (s, 1H) 7.53-7.85 (m, 3H). MS (ESI) 389 (M+H-tBu).

後処理

  1. customLayers were separated
  2. washOrganic layer were washed with water (15 mL), and brine (15 mL)
  3. dry with materialOrganic phase was dried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. dissolutionThe crude product was dissolved in a small amount of DCM (˜2 ml)
  7. washwas eluted with a 20 min gradient from 20% to 100% EtOAc/Hexanes

出典と根拠

ORDレコード
ord-70b72e3bf25048bc951e13769396ed39
出典データセット
uspto-grants-2013_02
特許番号
US08372837B2

関連ノート

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