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

HRID 386577
ノート
印刷プレビュー

反応式

HRID 386577 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:32](OC)=[O:33])=[N:17][N:18]([C:22]3[CH:27]=[CH:26][C:25]([S:28]([CH3:31])(=[O:30])=[O:29])=[CH:24][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>[OH:33][CH2:32][C:16]1[C:15]([O:14][CH:11]2[CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[CH2:13][CH2:12]2)=[CH:20][C:19](=[O:21])[N:18]([C:22]2[CH:23]=[CH:24][C:25]([S:28]([CH3:31])(=[O:30])=[O:29])=[CH:26][CH:27]=2)[N:17]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 962WaterHCID 8857Ethyl AcetateHCID 4311764Sodium borohydrideHCID 44621631Methyl 4-(1-(tert-butoxycarbonyl)piperidin-4-yloxy)-1-(4-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate

生成物 1

HCID 67072635Tert-butyl 4-(3-(hydroxymethyl)-1-(4-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate収率 95.9%

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-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate (example 18) (254 mg, 0.5 mmol) in THF/MeOH (1:1) (10 mL) at room temperature under argon was added NaBH4 (95 mg, 2.5 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. 230 mg (95%) of tert-butyl 4-(3-(hydroxymethyl)-1-(4-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate was obtained as a white solid MS (ESI) 434 (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-5bf456bc046748f2bce568e65e984b26
出典データセット
uspto-grants-2013_02
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08372837B2

反応ノート

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