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Carbamide Peroxide → 4-((1-(tert-butoxycarbonyl)-4-carbamoylpiperidin-4-yl)methyl)-1-tert-butyl-1H-pyrazole-3-carboxylic acid

HRID 537112
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Reaktionsgleichung von HRID 537112
[C:1]([N:5]1[CH:9]=[C:8]([CH2:10][C:11]2([C:24]#[N:25])[CH2:16][CH2:15][N:14]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:13][CH2:12]2)[C:7]([C:26]([O:28]CC)=[O:27])=[N:6]1)([CH3:4])([CH3:3])[CH3:2].NC(N)=[O:33].OO>CO.[OH-].[Na+]>[C:20]([O:19][C:17]([N:14]1[CH2:15][CH2:16][C:11]([CH2:10][C:8]2[C:7]([C:26]([OH:28])=[O:27])=[N:6][N:5]([C:1]([CH3:3])([CH3:4])[CH3:2])[CH:9]=2)([C:24](=[O:33])[NH2:25])[CH2:12][CH2:13]1)=[O:18])([CH3:23])([CH3:22])[CH3:21]
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Komponenten

5

Edukt 2

HCID 31294Carbamide PeroxideHCID 67491622tert-butyl 4-((1-tert-butyl-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)methyl)-4-cyanopiperidine-1-carboxylate

Produkt 1

HCID 674914864-((1-(tert-butoxycarbonyl)-4-carbamoylpiperidin-4-yl)methyl)-1-tert-butyl-1H-pyrazole-3-carboxylic acidAusbeute 93,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittel
HCID 14798
Sodium Hydroxide
Lösungsmittel

Versuchsvorschrift

To a 0° C. solution of tert-butyl 4-((1-tert-butyl-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)methyl)-4-cyanopiperidine-1-carboxylate (455 mg, 1.09 mmol) in methanol (11 mL) was added a solution of urea-hydrogen peroxide (1.05 g, 10.9 mmol) in 1 M aqueous sodium hydroxide (10.9 mL), dropwise. After stirring for 18 hours at room temperature, volatiles were removed under reduced pressure and the resultant slurry was taken up in water (50 mL), acidified with 2 N aqueous hydrochloric acid and extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated to yield 4-((1-(tert-butoxycarbonyl)-4-carbamoylpiperidin-4-yl)methyl)-1-tert-butyl-1H-pyrazole-3-carboxylic acid (418 mg) as a colorless solid. −APCI (M−H) 407.3; 1H NMR (400 MHz, DMSO-d6, δ): 12.33 (br. s., 1H), 7.47 (s, 1H), 7.11 (br. s., 1H), 6.99 (s, 1H), 3.59 (d, J=13.3 Hz, 2H), 2.89 (s, 2H), 2.77 (m, 2H), 1.84 (m, 2H), 1.44 (s, 9H), 1.31 (s, 9H), 1.16 (m, 2H).

Aufarbeitung

  1. customvolatiles were removed under reduced pressure
  2. extractionextracted with ethyl acetate (2×50 mL)
  3. dry with materialThe combined organic extracts were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-bb9040f98f5b48e6af4ab8802e9a8a06
Quelldatensatz
uspto-grants-2014_10
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08859773B2

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