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Hydrochloric Acid → 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid

HRID 657369
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 657369
[CH2:1]([N:3]1[C:7]2=[N:8][C:9]([CH2:24][CH3:25])=[C:10]([C:19]([O:21]CC)=[O:20])[C:11]([NH:12][CH:13]3[CH2:18][CH2:17][O:16][CH2:15][CH2:14]3)=[C:6]2[CH:5]=[N:4]1)[CH3:2].[Li+].[OH-].CO.Cl>O.[Cl-].[Na+].O>[CH2:1]([N:3]1[C:7]2=[N:8][C:9]([CH2:24][CH3:25])=[C:10]([C:19]([OH:21])=[O:20])[C:11]([NH:12][CH:13]3[CH2:18][CH2:17][O:16][CH2:15][CH2:14]3)=[C:6]2[CH:5]=[N:4]1)[CH3:2]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 3939Lithium HydroxideHCID 59683211Ethyl 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate

Produkt 1

HCID 578133071,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acidAusbeute 203,1 %

Reagenzien, Katalysatoren, Lösungsmittel

2
HCID 962WaterLösungsmittel2×HCID 57417360Sodium chloride; waterLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of ethyl 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (2 g, 4.30 mmol), LiOH (901 mg, 21.48 mmol), water (4 mL) and methanol (8 mL) was heated in a microwave oven for about 20 min at about 80° C. The reaction mixture was diluted with water and then washed with ethyl acetate to get rid of starting material. The aqueous layer was then acidified with 2N HCl, saturated with brine and then extracted with a mixture of DCM and IPA (3:1 ratio) twice. The combined organic layer was dried under vacuum to give the crude product. It was then triturated with ether to give pure product 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid as a yellow solid (2.78 g, 95%). LC-MS m/z 319 (M+H)+.

Aufarbeitung

  1. washwashed with ethyl acetate
  2. customto get
  3. extractionextracted with a mixture of DCM and IPA (3:1 ratio) twice
  4. customThe combined organic layer was dried under vacuum
  5. customto give the crude product
  6. customIt was then triturated with ether

Quellen und Nachweise

ORD-Eintrag
ord-4b85aa5faedc470291b1013c170ca63a
Quelldatensatz
uspto-grants-2011_12
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08071588B2

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