Di-tert-butyl dicarbonate → 6-(2,4-Difluorophenoxy)-3-iodo-4-methyl-5-oxo-4,5-dihydro-pyrazolo[4,3-b]pyridine-1-carboxylic acid tert-butyl ester

HRID 2114558Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2114558
[F:1][C:2]1[CH:20]=[C:19]([F:21])[CH:18]=[CH:17][C:3]=1[O:4][C:5]1[C:10](=[O:11])[N:9]([CH3:12])[C:8]2[C:13]([I:16])=[N:14][NH:15][C:7]=2[CH:6]=1.[O:22](C(OC(C)(C)C)=O)[C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=O>O1CCCC1.CN(C1C=CN=CC=1)C.C(OCC)(=O)C.O>[C:26]([O:25][C:23]([N:15]1[C:7]2[CH:6]=[C:5]([O:4][C:3]3[CH:17]=[CH:18][C:19]([F:21])=[CH:20][C:2]=3[F:1])[C:10](=[O:11])[N:9]([CH3:12])[C:8]=2[C:13]([I:16])=[N:14]1)=[O:22])([CH3:29])([CH3:28])[CH3:27]

Komponenten

7

Edukt 2

HCID 90495Di-tert-butyl dicarbonateHCID 1784815796-(2,4-Difluorophenoxy)-3-iodo-4-methyl-1,4-dihydro-pyrazolo[4,3-b]pyridin-5-one

Produkt 1

HCID 598128286-(2,4-Difluorophenoxy)-3-iodo-4-methyl-5-oxo-4,5-dihydro-pyrazolo[4,3-b]pyridine-1-carboxylic acid tert-butyl esterAusbeute 120 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a solution of 6-(2,4-difluorophenoxy)-3-iodo-4-methyl-1,4-dihydro-pyrazolo[4,3-b]pyridin-5-one (12 mg, 0.0298 mmol) in tetrahydrofuran (5 mL) was added BOC2O (16 mg, 2.5 eq) and DMAP (catalytic). The resulting mixture was heated under reflux for 30 minutes, cooled to room temperature, and diluted with ethyl acetate (35 mL) and water (25 mL). The organic layer was separated, washed successively with water (2×25 mL), 0.5 N HCl (2×20 mL) and brine (1×25 mL), dried over magnesium sulfate, filtered and concentrated to give the title compound as a white powder (18 mg, (M+H)+=504).

Aufarbeitung

  1. temperatureThe resulting mixture was heated
  2. temperatureunder reflux for 30 minutes
  3. customThe organic layer was separated
  4. washwashed successively with water (2×25 mL), 0.5 N HCl (2×20 mL) and brine (1×25 mL)
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-72b68bc5d71e4b24a5d2ff2333750a7d
Quelldatensatz
uspto-grants-2008_10
Patentnummer
US07435731B2

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