Sodium Hydroxide → 5-methyl-4-(1-methyl-1H-pyrazol-5-yl)-2-furancarboxylic acid
Reaktionsgleichung
[CH3:1][C:2]1[O:6][C:5]([C:7]([O:9]C)=[O:8])=[CH:4][C:3]=1[C:11]1[N:15]([CH3:16])[N:14]=[CH:13][CH:12]=1.[OH-].[Na+]>O1CCCC1>[CH3:1][C:2]1[O:6][C:5]([C:7]([OH:9])=[O:8])=[CH:4][C:3]=1[C:11]1[N:15]([CH3:16])[N:14]=[CH:13][CH:12]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of methyl 5-methyl-4-(1-methyl-1H-pyrazol-5-yl)-2-furancarboxylate (200 mg, 0.91 mmol) in 6N sodium hydroxide (2.3 ml, 13.62 mmol) and tetrahydrofuran (4.5 ml) was stirred at 70° C. in a sealed tube for 1 h. The resulting solution was cooled and then partitioned between H2O-DCM. The aqueous phase was adjusted to pH ˜4 and then washed several times with DCM. The combined organic fractions were dried over Na2SO4 and concentrated affording 5-methyl-4-(1-methyl-1H-pyrazol-5-yl)-2-furancarboxylic acid (130 mg, 0.57 mmol, 63% yield) as a yellow oil: LCMS (ES) m/e 207 (M+H)+.