Methylamine → 5-Amino-1-(4-fluorophenyl)-4-[3-(methylaminocarbonylmethyloxy)benzoyl]pyrazole

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Reaktionsgleichung

[NH2:1][C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([F:13])=[CH:9][CH:8]=2)[N:5]=[CH:4][C:3]=1[C:14](=[O:26])[C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([O:21][CH2:22][C:23]([OH:25])=O)[CH:16]=1.C(C1NC=CN=1)([C:29]1[NH:30]C=CN=1)=O.CN>O1CCCC1.C(OCC)(=O)C>[NH2:1][C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([F:13])=[CH:9][CH:8]=2)[N:5]=[CH:4][C:3]=1[C:14](=[O:26])[C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([O:21][CH2:22][C:23]([NH:30][CH3:29])=[O:25])[CH:16]=1

Komponenten

Reaktionsbedingungen

Temperatur: 60 °C

Versuchsvorschrift

To a solution of 5-amino-4-[3-(carboxymethyloxy)benzoyl]-1-(4-fluorophenyl)-pyrazole (0.5 g, 1.43 mmol) in tetrahydrofuran (10 ml) was added carbonyl diimidazole (0.3 g, 1.85 mmol) and the reaction mixture was heated at 60° C. After 1 h, methylamine (10 ml, 5 mmol, 0.5 M solution in tetrahydrofuran) was added and reaction was continued at 60° C. overnight. The reaction mixture was cooled and diluted with ethyl acetate. The organic layer was separated and washed with brine and dried over sodium sulfate. The organics were removed in vacuo and the residue was purified by flash chromatography (elution gradient: 20-30% acetone/hexane) to give 5-amino-1-(4-fluorophenyl)-4-[3-(methylaminocarbonylmethyloxy)benzoyl]pyrazole (0.25 g, mpt. 195.6-196.3° C.) as a solid.

Aufarbeitung

customreaction
waitwas continued at 60° C. overnight
temperatureThe reaction mixture was cooled
customThe organic layer was separated
washwashed with brine
dry with materialdried over sodium sulfate
customThe organics were removed in vacuo
customthe residue was purified by flash chromatography (elution gradient: 20-30% acetone/hexane)

Quellen und Nachweise

ORD-Eintrag: ord-f492f002ec2043efa1f3dbd17046ae6d
Quelldatensatz: uspto-grants-2002_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06376527B1

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