Potassium Carbonate → 3-[4-(4-Cyano-phenyl)-pyrazol-1-ylmethyl]-benzoic acid methyl ester

反応式

[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([CH2:10][N:11]2[CH:15]=[C:14](Br)[CH:13]=[N:12]2)[CH:5]=1.[C:18]([C:20]1[CH:25]=[CH:24][C:23](B(O)O)=[CH:22][CH:21]=1)#[N:19].C(=O)([O-])[O-].[K+].[K+]>>[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([CH2:10][N:11]2[CH:15]=[C:14]([C:23]3[CH:24]=[CH:25][C:20]([C:18]#[N:19])=[CH:21][CH:22]=3)[CH:13]=[N:12]2)[CH:5]=1

参加物

反応物 3

HCID 11430Potassium Carbonate

HCID 27343264-Cyanophenylboronic acid

HCID 17024610methyl 3-[(4-bromo-1H-pyrazol-1-yl)methyl]benzoate

生成物 1

HCID 675085333-[4-(4-Cyano-phenyl)-pyrazol-1-ylmethyl]-benzoic acid methyl ester収率 32%

実験手順

Charge a microwave vial with 3-(4-bromo-pyrazol-1-ylmethyl)-benzoic acid methyl ester (0.60 g, 2.00 mmol), 4-cyanophenylboronic acid (0.35 g, 2.40 mmol), potassium carbonate (0.50 g, 4.80 mmol) and tetrakistriphenylphosphine palladium (0) (0.23 g, 0.2 mmol). Flush the vessel with inert gas and seal. Dissolve the contents of the vial in 10 mL of a 4:1 dioxane-water mixture and microwave at 150° C. for 5 minutes. Dilute the reaction mixture with EtOAc, dry over sodium sulfate, filter and concentrate to give an oil. Purify the residue by flash chromatography using a gradient of 0-50% EtOAc/hexanes to afford 0.20 g, 32% yield of 3-[4-(4-cyano-phenyl)-pyrazol-1-ylmethyl]-benzoic acid methyl ester as a solid.