Dimethylformamide → 4-Benzyl-3-butoxy-N,N-dimethyl-5-sulfamoylbenzamide

反応式

[CH2:1]([C:8]1[C:16]([S:17](=[O:20])(=[O:19])[NH2:18])=[CH:15][C:11]([C:12](O)=[O:13])=[CH:10][C:9]=1[O:21][CH2:22][CH2:23][CH2:24][CH3:25])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.S(Cl)(Cl)=O.[CH3:30][N:31](C)[CH:32]=O>>[CH2:1]([C:8]1[C:16]([S:17](=[O:20])(=[O:19])[NH2:18])=[CH:15][C:11]([C:12]([N:31]([CH3:32])[CH3:30])=[O:13])=[CH:10][C:9]=1[O:21][CH2:22][CH2:23][CH2:24][CH3:25])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

反応物 3

HCID 6228Dimethylformamide

HCID 24386Thionyl Chloride

HCID 537356464-Benzyl-3-n-butoxy-5-sulfamylbenzoic acid

生成物 1

HCID 540414804-Benzyl-3-butoxy-N,N-dimethyl-5-sulfamoylbenzamide

実験手順

A mixture of 4-benzyl-3-n-butoxy-5-sulfamylbenzoic acid (3.6 g), thionyl chloride (20 ml) and N,N-dimethylformamide (0.1 ml) is refluxed for 1 hour and is then evaporated in vacuo. The resulting crude 4-benzyl-3-n-butoxy-5-sulfamylbenzoyl chloride is dissolved in methylene chloride (30 ml), and the resulting solution is during about 15 minutes added dropwise to a stirred mixture of dimethylamine (10 ml; 40% in water) and methylene chloride (20 ml), keeping the temperature at 0°-5° C. by external cooling. After stirring for an additional 2 hours at 22°-25° C., the mixture is washed with water and the organic layer is separated and dried in the presence of magnesium sulphate. Filtration followed by evaporation in vacuo yields crude 4-benzyl-3-n-butoxy-5-sulfamyl-N,N-dimethylbenzamide. After recrystallization from benzene it is obtained with a melting point of 199°-201° C.