Benzoic acid, 3-sulfo- → 3-(2-Methyl-propane-1-sulfonyl)-benzoic acid

Reaktionsgleichung

[S:1]([C:5]1[CH:6]=[C:7]([CH:11]=[CH:12][CH:13]=1)[C:8]([OH:10])=[O:9])([OH:4])(=[O:3])=O.C(=O)([O-])[O-].[K+].[K+].[CH2:20](I)[CH:21]([CH3:23])[CH3:22]>CC(N(C)C)=O>[CH3:20][CH:21]([CH3:23])[CH2:22][S:1]([C:5]1[CH:6]=[C:7]([CH:11]=[CH:12][CH:13]=1)[C:8]([OH:10])=[O:9])(=[O:3])=[O:4]

Komponenten

Versuchsvorschrift

To a suspension of 3-sulfo-benzoic acid (1 g) and potassium carbonate (1.2 g) in dimethylacetamide (10 ml) was added iso-butyl iodide (0.65 ml). The mixture was heated by microwaves (600W) at 150° C. for 15 minutes. The reaction mixture was partitioned between water (100 ml) and ethyl acetate (100 ml), the aqueous layer was separated, acidified to pH 1 with HCl (2N) and extracted with ethyl acetate (100 ml). The extract was evaporated to leave a residue which was purified by flash chromatography (Biotage 12S eluting with ethyl acetate:hexane:acetic acid, 29:70:1) to give the title product as a white solid (0.34 g).