反应详情

Triethylamine (100 mL, 0.72 mol) followed by N,N-dimethylsulfamoyl chloride (42 mL, 0.38 mol) were added to a 0° C. solution of 4-(2,2-dimethylbutyl)-2-methyl-1H-imidazol-1-ol in methylene chloride (100 mL). After stirring at ambient temperature for 2 h, the reaction mixture was washed with water and brine, dried over magnesium sulfate, filtered and concentrated in vacuo. Chromatography over silica eluting with ethyl acetate/hexane followed by methanol afforded N-({[4-(2,2-dimethylbutyl)-2-methyl-1H-imidazol-1-yl]oxy}sulfonyl)-N-methylmethanamine (ca. 50% purity by HPLC) which was dissolved in 7:1 methanol/acetic acid (400 mL), and 10% Palladium (10% on activated carbon) (6 g) was added. After stirring under 40 psi hydrogen for 2 h, the reaction mixture was filtered through celite, rinsing with methanol and concentrated in vacuo. The residue was redissolved in ethyl acetate and washed with 1 N aqueous sodium hydroxide and brine, dried (magnesium sulfate), filtered and concentrated in vacuo. Chromatography over silica eluting with 5-20% methanol/methylene chloride afforded 4-(2,2-dimethylbutyl)-2-methyl-1H-imidazole.

1. washthe reaction mixture was washed with water and brine
2. dry with materialdried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo