反应详情

A slurry of 0.52 g (1.7 mmol) of 4-(5-amino-1,3,4-thiadiazol-2-yl]-2,6-bis(1,1-dimethylethyl)phenol and 0.26 g (2.58 mmol) of triethylamine in 6 ml of toluene is treated with 0.30 g (2.58 mmol) of methane sulfonylchloride and warmed at 95°-105° C. for 21 hours under Nitrogen atmosphere. The reaction is cooled to room temperature and poured onto cold aqueous 1N NaOH (100 ml) and extracted with t-butylmethyl ether (3×20 ml). The aqueous layer is acidified with aqueous 1N HCl and filtered to give a yellow solid. Recrystallization from absolute ethanol gives 0.19 g (0.65 g, theor., 29%) of N-[5-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1,3,4-thiadiazol-2-yl]methanesulfonamide as a solid: mp 293°-294° C.

1. temperaturewarmed at 95°-105° C. for 21 hours under Nitrogen atmosphere
2. extractionextracted with t-butylmethyl ether (3×20 ml)
3. filtrationfiltered
4. customto give a yellow solid
5. customRecrystallization from absolute ethanol