反应详情

142 mg of tert-butyl {3-[(2-guanidino-4-methyl-thiazole-5-carbonyl)-amino]-phenoxy}-acetate is stirred in 1.1 ml of methylene chloride and 1.1 ml of trifluoroacetic acid (TFA) for 2 hrs. at RT. The reaction mixture is evaporated in a vacuum, the residue is taken up in water and the solution is evaporated to dryness. The solid is suspended in water, adjusted to pH 8 with 1N ammonia while stirring, filtered off under suction, washed with water and dried. There are obtained 101 mg of [3-[(2-guanidino-4-methyl-thiazole-5-carbonyl)-amino]-phenoxy]-acetic acid, m.p. 284° C., MS: 350 (M+H)+.

1. customat RT
2. customThe reaction mixture is evaporated in a vacuum
3. customthe solution is evaporated to dryness
4. filtrationfiltered off under suction
5. washwashed with water
6. customdried