反应详情

50 mg (113 μmol) of methyl 2-[([(4,6-dimethoxy-1,3,5-triazin-2-yl)amino]-carbonylamino)sulfonyl]-6-nitrobenzoate are suspended in a mixture of 3 ml of methanol/dimethylformamide (5:1), admixed with 10 mg. of palladium on activated carbon (5%) and 1 mg (8.20 μmol) of sodium (meta)vanadate and, hydrogenated under atmospheric pressure and at room temperature for 3 h. The mixture is then filtered off, the filtrate is concentrated and the residue is taken up in water and adjusted to pH 1.5 using 3 N aqueous hydrochloric acid solution. The precipitate is stirred in an ice-bath for 10 min and then filtered off with suction and dried under reduced pressure. This gives 41 mg (87% of theory) of methyl 2-amino-6-[([(4,6-dimethoxy-1,3,5-triazin-2-yl)amino]carbonylamino)sulfonyl]benzoate of m.p. 129-134° C. (decomp.).

1. filtrationThe mixture is then filtered off
2. concentrationthe filtrate is concentrated
3. filtrationfiltered off with suction
4. customdried under reduced pressure