反应详情

To a solution of 7.51 g (0.1 mole) of 2-methoxyethylamine in 20 ml of water 5.21 g (0.02 mole) of 1,2,3,4-tetrahydro-2,3-dioxo-6-quinoxalinesulfonyl chloride are added in small portions, under stirring, and the mixture is stirred at room temperature for 16 hours. It is allowed to stand further for 2 days, and then 15 ml of acetic acid and 10 ml of water are added to it. The separated crystals are filtered, washed successively with water and acetone, dried, dissolved in a slight amount of hot dimethyl sulfoxide and precipitated from the solution with water. Thus 3.80 g (63%) of 1,2,3,4-tetra-hydro-N-(2-methoxy-ethyl)-2,3-dioxo-6-quinoxaline sulfonamide are obtained, m.p.: 264-267° C.

1. stirringthe mixture is stirred at room temperature for 16 hours
2. filtrationThe separated crystals are filtered
3. washwashed successively with water and acetone
4. customdried
5. dissolutiondissolved in a slight amount of hot dimethyl sulfoxide
6. customprecipitated from the solution with water