反应详情

To 5-[2-(3-Ethyl-ureido)-4-methyl-thiazol-5-yl]-2-methoxy benzenesulfonylchloride (Example 28d) (0.2 g, 0.514 mmol) in dioxane (10 ml) is added 2M Na2CO3 (0.515 ml) followed by ethanolamine (0.031 ml, 0.514 mmol). After 2 hours at room temperature, the reaction mixture is poured into water (150 ml)/ethylacetate (50 ml) and sonicated. The layers are separated then the aqueous layer is extracted with ethyl acetate (3×50 ml). The combined organic layers are dried over MgSO4, filtered and concentrated to afford a sticky oil which is dissolved in a minimum amount of DCM/methanol and dried at reduced pressure to afford 5-[2-(3-ethyl-ureido)-4-methyl-thiazol-5-yl]-N-(2-hydroxy-ethyl)-2-methoxy-benzenesulfonamide as a yellow foam.

1. customsonicated
2. customThe layers are separated
3. extractionthe aqueous layer is extracted with ethyl acetate (3×50 ml)
4. dry with materialThe combined organic layers are dried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto afford a sticky oil which
8. customdried at reduced pressure