反应详情

To 75 milliliters of methylene chloride maintained at 0°-5° C. via an ice bath were added 1.4 grams of 4-methyl-6-methoxy-2-amino-1,3,5-triazine and 1.55 grams of chlorosulfonyl isocyanate. After stirring for 3 hours at ice bath temperature a methylene chloride solution containing 1.0 gram of triethylamine and 1.37 grams of 2-(1-hydroxyethyl)aniline was added dropwise. The reaction mixture was removed from the ice bath, allowed to stir an additional one-half hour and then poured into 100 milliliters of 2 percent aqueous hydrochloric acid solution. After phase separation, the organic layer was washed in water and concentrated on a rotary evaporator affording a dark oil. Addition of diethyl ether to the dark oil resulted in the formation of a precipitate which was filtered-off. The filtrate was evaporated and the residue was taken-up in chloroform and again evaporated affording a powdery solid. Vacuum drying afforded 1.7 grams of light tan solid confirmed by NMR analysis as the desired product.

1. additionwas added dropwise
2. customThe reaction mixture was removed from the ice bath
3. additionpoured into 100 milliliters of 2 percent aqueous hydrochloric acid solution
4. customAfter phase separation
5. washthe organic layer was washed in water
6. concentrationconcentrated on a rotary evaporator
7. customaffording a dark oil
8. customresulted in the formation of a precipitate which
9. customThe filtrate was evaporated
10. customagain evaporated
11. customaffording a powdery solid
12. customVacuum drying
13. customafforded 1.7 grams of light tan solid