反应详情

温度

25 °C

A solution of 5.4 g (0.02 mol) of the product from Example 1 in 10 ml of methylene chloride is added dropwise to 3.1 g (0.02 mol) of 2-amino-4,6-dimethoxypyrimidine in 50 ml of methylene chloride at 0° C. The mixture is subsequently stirred at 25° C. for 24 hours and diluted with 50 ml of methylene chloride and the organic phase is washed twice with 50 ml of 2N hydrochloric acid each time and once with 50 ml of water. After drying with sodium sulfate and removing the solvent on a rotary evaporator, an oily product remains, which crystallizes on trituration with diethylether. 6.8 g (77% of theory) of methyl 2-[3-(4,6-dimethoxypyrimidin-2-yl)-ureidosulfonyloxy]-3-methoxy-benzoate of melting point 169°-170° C. are obtained.

1. washthe organic phase is washed twice with 50 ml of 2N hydrochloric acid each time
2. dry with materialAfter drying with sodium sulfate
3. customremoving the solvent
4. customon a rotary evaporator
5. customwhich crystallizes on trituration with diethylether