2-Amino-4-chloro-6-methylpyrimidine → Methyl 2-[3-(4-chloro-6-methylpyrimidin-2-yl)-ureidosulfonyloxy]-3-methoxybenzoate

Participants

Reaction Conditions

Reaction Steps

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 2.9 g (0.02 mol) of 2-amino-4-chloro-6-methylpyrimidine 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 water. After drying with sodium sulfate and removing the solvent on a rotary evaporator, an oily product remains, which crystallizes on trituration with diisopropylether. 7.8 g (91% of theory of methyl 2-[3-(4-chloro-6-methylpyrimidin-2-yl)-ureidosulfonyloxy]-3-methoxybenzoate of melting point 140°-143° C. are obtained.

Provenance & Evidence