Hydrochloric Acid → N-[(4,6-Dimethoxypyrimidin-2-yl)aminocarbonyl]-3-(methoxymethyl)thiophene-2-sulfonamide

Participants

Reaction Steps

To 0.41 g of 3-(methoxymethyl)thiophene-2-sulfonamide and 0.55 g of phenyl N-(4,6-dimethoxypyrimidin-2-yl)carbamate in 20 mL of acetonitrile is added 0.3 mL of 1,8-diazabicyclo-[5.4.0]undec-7-ene (DBU). After being stirred for 2 hours at ambient temperature and pressure, the reaction mass is poured onto 25-50 g of ice and the resultant mixture acidified to pH 3 by the addition of hydrochloric acid. The desired solid product can be isolated by filtration. Alternatively, it can be extracted into methylene chloride which is then dried over magnesium sulfate, filtered and evaporated to dryness to yield the desired product in sufficiently pure form for the purposes of this invention.

Provenance & Evidence