p-Toluenesulfonic acid → Methyl 4-(4-fluoro-2-hydroxyphenylamino)-5-methylthieno[2,3-d]pyrimidine-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-chloro-5-methyl-thieno[2,3-d]pyrimidine-6-carboxylic acid methyl ester (500 mg), 2-amino-5-fluor-phenol (265 mg) and p-toluenesulfonic acid (75 mg) in dioxane (5 ml) was stirred at 140° C. for 15 minutes under microwave radiation. The reaction mixture was allowed to cool, filtered and the filtercake was washed with dioxane, MeOH and diethyl ether to give the desired product.

Provenance & Evidence