反应详情

To 100 ml of methanol, cooled to -5° C., there is added dropwise 11.9 g (0.1 mol) of thionyl chloride. Upon completion of the addition 13.23 g (0.05 mol) of 1-(4-chlorophenyl)-1,4-dihydro-4-oxo-6-methylpyridazine-3-carboxylic Acid (see Example 12) is added. The suspension formed is vacuum filtered after stirring at room temperature for 3 hrs. to afford the product, mp 183°-193° C. decomp. Treatment of the product with water affords the Methyl 1-(4-chlorophenyl)-1,4-dihydro-4-oxo-6-methylpyridazine-3-carboxylate.

1. additionis added
2. customThe suspension formed
3. filtrationfiltered
4. customto afford the product, mp 183°-193° C. decomp