Sodium hydride → HCID 23276671, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of sodium hydride (8.7 g) in dry tetrahydrofuran (400 ml) was stirred at 25° C., and N-acetyl-2,6-dichloro-3-methylaniline (50.4 g) was added portionwise. After stirring for 15 minutes, 5-methyl-1-(2-pyrimidinyl)-1,2,4-triazole-3-sulphonyl chloride (30 g), prepared by a method analogous to that of Example A was added over 5 minutes. The mixture was stirred at 25° C. for 18 hours and the solvent was removed in vacuo. The residue was treated with 1M sodium hydroxide solution (500 ml) for 5 minutes with stirring, and was then extracted with ethyl acetate (500 ml). The ethyl acetate layer was re-extracted with 1M sodium hydroxide solution (300 ml). The combined aqueous phases were acidified with concentrated hydrochloric acid and the solid was filtered off. Recrystallisation from acetonitrile gave 38 g of the desired product, mp 214°-216° C.

Provenance & Evidence