Thionyl Chloride → N-[1-(Chloromethyl)-2-methylpropyl]-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1(2H)-pyrimidinyl]-1,2-benzisothiazole-3-carboxamide

Participants

Reaction Steps

To 5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1(2H)-pyrimidinyl]-N-[1-(hydroxymethyl)-2-methylpropyl]-1,2-benzisothiazole-3-carboxamide(1.89 g, 4.14 mmol) at 0° C. is added thionyl chloride (5.00 ml). The resultant mixture is stirred one hour at 0° C. and two hours at room temperature. Anhydrous diethyl ether is added and the resultant suspension stirred vigorously for 1.75 hour. The suspension is filtered to afford the title compound as a cream-colored solid (1.77 g, 89.8%, mp>220° C.) which is identified by NMR spectral analysis.

Provenance & Evidence