Isopropyl iodide → 2-(4-chlorophenyl)-6-isopropoxy-4-methyl-2H-1,2,4-benzothiadiazine-3(4H)-one 1,1-dioxide

Participants

Reaction Conditions

Reaction Steps

A suspension of 2-(4-chlorophenyl)-6-hydroxy-4-methyl-2H-1,2,4-benzothiadiazine-3(4H)-one 1,1-dioxide (15.33 g), potassium carbonate (7.50 g) and 2-iodopropane (5.43 ml) in N,N-dimethylformamide (150 ml) was stirred for 2 hours at 60° C. The mixture was poured into ice water. The separated solid was collected by filtration, dried, and recrystallized from ethanol to yield 2-(4-chlorophenyl)-6-isopropoxy-4-methyl-2H-1,2,4-benzothiadiazine-3(4H)-one 1,1-dioxide (13.54 g) as a white crystal.

Provenance & Evidence