Dimethylformamide → HCID 22131317, compound

Participants

Reaction Steps

2-propanesulfonamide (4.40 g) was combined with THF (150 ml) and then dimethylformamide (40 ml) and sodium hydride (2.1 g) were added and the mixture stirred two hours at room temperature. To the mixture was added 3,4-dichlorophenyl isocyanate (7.52 g) in THF (50 ml) and the mixture stirred overnight. The solvent was removed under vacuum, water was added and the mixture filtered. The filtrate was evaporated and then more water introduced when crystals did not form. The solution was made acidic and stirred overnight. The precipitated solid was recovered by filtration. Recrystallization from toluene provided 4.9 g of product with a melting point 151°-4° C.

Provenance & Evidence