Hydrochloric Acid → HCID 11760869, compound

Participants

Reaction Conditions

Reaction Steps

A solution of m-tolylisocyanate (0.846 g, 6.35 mmol) in dimethylformamide (3 ml) is added to a solution of the salt 3a prepared in Preparation 3 (1.937 g, 5.78 mmol) in dimethylformamide (8 ml). Triethylamine (32 ml) is added at 0° C. The mixture is stirred at 0° C. for 30 minutes and then at room temperature overnight. Water and then 10% hydrochloric acid are added. The mixture is extracted with ethyl acetate. The extract is washed with water and dried (sodium sulfate), and then the solvent is distilled off under reduced pressure. The residue is recrystallized from acetonitrile to obtain the objective compound 4a (1.39 g; yield 62%).

Provenance & Evidence