Pyridine → 3-n-Butylaminocarbonyloxy-2-(7-chloro-1,8-naphthyridin-2-yl)-5-trifluoromethyl-isoindolin-1-one

Participants

Reaction Steps

Pyridine (10 cc.) and n-butyl isocyanate (11.2 cc.) are added to a suspension of 2-(7-chloro-1,8-naphthyridin-2-yl)-3-hydroxy-5-trifluoromethyl-isoindolin-1-one (3.8 g.) in acetonitrile (380 cc.). The mixture is heated to the reflux temperature and triethylamine (0.5 cc.) is then added. Refluxing is continued for 1 hour and 30 minutes until dissolution. The reaction mixture is then concentrated under reduced pressure (40 mm.Hg), and the residue is recrystallised from acetonitrile (48 cc.) to give 3-n-butylaminocarbonyloxy-2-(7-chloro-1,8-naphthyridin-2-yl)-5-trifluoromethyl-isoindolin-1-one (3.5 g.) melting at 120° C. and then at 176° C.

Provenance & Evidence