Hydrochloric Acid → 1,2-Dihydro-N-(2,4-difluorophenyl)-1-oxopyrrolo[3,2,1-kl]phenothiazine-2-carboxamide

Participants

Reaction Steps

To a suspension of sodium hydride (0.14 g) in DMF (10 ml) was added pyrrolo[3,2,-1kl]phenothiazine-1-one (0.48 g) and to the resulting solution was slowly added 2,4-difluorophenyl isocyanate (0.31 g) . The reaction mixture was stirred for 12 hours and then poured onto ice water (50 ml). The resulting mixture was acidified to pH 2.0 with 6N HCl and the precipitated solid was collected and then air dried-to yield the title compound (2.84 g). A sample recrystallized from methylene chloride had a m.p. of 208°-209° C.

Provenance & Evidence