HCID 23319622, compound → HCID 13575823, compound

Participants

Reaction Steps

The above product from part (a) (2.2 g, 0.0058 mole) was refluxed in acetic acid (20 ml) for 9 hours. After cooling, the resultant precipitate was collected by filtration and recrystallized from acetic acid-DMSO to afford 1.38 g (73.8%) of spiro[pyrrolidine-3,2'-pyrrolo[3,2,1-kl]phenothiazine]-1',2,5-(2'H)-trione, mp. above 300° C.

Provenance & Evidence