(+/-)-2a,5-Dihydropyrrolo[4,3,2-de]quinoline-2,4(1H,3H)-dione → Pyrrolo[4,3,2-de]quinoline-2,4(1H,5H)-dione

Participants

Reaction Steps

A mixture of (±)-2a,5-dihydropyrrolo[4,3,2-de]quinoline-2,4(1H,3H)-dione from Step C (200 mg, 1.06 mmol), and manganese (IV) oxide (185 mg, 2.13 mmol) was heated in toluene (3 mL) at 110° C. for 1 h. The mixture was filtered through a pad of Celite, washing with CH2Cl2:MeOH, and the filtrate was concentrated in vacuo to give the title compound. MS: m/z=187 (M+1).

Provenance & Evidence