O-Phenylenediamine → 4,4-Dimethyl-4H-5-oxa-1,3-dithia-6,11-diaza-cyclopenta[a]anthracen-2-one

Participants

Reaction Steps

4,4-Dimethyl-4H-[1,3]dithiolo[4,5-c]pyran-2,6,7-trione (5) (150 mg, 0.65 mmol), o-phenylenediamine (75 mg, 0.65 mmol) and montmorillonite KSF (100 mg) were mixed in a mortar until a homogeneous solid was obtained then the solid mixture was transferred into a test tube and irradiated with microwaves for 4 min. The resulting mixture was purified by chromatography (silica gel, CH2Cl2) to give pure 4,4-dimethyl-4H-5-oxa-1,3-dithia-6,11-diaza-cyclopenta[a]anthracen-2-one (7). Yield: 90 mg (45%).

Provenance & Evidence