Methyl iodide → HCID 59547208, compound

Participants

Reaction Steps

To a solution of 3H-benzo[b]1,2,3-triazino[4,5-d]selenophen-4-one (200 mg, 0.8 mmol) in acetone (50 mL) was added sequentially potassium carbonate (400 mg, 1.6 mmol), iodomethane (0.1 mL, 0.9 mmol) and a catalytic amount of PEG-400 was added at rt and the mixture was stirred at rt for 16 h. The solution was filtered and the solids were washed with acetone. Acetone was evaporated under reduced pressure and the residue was chromatographed over silica gel column using hexane-chloroform (70:30) as eluents to give the product as a off-white solid (120 mg, 47%), mp 190-192° C. IR (neat) νmax 3431, 1673, 1220, 1021 cm−1; 1H NMR (400 MHz, CDCl3): δ 8.56-8.58 (1H, m, H-9), 7.98-8.01 (1H, m, H-6), 7.58-7.66 (2H, m, H-7,8), 4.13 (3H, s, —NCH3); 13C NMR (100 MHz, CDCl3): δ 155.5, 152.8, 142.3, 135.3, 130.4, 129.8, 126.4, 126.2, 126.0, 37.8; LC-MS (positive ion mode): m/z 286, 288 (M+Na)+.

Provenance & Evidence