Maleic Anhydride → HCID 21875228, compound

Participants

Reaction Steps

Compound 476B (0.500 g, 2.48 mmol) was dissolved in acetic acid (10 mL) and maleic anhydride (0.267 g, 2.72 mmol) was added. The mixture was heated at reflux for 3 h, cooled and the solvent removed in vacuo to give a tan solid. The crude product was purified by flash chromatography on silica gel eluting with 2% MeOH/CH2Cl2 to give compound 476C (0.40 g, 57%) as an off-white solid. HPLC: 89.7% at 2.38 min (retention time) (YMC S5 ODS column, 4.6×50 mm, eluting with 10-90% aqueous methanol over 4 mincontaining 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). MS (ES): m/z 283.21 [M+H]+.

Provenance & Evidence