Maleic Anhydride → HCID 21875228, compound
Reaction equation
[NH2:1][C:2]1[C:7]2[N:8]=[C:9]([C:11]([F:14])([F:13])[F:12])[O:10][C:6]=2[CH:5]=[CH:4][CH:3]=1.[C:15]1(=O)[O:20][C:18](=[O:19])[CH:17]=[CH:16]1>C(O)(=O)C>[F:12][C:11]([F:14])([F:13])[C:9]1[O:10][C:6]2[CH:5]=[CH:4][CH:3]=[C:2]([N:1]3[C:18](=[O:19])[CH:17]=[CH:16][C:15]3=[O:20])[C:7]=2[N:8]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
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 min containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). MS (ES): m/z 283.21 [M+H]+.