Azoles and azines: CXXVIII. Reaction of 2-aryl-4-hydroxy-6H-1,3-thiazin-6-ones with 6-bromo-4-oxo-4H-chromene-3-carbaldehyde

Chemistry and application of 4-oxo-4H-1-benzopyran-3-carboxaldehyde

“…148 The compound 172 is also formed from 1 and 3-bromo-4-hydroxycoumarin (1:2 molar ratio) in MeOH-pyridine under reflux. 150 Shutov et al 151 have rectified their earlier report 152 …”