The Michael reaction of N-cinnamoylazoles with phenols. A simple synthesis of 4-arylchroman-2-ones and 1-arylbenzo[f]chroman-3-ones

4-Arylchroman-2-ones 3 and 1-arylbenzo[f]chroman-3- ones 6 have been prepared in moderate to good yields by reaction of dihydric or trihydric phenols with p-substituted N-cinnamoylazoles in dichloromethane under reflux in the presence of DBU.