Flavones. 2. Synthesis and structure-activity relationship of flavodilol and its analogs. A novel class of antihypertensive agents with catecholamine depleting properties
Synthesis of flavodilol (3), as shown in Scheme I, represents a typical example of the general synthesis of flavonoxypropanolamines 2. The Kostanecki reaction of resacetophenone (43), sodium benzoate, and benzoic anhydride failed to give 7- hydroxyflavone (44, R= H) in satisfactory yield as was claimed in the original work;" the major product in this reaction was 7-hydroxy-3-benzoylflavone (17). An alternative method ...