A solution of 1 gram-equivalent of 6-hydroxyflavanone in equivalent of 0.5 N
ethanolic NaOH is evaporated, the residue is dissolved in 200 ml of DMF and
the solution is heated to 150°C; a solution of g-eguivalent of 1-chloro-1-
phenyl-3-dimethylaminopropane in 50 ml of DMF is added, while stirring. The
mixture is stirred for 1.5 hours at 150°C and 6-(1-phenyl-3-
dimethylaminopropoxy)flavonone is precipitated by adding water.
