(A) Benzoin condensation When an ethanolic solution of benzaldehyde is heated with strong alkali like KCN or NaCN, we get benzoin. 
(B) Formation of phenolphthalein When phenol is reated with phthalic anhydride in the presence of concentrated H2SO4, it gives phenolphthalein, an indicator. 
(C) Fries rearrangement Phenyl benzoate when heated with anhydrous AlCl3 in the presence of inert solvent gives ortho-and para-hydroxybenzophenone. In this rearrangement, there is a benzoyl group migration from the phenolic oxygen to an ortho-and para-position. 
(D) Methylsalicylate 
(A chief constituent of oil of wintergreen)