Conversion of acetaldehyde into ethyl acetate in presence of aluminium ethoxide is called 

Aldehydes having alpha- H atom, when treated with aluminium ethoxide ( in place of NaOH or KOH), undergo Cannizzaro type of reaction with a difference that the product isolated is an ester rather than salt of acid or alcohol. Such reaction in called Tischenko reaction. 
$\underset{\mathrm{Acetaldehyde} }{2{\mathrm{CH}}_3\mathrm{CHO}}\stackrel{\mathrm{Al}{\left({\mathrm{OC}}_2{\mathrm{H}}_5\right)}_3}{\to }\left[{\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\right]\to \underset{\mathrm{Etylacetate}}{{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5}$