Abstract Under moderate conditions aldoenol esters react with HAl (iC 4 H 9) 2 to afford organoaluminium compounds, which upon hydrolysis yield 1, 3-diols and on acetolysis form 1, 3-diacetates. The diacetates are obtained in about 50% yields (based on enol ester) by distillation. Vinyl esters are converted to linear 1, 3-diols or 1, 3-diacetates, whereas enol acetates of higher aldehydes give 2-sec (or-tert) alkyl-1, 3-butanediols or 2-sec (or-tert) ...