Abstract Triethylaluminum and 1, 1-dialkylethylene oxides yield as major products (after hydrolyses) substituted neopentyl alcohols. Triethylaluminum and propylene oxide react (mole ratio> 1) forming 2-methylbutanol in high (ca. 98%) yield. The products of this reaction are dependent on the mole ratio of reactants. When the ratio (triethylaluminum/propylene oxide) is 0.7, 2-pentanol is the major product. The products of reaction with cis-and trans-2 ...