Spiro asymmetric induction. 3. Synthesis of optically pure syn- or anti-.alpha.,.beta.-dihydroxy esters by the aldol condensation of chiral glycolate enolates
Spiro asymmetric induction. 3. Synthesis of optically pure syn- or anti-.alpha.,.beta.-dihydroxy esters by the aldol condensation of chiral glycolate enolates