A stereoselective synthesis of pyruvic 4,6-acetals of d-hexopyranose residues
作者:Gerald O. Aspinall、Ibrahim H. Ibrahim、Naveen K. Khare
DOI:10.1016/0008-6215(90)84195-z
日期:1990.4
Abstract A stereoselectivesynthesis of pyruvic 4,6-acetals in their naturally occurring configurations on α- d -glucopyranose, α- d -mannopyranose, and β- d -galactopyranose residues is based on the preferential formation of 4,6-[1-(3,4-dimethoxyphenyl)ethylidene] acetals bearing equatorial methyl groups. 2,3-Di- O -acyl derivatives of these acetals are oxidized with ruthenium tetraoxide to yield