The alkaline anthraquinone-2-sulfonate-H2O2-catalyzed oxidative degradation of lactose: An improved Spengler-Pfannenstiel oxidation
作者:Henricus E.J. Hendriks、Ben F.M. Kuster、Guy B. Marin
DOI:10.1016/s0008-6215(00)90531-7
日期:1991.8
followed first-order behavior with respect to lactose, D-glucose, or D-galactose. The simultaneous addition of catalytic, equimolar amounts of sodium 2-anthraquinonemonosulfonate and H2O2 showed a pronounced effect on the selectivity. A reaction mechanism for this type of alkali-catalyzed oxidative degradation of carbohydrates is presented and discussed. Lactose could be oxidized up to almost complete conversion
Chemoenzymatic Platform for Synthesis of Chiral Organofluorines Based on Type II Aldolases
作者:Jason Fang、Diptarka Hait、Martin Head‐Gordon、Michelle C. Y. Chang
DOI:10.1002/anie.201906805
日期:2019.8.19
addition and demonstrate engineering of the hydroxyl group stereoselectivity. Our aldolase collection is then employed in the chemoenzymatic synthesis of novel fluoroacids and ester derivatives in high stereopurity (d.r. 80-98 %). The compounds made available by this method serve as precursors to fluorinated analogs of sugars, amino acids, and other valuable chiral building blocks.