用四氟化硫处理(+)-L-酒石酸二甲酯(I)导致形成中间体2-氟-1,2-双(甲氧基羰基)乙基氟亚硫酸盐(II),该中间体在氟化氢的作用下,存在于反应混合物中的化合物被转化为(-)(2S:3S)-2-氟-3-羟基琥珀酸二甲酯(III)。后者与SF 4的反应产生了内消旋2,3-二氟琥珀酸二甲酯(IV)。通过1 H和19 F NMR确定获得的化合物的结构和构型。在过量氟化氢的存在下,用四氟化硫处理(+)-L-酒石酸二甲酯(I),以96%的收率得到了Meso-2,3-二氟琥珀酸二甲酯。
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.