Room-temperature synthesis of enantioenriched non-protected cyanohydrins using acetone cyanohydrin as the cyanide source was achieved by V(salalen) catalyst. Aliphatic aldehydes underwent the cyanation with 89–95% ee in the presence of only 0.2–0.4 mol% catalyst. Aromatic cyanohydrins were also obtained in high enantiomeric excesses under modified conditions.
利用V(salalen)催化剂,通过以
丙酮氰醇作为
氰源,实现了室温下合成手性富集的非保护
氰醇。在仅使用0.2–0.4摩尔%催化剂的情况下,脂肪醛进行
氰化反应,得到89–95% ee的手性富集产物。在经过改良的条件下,也可获得高对映体过量值的芳香族
氰醇。