α,α,α-Trifluoroacetophenone (2), which is susceptible to noncatalytic reduction by BH3, could be reduced to chiral alcohol up to 90% ee by using electronically tuned-CBS catalyst (1) with BH3. The enantioselectivities highly correlated with the differential orbital energies between 1–BH3 adduct and 2, which were calculated by DFT method.
α,α,α-三
氟乙酰苯(2),该物质易受
BH3非催化还原,可通过使用电子调谐
CBS催化剂(1)与 反应,将其还原为手性醇,最高可达90%的ee值。通过DFT方法计算,其对映选择性与1– 加合物和2之间的轨道能量差异高度相关。