Harnessing the Power of the Asymmetric Grignard Synthesis of Tertiary Alcohols: Ligand Development and Improved Scope Exemplified by One-Step Gossonorol Synthesis
作者:Saranna E. Kavanagh、Declan G. Gilheany
DOI:10.1021/acs.orglett.0c02629
日期:2020.11.6
A series of N-substituted cyclohexyldiaminophenolic ligands for the asymmetric Grignard synthesis of tertiary alcohols is reported. The 2,5-dimethylpyrrole-decorated ligand led to improved enantioselectivities and broadened the scope of the methodology. As an exemplar, we report an unprecedented highly selective one-step synthesis of gossonorol in 93% ee, also constituting the shortest formal syntheses
报道了用于叔醇的不对称格利雅合成的一系列N-取代的环己基二氨基酚配体。2,5-二甲基吡咯修饰的配体提高了对映选择性,并扩大了方法的范围。作为示例,我们报道了前所未有的高选择性一步合成93%ee中的棉酚的步骤,也构成了天然产物boivinianin B和yingzhaosu C的最短形式合成。