Asymmetric Synthesis of 1-Heteroaryl-1-arylalkyl Tertiary Alcohols and 1-Pyridyl-1-arylethanes by Lithiation–Borylation Methodology
作者:Charlotte G. Watson、Varinder K. Aggarwal
DOI:10.1021/ol400289v
日期:2013.3.15
The synthesis of highly enantioenriched α-heterocyclic tertiary alcohols has been achieved via lithiation–borylation of a configurationally stable lithiated carbamate and heterocyclic pinacol boronic esters followed by oxidation. Protodeboronation of the α-heterocyclic tertiary boronic esters using TBAF·3H2O or CsF gave highly enantioenriched 1-pyridyl-1-arylethanes in high er.
高度对映体富集的α-杂环叔醇的合成是通过对构型稳定的锂化氨基甲酸酯和杂环频哪醇硼酸酯进行锂化-硼化,然后进行氧化来实现的。使用TBAF·3H 2 O或CsF对α-杂环叔硼酸酯进行原硼酸脱硼,可以得到较高对映体含量的高对映体富集的1-吡啶基-1-芳基乙烷。