Chloramphenicol base chemistry. Part 10 1 : Asymmetric synthesis of α -hydroxy chiral alcohols via intramolecular Michael additions of γ -hydroxy- α , β -unsaturated enones with chloramphenicol base derived bifunctional urea organocatalysts
作者:Haifeng Wang、Linjie Yan、Yan Wu、Fener Chen
DOI:10.1016/j.tet.2017.03.076
日期:2017.5
γ-hydroxy-α, β-unsaturated enones. The oxidation of the resulting products provided facile access to the corresponding α-hydroxy chiral alcohols with good efficiency and enantioselectivity, with the reaction displaying broad substrate scope. The utility of this methodology was further demonstrated by the synthesis of (R)-2-hydroxy-4-phenylbutanoate, which is a key building block for the construction of the ACE
我们已经开发了氯霉素碱脲催化的γ-羟基-α,β-不饱和烯酮的分子内迈克尔加成。所得产物的氧化提供了以良好的效率和对映选择性容易地获得相应的α-羟基手性醇的反应,该反应显示出广泛的底物范围。通过合成(R)-2-羟基-4-苯基丁酸(R)-2-羟基-4-苯基丁酸酯进一步证明了该方法的实用性,这是构建ACE抑制剂盐酸贝那普利的关键组成部分。