Organocatalytic asymmetric 1,4-addition of organoboronic acids to γ-hydroxy α,β-unsaturated aldehyde: facile synthesis of chiral β-substituted γ-lactones
作者:Sung-Gon Kim
DOI:10.1016/j.tetlet.2008.08.025
日期:2008.10
Catalytic asymmetric 1,4-addition of arylvinyl- and arylboronic acids to a γ-hydroxy α,β-unsaturated aldehyde, which affords β-substituted γ-lactols, has been established using a diarylprolinol silyl ether as an organocatalyst. The β-substituted γ-lactols have been obtained in good yields and with up to 91% ee, which lead to chiral β-substituted γ-lactones followed by oxidation.
已经使用二芳基脯氨醇甲硅烷基醚作为有机催化剂建立了芳基乙烯基和芳基硼酸到γ-羟基α,β-不饱和醛的催化不对称的1,4-加成,该醛提供了β-取代的γ-内酯。β-取代的γ-内酯已经以良好的产率获得并且具有高达91%的ee,其导致手性β-取代的γ-内酯随后被氧化。