Iron-Catalyzed Regio- and Stereoselective Substitution of γ,δ-Epoxy-α,β-unsaturated Esters and Amides with Grignard Reagents
作者:Takeshi Hata、Rie Bannai、Mamoru Otsuki、Hirokazu Urabe
DOI:10.1021/ol100022w
日期:2010.3.5
When γ,δ-epoxy-α,β-unsaturated esters or amides were treated with 2 equiv of Grignard reagents in the presence of 10−24 mol % FeCl2, regio- and stereoselective substitution of the epoxide moiety with the Grignard reagent occurred to give exclusively δ-hydroxy-γ-alkyl or aryl-α,β-unsaturated esters or amides in good yields.
当在10−24 mol%FeCl 2存在下用2当量的Grignard试剂处理γ,δ-环氧-α,β-不饱和酯或酰胺时,发生了用Grignard试剂对环氧部分进行区域和立体选择性取代仅以高收率得到δ-羟基-γ-烷基或芳基-α,β-不饱和酯或酰胺。