Chiral Lithium Amido Aryl Zincates: Simple and Efficient Chemo‐ and Enantio‐Selective Aryl Transfer Reagents
作者:Pauline Chaumont‐Olive、Mathieu Rouen、Gabriella Barozzino‐Consiglio、Amel Ben Abdeladhim、Jacques Maddaluno、Anne Harrison‐Marchand
DOI:10.1002/anie.201813510
日期:2019.3.4
An enantioselective aryl transfer is promoted using chiral tricoordinated lithium amido aryl zincates that are easily accessible reagents and whose chiral appendage is simply recovered for reuse. The arylation reaction is run in good yields (60 % average on twenty substrates) and high enantiomeric excesses (95 % ee average). This occurs whatever the ortho, meta, or para substituent borne by the substrate
使用手性三配位的酰胺基芳基锂锌酸盐手性试剂可以促进对映选择性的芳基转移,该手性试剂容易获得,其手性附属物可以简单地回收再利用。芳基化反应以高收率(在二十种底物上平均60%)和高对映体过量(95% ee平均)进行。无论底物携带的邻位,间位或对位取代基如何发生,并且相对于醛官能团观察到完全的化学选择性。敏感的基团(例如腈,酯,酮和可松解的底物)可抵抗被测试剂的作用,从而为该方法提供了广阔的前景。