Development of a New Reaction System for the Synthesis of Highly Optically Active α,γ-Substituted γ-Butyrolactones
作者:Ming-Hua Xu、Wei Wang、Li-Jun Xia、Guo-Qiang Lin
DOI:10.1021/jo0155153
日期:2001.6.1
A highly useful method for the synthesis of optically active alpha,gamma-substituted gamma-butyrolactones has been developed. The SmI(2)-induced reductive coupling of chiral 2-alkyl acrylates derived from isosorbide with ketones in the presence of (1S)-(-)-2,10-camphorsultam as a proton source give the chiral alpha,gamma-substituted gamma-butyrolactones in good yields and high enantiomeric purities
A Highly Efficient Asymmetric Synthesis of Optically Active α,γ-Substituted γ-Butyrolactones Using a Chiral Auxiliary Derived from Isosorbide
作者:Ming-Hua Xu、Wei Wang、Guo-Qiang Lin
DOI:10.1021/ol005978f
日期:2000.7.1
Using an easily accessible and inexpensive chiralauxiliary derived from isosorbide, optically active alpha,gamma-substituted gamma-butyrolactones were obtained in high enantiomeric purity (up to >99% ee for trans) by the SmI(2)-induced reductive coupling of chiral methacrylate 7 with ketones in the presence of (-)-sultam as a proton source.