Asymmetric epoxidation of 2-arylidene-1,3-diketones: facile access to synthetically useful epoxides
作者:Alessio Russo、Alessandra Lattanzi
DOI:10.1039/c002587a
日期:——
enantioselective epoxidation reaction of acyclic and cyclic 2-arylidene-1,3-diketones is reported. Easily accessible or commercially available α,α-diaryl prolinols as the organocatalysts in the presence of tert-butyl hydroperoxide (TBHP) provide the corresponding epoxides in high to excellent yield (up to 99%) and up to 85% ee (ee >90% after crystallisation). These epoxides are pharmaceutically important
在本文中,报道了无环和环状2-亚芳基-1,3-二酮的第一个对映选择性环氧化反应。在存在下列条件下,容易获得或商购的α,α-二芳基脯氨醇作为有机催化剂叔丁基过氧化氢 (TBHP)以高至极好的收率(高达99%)和高达85%ee(结晶后ee> 90%)提供相应的环氧化物。这些环氧化物是药学上重要的结构单元和中间体,用于合成高密度官能化的环氧化物衍生物。