Asymmetric biomimetic oxidations of phenols: the mechanism of the diastereo- and enantioselective synthesis of dehydrodiconiferyl ferulate (DDF) and dehydrodiconiferyl alcohol (DDA)
作者:Marco Orlandi、Bruno Rindone、Giorgio Molteni、Petteri Rummakko、Gösta Brunow
DOI:10.1016/s0040-4020(00)00944-3
日期:2001.1
Stereoselective bimolecular radical coupling of enantiopure phenylpropenoidic phenols are described, starting from enantiopure amidic derivatives of ferulic acid. The latter were prepared from ferulic acid by reaction with (S)-alanine or Oppolzer camphor sultam. The oxidation step was performed both enzymatically (HRP/H2O2) and chemically (Ag2O). The observed enantioselectivity in the oxidation step
描述了对映体纯的丙烯丙烯基酚的立体选择性双分子自由基偶联,其起始于阿魏酸的对映体纯的酰胺衍生物。后者由阿魏酸通过与(S)-丙氨酸或Oppolzer樟脑sultam反应制得。氧化步骤既可以通过酶促(HRP / H 2 O 2)进行,也可以通过化学方法(Ag 2 O)进行。在氧化步骤中观察到的对映选择性范围为65-84%,与在PM3浓度下对醌甲基化物中间体的构象分析相一致。