Ruthenium-NHC-Catalyzed Asymmetric Hydrogenation of Flavones and Chromones: General Access to Enantiomerically Enriched Flavanones, Flavanols, Chromanones, and Chromanols
作者:Dongbing Zhao、Bernhard Beiring、Frank Glorius
DOI:10.1002/anie.201302573
日期:2013.8.5
Two to four! Readily available flavones and chromones were efficiently converted into four valuable chiral classes of O‐heterocycles—flavanones, chromanones, flavanols, and chromanols—by means of an enantioselective Ru/NHC‐catalyzed hydrogenation process (see scheme; NHC=N‐heterocyclic carbene, PCC=pyridinium chlorochromate).
二到四!现成的黄酮和色酮通过对映选择性Ru / NHC催化的加氢过程有效地转化为四种有价值的O-杂环手性类别-黄酮,色酮,黄烷醇和色醇-参见表; NHC = N-杂环卡宾, PCC =吡啶鎓氯铬酸盐)。