A Convenient Method for Converting Hydroxyacetophenones into Their Ethylene or Trimethylene Acetals
作者:Tsuneo Sato、Fumiaki Ono、Hirotaka Takenaka、Toshikazu Fujikawa、Masaki Mori
DOI:10.1055/s-0028-1088025
日期:2009.4
Various types of hydroxyacetophenones are efficiently converted into the corresponding ethylene acetals in the presence of ethane-1,2-diol, triisopropyl orthoformate, and a catalytic amount of cerium(III) trifluoromethanesulfonate under mild reaction conditions. The homologous trimethylene acetals can be also prepared in the same way.
多种羟基乙酰苯酮在乙烷-1,2-二醇、三异丙基甲酸酯和少量铈(III)三氟甲磺酸盐的存在下,在温和的反应条件下有效地转化为相应的乙烯醇缩醛。同样的方式也可以制备同系的三亚甲基醇缩醛。