An Efficient Oxidative Conversion of Aldehydes into 2-Substituted 2-Oxazolines Using 1,3-Diiodo-5,5-dimethylhydantoin
作者:Hideo Togo、Shogo Takahashi
DOI:10.1055/s-0029-1216843
日期:2009.7
Various aromatic and aliphatic aldehydes were converted into the corresponding 2-aryl and 2-alkyl-2-oxazolines, respectively, in good to high yields by reaction with 2-aminoethanol and 1,3-diiodo-5,5-dimethylhydantoin. Moreover, chiral bis-2-oxazolines, which can be used as chiral ligands in asymmetric synthesis, could be also prepared in moderate yields by the reaction of dialdehydes with (R)-(-)-2-phenylglycinol
通过与2-氨基乙醇和1,3-二碘-5,5-二甲基乙内酰脲反应,各种芳族和脂肪族醛分别以良好或高产率分别转化为相应的2-芳基和2-烷基-2-恶唑啉。此外,还可以通过在相同条件下使二醛与(R)-(-)-2-苯基甘氨醇反应,以中等收率制备可用作不对称合成中的手性配体的手性双-2-恶唑啉。 2-芳基-2-恶唑啉-2-烷基-2-恶唑啉-1,3-二碘-5,5-二甲基乙内酰脲-醛-2-氨基乙醇-手性恶唑啉