Synthesis of 2,5-Disubstituted Oxazoles from Arylacetylenes and α-Amino Acids through an I2/Cu(NO3)2•3H2O-Assisted Domino Sequence
作者:Anxin Wu、Jungang Wang、Yan Cheng、Jiachen Xiang
DOI:10.1055/s-0037-1612087
日期:2019.4
5-disubstituted oxazoles from easily available arylacetylenes and α-amino acids in the presence of Cu(NO3)2•3H2O and iodine. This reaction process involves the I2/Cu(NO3)2•3H2O-assisted transformation of arylacetylene to α-iodo acetophenone, Kornblum oxidation to phenylglyoxal, condensation to imine, decarboxylation/annulation/oxidation reaction sequence to approach 2,5-disubstituted oxazoles.
在 Cu(NO3)2•3H2O 和碘的存在下,从容易获得的芳基乙炔和 α-氨基酸合成 2,5-二取代恶唑的新策略已经开发出来。该反应过程包括 I2/Cu(NO3)2•3H2O 辅助芳基乙炔转化为 α-碘苯乙酮、Kornblum 氧化为苯乙二醛、缩合为亚胺、脱羧/环化/氧化反应序列以接近 2,5-二取代恶唑。