Highly regioselective dipolar cycloadditions of nitrile oxides with α,β-acetylenic aldehydes
作者:Longqiang Jiang、Tao Gao、Zhi Li、Shaofa Sun、Claudia Kim、Changfeng Huang、Haibing Guo、Jian Wang、Yalan Xing
DOI:10.1016/j.tetlet.2016.01.019
日期:2016.2
1,2-Oxazol derivatives 3 were prepared by a highly regioselective 1,3-dipolar cycloaddition of nitrile oxides and α,β-acetylenicaldehydes 1 in good yields. Reactive nitrile oxides were generated in situ from stable chloro-oxime reagents 2 and triethyl amine. The cycloaddition reaction showed broad substrate scope and good functional group compatibility.
-1,2-恶唑衍生物3由腈氧化物和α的高度选择性1,3-偶极环加成制备,β-acetylenicaldehydes 1以良好的收率。由稳定的氯代肟试剂2和三乙胺原位生成反应性一氧化氮。环加成反应显示出较宽的底物范围和良好的官能团相容性。