Highly regioselective dipolar cycloadditions of nitrile oxides with α,β-acetylenic aldehydes
2016
Jiang, Longqiang | Gao, Tao | Li, Zhi | Sun, Shaofa | Kim, Claudia | Huang, Changfeng | Guo, Haibing | Wang, Jian | Xing, Yalan
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.
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