Study on the 1,3-dipolar cycloaddition reaction of 4-ethoxy-1,1,1-trifluoro-3-buten-2-one with nitrile oxides
作者:Huiling Jiang、Weimin Yue、Huihong Xiao、Shizheng Zhu
DOI:10.1016/j.tet.2006.12.059
日期:2007.3
1,3-Dipolar cycloaddition (1,3-DC) reaction of 4-ethoxy-1,1,1-trifluoro-3-buten-2-one 1 with nitrile oxides was studied. It was found that besides its CC participating in the formation of isoxazole rings, trifluoromethyl activated CO also underwent 1,3-DC reaction with nitrile oxides to afford 1,4,2-dioxazole rings. Single crystal diffraction analysis also evidenced the diheterocyclic configuration
研究了4-乙氧基-1,1,1-三氟-3-丁烯-2-one 1与腈氧化物的1,3-偶极环加成反应(1,3-DC)。已经发现,除了其CC参与异恶唑环的形成之外,三氟甲基活化的CO还与腈氧化物进行1,3-DC反应以提供1,4,2-二恶唑环。单晶衍射分析也证明了二杂环构型。