An efficient protocol for the synthesis of six-membered N, O-heterocycles via a 1,3-dipolar (3+3) cycloaddition between nitrile oxide and α-diazo esters
作者:Bharath Kumar Kuruba、Samuel Vasanthkumar
DOI:10.1016/j.tet.2017.05.055
日期:2017.7
In this manuscript, we are reporting an efficient protocol for the construction of highly functionalized N, O-heterocyclic derivatives such as 1,2,4-oxadiazine and 1,4,2-dioxazine-6-carboxylate derivatives via a 1,3-dipolar (3 + 3) cycloaddition between nitrile oxide and unprotected α-diazo esters in the presence of 2 mol% Cu(OTf)2 catalyst. The expected N, O-heterocycles were obtained in excellent
在这份手稿中,我们报告了一种有效的方案,可通过1,3-构筑高度官能化的N,O-杂环衍生物,例如1,2,4-恶二嗪和1,4,2-二恶嗪-6-羧酸酯衍生物在2 mol%Cu(OTf)2催化剂存在下,丁腈与未保护的α-重氮酯之间进行偶极(3 + 3)环加成。以优异的产率获得了预期的N,O-杂环。已知这些N,O-杂环具有杀虫和杀螨特性。