作者:Arif Kivrak、Metin Zora
DOI:10.1016/j.tet.2013.12.043
日期:2014.1
A novel synthesis of 1,2,4-oxadiazoles and isoxazoles is described by utilizing the reactions between amidoximes and α,β-alkynic aldehydes and/or ketones. Conjugate addition products, obtained from amidoximes and α,β-alkynic aldehydes and/or ketones, afford 1,2,4-oxadiazoles and isoxazoles when treated with bases and acids, respectively. 1,2,4-Oxadiazoles can also be synthesized directly from amidoximes
通过利用a肟和α,β-炔醛和/或酮之间的反应,描述了1,2,4-恶二唑和异恶唑的新型合成方法。从a胺肟和α,β-炔醛和/或酮获得的共轭加成产物在分别用碱和酸处理时分别得到1,2,4-恶二唑和异恶唑。1,2,4-氧杂二唑也可以在碱性条件下一锅法直接由a胺肟和α,β-炔醛合成。该反应对于各种起始化合物是通用的,并且可以耐受芳基,杂芳基和烷基的存在。