Facile one-pot preparation of 5-aryltetrazoles and 3-arylisoxazoles from aryl bromides
作者:Eiji Kobayashi、Hideo Togo
DOI:10.1016/j.tet.2018.06.044
日期:2018.8
The successive treatment of aryl bromides with n-BuLi, DMF, hydroxylamine hydrochloride, and finally diphenylphosphoryl azide provided efficiently the corresponding 5-aryltetrazoles in good to moderate yields. Similarly, the successive treatment of aryl bromides with n-BuLi, DMF, hydroxylamine hydrochloride, and finally diethyl acetylenedicarboxylate and Oxone® provided efficiently the corresponding
用正丁基锂,二甲基甲酰胺,盐酸羟胺和最后的二苯基磷酰基叠氮化物连续处理芳基溴化物,可以有效地提供相应的5-芳基四唑,并具有良好至中等的收率。类似地,与芳基溴化物的连续处理Ñ正丁基锂,DMF,盐酸羟胺,最后丁炔二酸二甲酯和过硫酸氢钾®有效地提供良好的对应的二乙基3-芳基异恶唑-4,5-二羧酸酯至适中的产率。芳族醛肟是这两个反应的关键中间体,在无过渡金属条件下,一锅中可从芳基溴化物中获得5-芳基四唑和3-芳基异恶唑。