Gold-Catalyzed Nitrene Transfer from Benzofuroxans to <i>N</i>-Allylynamides: Synthesis of 3-Azabicyclo[3.1.0]hexanes
作者:Nikolay V. Shcherbakov、Dmitry V. Dar’in、Vadim Yu. Kukushkin、Alexey Yu. Dubovtsev
DOI:10.1021/acs.joc.1c01654
日期:2021.9.17
The gold-catalyzed reaction between benzofuroxans, functioning as nitrene transfer reagents, and N-allylynamides leads to 3-azabicyclo[3.1.0]hexan-2-imines. This highly selective annulation proceeds smoothly under mild conditions (5 mol % Ph3PAuNTf2, PhCl, 60 °C) and exhibits high functional group tolerance (21 examples, ≤96% yields). The obtained cyclopropanated products represent a useful synthetic
用作氮烯转移试剂的苯并呋喃与N-烯丙基酰胺之间的金催化反应生成 3-氮杂双环 [3.1.0] 己-2-亚胺。这种高选择性环化在温和条件下(5 mol% Ph 3 PAuNTf 2,PhCl,60 °C)顺利进行,并表现出高官能团耐受性(21 个例子,≤96% 的产率)。获得的环丙烷化产物代表了一个有用的合成平台,具有易于调节的取代模式,如它们的后修饰所示。金α-亚氨基卡宾中间体的分子内环丙烷化被认为是催化循环的关键步骤。