Selective <i>ortho</i>
C−H Cyanoalkylation of (Diacetoxyiodo)arenes through [3,3]-Sigmatropic Rearrangement
作者:Junsong Tian、Fan Luo、Chaoshen Zhang、Xin Huang、Yage Zhang、Lei Zhang、Lichun Kong、Xiaochun Hu、Zhi-Xiang Wang、Bo Peng
DOI:10.1002/anie.201803455
日期:2018.7.16
We herein report a robust catalyst‐free cross‐coupling between ArI(OAc)2 and α‐stannyl nitriles, aided by TMSOTf. The transformation introduces a cyanoalkyl group to the ortho position of ArI(OAc)2 and simultaneously reduces the aryl iodine(III) to iodide, thus providing α‐(2‐iodoaryl) nitrile as the product. This transformation could be completed within 5 min at −78 °C and features superb functional‐group
我们在本文中报告了在TMSOTf的辅助下,ArI(OAc)2与α-锡烷基腈之间的无催化剂交叉偶联。该转化将氰基烷基引入ArI(OAc)2的邻位,同时将芳基碘(III)还原为碘,从而提供α-(2-碘芳基)腈作为产物。此转换可在−78°C下5分钟内完成,并具有出色的功能组容限和有效的可扩展性。DFT计算表明,乙烯酮(芳基)碘鎓中间体的形成和随后的[3,3]-σ重排是关键步骤。