Broadly Applicable Ion Pair-Assisted Nucleophilic Substitution of sp<sup>3</sup>-Carbon Electrophiles with Alkynyltrifluoroborates
作者:Shiwen Liu、Cláudio F. Tormena、Gerald B. Hammond、Bo Xu
DOI:10.1021/acs.orglett.2c02507
日期:2022.9.2
smoothly with a wide range of sp3-carbon electrophiles, including propargyl methanesulfonates and unactivated alkyl triflates, to give Sonogashira-type products, via a novel ion pair-assisted nucleophilic substitution mechanism. An ion pair–organic complex, investigated using computational chemistry and in situ NMR experiments, may play a crucial role in this reaction.
炔基三氟硼酸盐亲核试剂通过新的离子对辅助亲核取代机制与多种sp 3 -碳亲电子试剂(包括甲磺酸炔丙酯和未活化的三氟甲磺酸烷基酯)顺利反应,生成 Sonogashira 型产物。使用计算化学和原位核磁共振实验研究的离子对-有机复合物可能在该反应中发挥关键作用。