Halogen-Bonding Interaction between I<sub>2</sub> and <i>N</i>-Iodosuccinimide in Lewis Base-Catalyzed Iodolactonization
作者:Takahiro Horibe、Yasutaka Tsuji、Kazuaki Ishihara
DOI:10.1021/acs.orglett.0c01735
日期:2020.6.19
The halogen-bonding interaction between I2 and N-iodosuccinimide (NIS) stabilized by a Lewis base (LB) has been explored. 1H NMR, nuclear Overhauser effect (NOE), and diffusion-ordered NMR spectroscopy (DOSY) suggest the generation of a 1:1:1 assembly, LB–I2–NIS. In contrast, when N-iodotrifluoromethanesulfonimide (INTf2) is used instead of NIS, LB–I5+–LB is generated. On the basis of these results
已经研究了I 2和被路易斯碱(LB)稳定的N-碘琥珀酰亚胺(NIS)之间的卤素键相互作用。1 H NMR,核Overhauser效应(NOE)和扩散有序NMR光谱(DOSY)表明生成了1:1:1的组装体LB–I 2 –NIS。相反,当使用N-碘三氟甲烷磺酰亚胺(INTf 2)代替NIS时,会生成LB–I 5 + –LB。基于这些结果并结合密度泛函理论(DFT)计算,我们提出了形成I 2 -NIS以及随后生成活性碘化物种LB-I +的机制。