Regiocontrolled Rh(III)-catalyzed C C coupling/C N cyclization mediated by distinctive 1,2-migratory insertion of gem‑difluoromethylene allenes: Reaction development and mechanistic insight
作者:Zhi Zhou、Kaifeng Chen、Yi Wang、Xiuhua Zhong、Shuang Lin、Hui Gao、Wei Yi
DOI:10.1016/j.cclet.2022.107849
日期:2023.5
been realized to build the pyridin-2(1H)-one motifs with the embedment of a Z-configured monofluoroalkene functionality, in which either (hetero)aromatic or vinylic amides were found to be compatible. Integrated experimental and computational mechanistic studies revealed that a tandem regioselective allene 1,2-insertion/β-H elimination/hydrogen transfer/oxidative addition/cyclization/cis-β-F elimination
通过开发宝石 -二氟亚甲基丙二烯作为可行的合作伙伴,实现了区域控制 Rh(III) 催化的氧化还原中性 C C 偶联/C N 环化以构建具有Z -嵌入的 pyridin-2(1 H )-one 基序配置的单氟烯烃功能,其中发现(杂)芳族或乙烯基酰胺是相容的。综合实验和计算机制研究表明,串联区域选择性丙二烯 1,2-插入/ β -H 消除/氢转移/氧化加成/环化/顺式- β涉及非常规 Rh(III)-Rh(I)-Rh(III) 催化循环的 -F 消除是已建立转化的原因。通过进一步的 FMO 分析和 IGMH 图, gem-二氟亚甲基部分和 OPiv 部分之间的非共价弱相互作用网络被合理地定义为非常规和特定的区域选择性控制。