Regioselective Aromatic Perfluoro-<i>tert</i>-butylation Using Perfluoro-<i>tert</i>-butyl Phenyl Sulfone and Arynes
作者:Zhiqiang Wei、Lixian Wen、Kaidi Zhu、Qian Wang、Yanchuan Zhao、Jinbo Hu
DOI:10.1021/jacs.2c10479
日期:2022.12.7
synthetic protocol to realize aromatic perfluoro-tert-butylation. The key to the success is the identification of PFtB phenyl sulfone as a new source of PFtB anion, which reacts with arynes in a highly regioselective manner to afford perfluoro-tert-butylated arenes in high yields. The application of the method is demonstrated by the preparation of sensitive 19F-labeled NMRprobes with an extraordinary resolving
BINAP-based palladium(0) catalysts in the reaction of 7-methoxy-1,2-didehydronaphthalene (2) and dimethyl acetylenedicarboxylate (DMAD) affords non-racemic 9,12-dimethoxypentahelicene 1 with reasonable ees, among other cycloaddition products. This is the first example of an enantioselective, metal-catalyzed cycloaddition involving arynes.
has been developed. This method allows the synthesis of substituted and polycyclic o-diiodoarenes, which are difficult to obtain by classical methods. This diiodination process involves the formal insertion of arynes into the I–I σ-bond.