期刊
ORGANIC LETTERS
卷 19, 期 4, 页码 962-965出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.7b00275
关键词
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资金
- European funding (ERDF)
- European funding (ESF)
- Gobierno Vasco [ELKARTEK_KK-2015/0000101, IT_1033-16]
- UPV/EHU [GIU15/31]
- MINECO [RYC-2012-09873]
Selective bromination reactions of click compounds are described. Electron-neutral and electron-deficient arenes selectively undergo unprecedented Pd-catalyzed C-H ortho-halogenations assisted by simple triazoles as modular directing groups, whereas electron-rich arenes are regioselectively halogenated following an electrophilic aromatic substitution reaction pathway. These C-H halogenation procedures exhibit a wide group tolerance, complement existing bromination procedures, and represent versatile synthetic tools of utmost importance for the late-stage diversification of click compounds. The characterization of a triazole-containing palladacyde and density functional theory studies supported the mechanism proposal.
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