Copper-Mediated Remote C–H Bond Chalcogenation of Quinolines on the C5 Position
摘要:
An efficient and convenient method is developed for the remote C-H bond chalcogenation of 8-aminoquinoline scaffolds on the C5 position that is geometrically inaccessible. The protocol makes use of inexpensive CuBr2 as mediator and shows good tolerance toward numerous disulfides/diselenides and aliphatic amides, giving the corresponding products in good to excellent yield.
Visible-Light-Driven Halogen-Bond-Assisted Direct Synthesis of Heteroaryl Thioethers Using Transition-Metal-Free One-Pot C–I Bond Formation/C–S Cross-Coupling Reaction
involves two sequential reactions in a single pot where the formation of the iodinated heteroarene is followed by a transition-metal-free C–S coupling reaction. A wide range of heteroarene and thiol partners (including aliphatic thiols) have been used for the synthesis of thioethers. NMR studies and DFT calculations revealed the presence of a halogen bond between the thiolateanion (halogen bond acceptor)
Copper-Catalyzed C5–H Sulfenylation of Unprotected 8-Aminoquinolines Using Sulfonyl Hydrazides
作者:Qing Yu、Yiming Yang、Jie-Ping Wan、Yunyun Liu
DOI:10.1021/acs.joc.8b01658
日期:2018.9.21
unprotected 8-aminoquinolines and sulfonyl hydrazides is achieved via the catalysis of CuI. The reactions are hypothesized to proceed via the Cu(I)–Cu(II)–Cu(I) catalytic processes induced by aerobic oxidation and single-electron transfer on the Cu(II)–8-aminoquinoline complex. This work discloses an unprecedented step-efficient method for the synthesis of C5-sulfenylated 8-aminoquinolines bearing a useful free
An atom-economical and regioselective metal-free C-5 chalcogenation of 8-aminoquinolines under mild conditions
作者:Vipin Kumar、Klaus Banert、Devalina Ray、Biswajit Saha
DOI:10.1039/c9ob02235j
日期:——
A general and simple metal-free protocol for expedient C–H functionalization leading to the regioselective generation of C-5 chalcogenated 8-aminoquinoline analogues in up to 90% yield at room temperature (25 °C) has been established. This methodology is an eco-friendly approach to the atom-economical utilization of diaryl/dialkyl chalcogenides for direct access to chalcogenated quinolines and is scalable
An efficient and convenient method is developed for the remote C-H bond chalcogenation of 8-aminoquinoline scaffolds on the C5 position that is geometrically inaccessible. The protocol makes use of inexpensive CuBr2 as mediator and shows good tolerance toward numerous disulfides/diselenides and aliphatic amides, giving the corresponding products in good to excellent yield.