Rhodium(III)-Catalyzed Intermolecular Direct Amination of Aromatic C–H Bonds withN-Chloroamines
摘要:
A Rh(III)-catalyzed direct aromatic C-H amination is achieved using N-chloroamines as a reagent. Furthermore, we also developed a one-pot amination protocol Involving In situ chlorination of the secondary amines. The catalytic amination operates at mild conditions with excellent functional group tolerance and regioselectivity.
Achieving Site Selectivity in Metal-Catalyzed Electron-Rich Carbene Transfer Reactions from <i>N</i>-Tosylhydrazones
作者:Naijing Su、Tianning Deng、Donald J. Wink、Tom G. Driver
DOI:10.1021/acs.orglett.7b01694
日期:2017.8.4
Catalyst control of the site-selectivity of electron-rich alkyl, aryl disubstituted carbenes generated in situ from o-alkenyl-substituted N-tosylhydrazones was achieved in this study. Exposure of these substrates to copper iodide triggered the formation of α-alkoxy 2H-naphthalenones. This investigation established that changing the catalyst to a rhodium(II) carboxylate turned off cyclization and migration
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A new approach to form CN bond without metal catalysis was developed. 4-acetylbenzoyl isocyanate reacted with various amines through a mild method to form CN bond. This reaction was amenable to scale-up and it afforded the corresponding products with good to excellent yields and tolerates a wide range of functional groups.
Synthesis, biological evaluation, and molecular docking study of novel allyl-retrochalcones as a new class of protein tyrosine phosphatase 1B inhibitors
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