Selective Anti-Markovnikov Cyclization and Hydrofluorination Reaction in Superacid HF/SbF5: A Tool in the Design of Nitrogen-Containing (Fluorinated) Polycyclic Systems
摘要:
The selective synthesis of tetrahydroquinolines and fluorinated arylamines was performed in superacid HF/SbF5 through a superelectrophilic ammonium-carbenium activation process. This anti-Markovnikov oriented reaction was applied to the straightforward synthesis of highly valued (fluorinated) nitrogen-containing heterocyclic compounds.
Mono-nitration of aromatic compounds via their nitric acid salts
作者:Pingsheng Zhang、Miall Cedilote、Thomas P. Cleary、Michael E. Pierce
DOI:10.1016/j.tetlet.2007.10.027
日期:2007.12
Aromatic compounds bearing a basic nitrogen atom can be converted to the corresponding nitricacid salts. Mono-nitration of the compounds can be carried out by adding a dichloromethane solution of the salts to sulfuric acid, or by adding acetyl chloride (or trifluoroacetic anhydride) to a dichloromethane solution of the salts. This protocol provides, among other benefits, the most convenient and reliable