Air-stable Bis(pentamethylcyclopentadienyl) Zirconium Perfluorooctanesulfonate as an Efficient and Recyclable Catalyst for the Synthesis of N-substituted Amides
Bis(pentamethylcyclopentadienyl) zirconium perfluorooctanesulfonate is an air‐stable and water‐tolerant Lewis acid. This complex exhibited good thermal stability and high solubility in polar organic solvents. The compound showed relatively strong acidity, with an acid strength of 0.8
Gold Catalysis: Alkyl Migration in the Addition of Alcohols to Nitriles
作者:Nada Ibrahim、A. Stephen K. Hashmi、Frank Rominger
DOI:10.1002/adsc.201000779
日期:2011.2.11
symmetrical ethers and/or N-substituted carboxylic amides. While with most phosphane ligands tested, the dominating product is always the ether, with the trimesitylene ligand the amides are the major products. The reaction conditions are much milder than those reported previously. Mechanistic control experiments with a chiral alcohol prove the intermediacy of carbenium ions, furtherstudies with not readily
Decarboxylative Ritter-Type Amination by Cooperative Iodine (I/III)─Boron Lewis Acid Catalysis
作者:Rok Narobe、Kathiravan Murugesan、Simon Schmid、Burkhard König
DOI:10.1021/acscatal.1c05077
日期:2022.1.7
intermediates also on electronically disfavored benzylic positions. The unusually high reactivity of the system stems from a complexation of iodine (III) intermediates with BF3. The synthetic utility of our decarboxylative Ritter-type amination protocol has been demonstrated by the functionalization of benzylic as well as aliphatic carboxylic acids, including late-stage modification of different pharmaceutical
Treatment of secondary sulphinamides (), bearing one hydrogen atom at α-carbon to nitrogen, with electrophilic reagents leads in some cases to formation of N-sulphenylimines (), via a Pummerer-like reaction.