Mn-Catalyzed oxidative amination of benzylic C(sp3)–H bonds with nitriles is disclosed, which enables the synthesis of a broad range of secondary amides in moderate to excellent yields under mild conditions. The interaction between Mn(III) and DDQ facilitates the oxidation and makes it highlyefficient and selective.
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
Bis-Sulfamyl Imines: Potent Substrates for Asymmetric Additions of Arylboroxines under Rhodium Catalysis
作者:Rosemary Crampton、Simon Woodward、Martin Fox
DOI:10.1002/adsc.201000838
日期:2011.4.18
Bis‐sulfamyl imines are shown to be potentially ideal substrates for rhodium‐catalysed asymmetricadditions of arylboron nucleophiles as they show: (i) near perfect enantioselectivities (11 examples, 98–99+% ee), (ii) good to excellent diastereoselectivities (10–32:1 rac:meso), and (iii) high functional group tolerance in removal of the low molecular weight protecting group via mild heating in aqueous