Chemoselective organocatalytic aerobic oxidation of primary amines to secondary imines.

Non-nanogold catalyzed aerobic oxidation of secondary amines to imines.

Bulk gold powder (approximately 10(3) nm particle size) is a highly active catalyst for the oxidative dehydrogenation of secondary amines to imines under the mild conditions of 1 atm O2 and 60-100 degrees C.

Chemoselective metal-free aerobic alcohol oxidation in lignin.

An efficient organocatalytic method for chemoselective aerobic oxidation of secondary benzylic alcohols within lignin model compounds has been identified. Extension to selective oxidation in natural lignins has also been demonstrated. The optimal catalyst system consists of 4-acetamido-TEMPO (5 mol %; TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) in combination with HNO3 and HCl (10 mol % each)...

An aerobic, organocatalytic, and chemoselective method for Baeyer-Villiger oxidation.

Silver nanoparticles supported on alumina--a highly efficient and selective nanocatalyst for imine reduction.

Silver nanoparticles supported on alumina were prepared and tested in the catalytic reduction of various imines to primary and secondary amines and were shown to be exceptionally active and chemoselective. Furthermore, the catalytic activity of the prepared nanocatalyst was also tested in the synthesis of secondary amines from primary amines in a tandem reaction protocol (oxidation-imination-re...

Chemoselective N-tert-butoxycarbonylation and N-formylation of Amines by B(OSO3H)3/SiO2 as an Efficient Heterogeneous and Recyclable Catalyst

A simple, efficient, and cost-effective procedure for the N-tert-butoxycarbonylation and N-formylation of amines (primary, secondary) respectively, with di-tert-butyl dicarbonate and 85% aqueous formic acid under solvent-free condition using B(OSO3H)3/SiO2 (SBSA) as a heterogeneous and recyclable catalyst has been developed. We demonstrated that the resulting catalyst is applicable to various a...