Preparation of different amides via Ritter reaction from alcohols and nitriles in the presence of silica-bonded N- propyl sulphamic acid (SBNPSA) under solvent-free conditions
of methods have been proposed for the modification of the Ritterreaction. However, many of these methods involve the use of strongly acidic conditions, stoichiometric amounts of reagents, harsh reactionconditions and extended reaction times. Therefore, the development of mild, efficient, convenient and benign reagents for the Ritterreaction is desirable. In this research, we have developed a clean
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.
Rapid Vortex Fluidics: Continuous Flow Synthesis of Amides and Local Anesthetic Lidocaine
作者:Joshua Britton、Justin M. Chalker、Colin L. Raston
DOI:10.1002/chem.201501785
日期:2015.7.20
on multigram scales. Amide synthesis under flow was also extended to a total synthesis of local anesthetic lidocaine, with sequential reactions carried out in two serially linked VFD units. The synthesis could also be executed in a single VFD, in which the tandem reactions involve reagent delivery at different positions along the rapidly rotating tube with in situ solvent replacement, as a molecular
A metal-free photocatalytic Ritter-type C–H amination of diarylmethanes using O2 as an oxidant has been developed using a co-catalytic system of DDQ and TBN and offers a low cost, sustainable way to synthesise secondary amides under mild conditions.