the first time to synthesize pharmaceutically important α-aminoketonesfrom readily available benzylic secondary alcohols and amines using N-bromosuccinimide. This new reaction proceeds via three consecutive steps involving oxidation of alcohols, α-bromination of ketones, and nucleophilic substitution of α-bromo ketones to give α-aminoketones. Importantly, this novel one-pot greener reaction avoids
NIS-Catalyzed Reactions: Amidation of Acetophenones and Oxidative Amination of Propiophenones
作者:Manjunath Lamani、Kandikere Ramaiah Prabhu
DOI:10.1002/chem.201202703
日期:2012.11.12
Single‐step amination: The N‐iodosuccinimide (NIS)‐catalyzed amidation of acetophenone derivatives by using tert‐butylhydroperoxide (TBHP) as an oxidant is presented. A variety of acetyl derivatives of heterocyclic compounds were easily converted to their corresponding ketoamides under these conditions. A new, NIS‐catalyzed amination of propiophenone and its derivatives in the presence of TBHP to furnish
A two-step continuous synthesis of α-ketoamides and α-amino ketones from 2° benzylic alcohols using hydrogen peroxide as an economic and benign oxidant
A practical two-step synthesis of α-ketoamides and α-amino ketones via direct oxidative coupling between 2° benzylic alcohols and amines was developed. Hydrogen peroxide, an economic and environmentally friendly oxidant, was used, and a metal catalyst was unnecessary. Moreover, the continuous-flow technique was employed to increase the functional group tolerance, efficiency and safety.
Yabuuchi,T., Chemical and pharmaceutical bulletin, 1960, vol. 8, p. 1046 - 1050
作者:Yabuuchi,T.
DOI:——
日期:——
Enantioselective and Diastereoselective Construction of Chiral Amino Alcohols by Iridium–f-Amphox-Catalyzed Asymmetric Hydrogenation via Dynamic Kinetic Resolution
The iridium–f-amphox-catalyzed asymmetric hydrogenation of racemic α-amino β-unfunctionalized ketones proceeds via a DKR (dynamickineticresolution) process for the construction of various chiral N,N-disubstituted α-amino β-unfunctionalized alcohols in quantitative yields with excellent enantioselectivities and diastereoselectivities (all products >99% ee and >99:1 dr, TON up to 100 000). Importantly