Straightforward Synthesis of Aromatic Imines from Alcohols and Amines or Nitroarenes Using an Impregnated Copper Catalyst
作者:Juana M. Pérez、Rafael Cano、Miguel Yus、Diego J. Ramón
DOI:10.1002/ejoc.201200319
日期:2012.8
The impregnatedcopper on magnetite catalyst is a versatile system for the synthesis of imines starting fromalcohols and amines. This catalyst does not require any type of expensive and difficult to handle organic ligand or typical transition metals, and provides excellent yields achievable under mild reaction conditions. Moreover, the catalyst is very easy to remove from the reaction medium by simply
A method for forming an imine comprises reacting a first reactant comprising a hydroxyl functionality, a carbonyl functionality, or both a hydroxyl functionality and a carbonyl functionality with a second reactant having an amine functionality in the presence of ordered porous manganese-based octahedral molecular sieves and an oxygen containing gas at a temperature and for a time sufficient for the imine to be produced.
A Pd‐catalyzed carbonylation of α‐chloro ketones in the presence of imines leads to α‐alkylidene β‐oxo amides in good yields. This one‐pot synthetic method is highly stereoselective and affords amides only as (Z) isomers. This work increases the potential of Pd‐catalyzed reactions in the direct synthesis of carbonyl compounds.
Tandem catalysis: Direct catalytic synthesis of imines from alcohols using manganese octahedral molecular sieves
作者:S SITHAMBARAM、R KUMAR、Y SON、S SUIB
DOI:10.1016/j.jcat.2007.11.006
日期:2008.1.25
Tandem processes involving catalysts can offer unique and powerful strategies for converting simple starting materials into more complex products in a single reaction vessel. Imines were synthesized directly from alcohols via a tandem catalytic process using manganese octahedral molecular sieves (OMS-2) as catalyst. The synthesis proceeds through two steps: an oxidation of the alcohols to carbonyls