Mild and selective hydrolysis of a large range of nitriles leading to carboxylic acids was achieved under neutral conditions by an immobilized and genetically modified enzyme preparation from Alcaligenes faecalis ATCC8750. This immobilized nitrilase has been shown to be an effective catalyst for the stereoselective hydrolysis of mandelonitrile 1a to R-(-)-mandelic acid 1c. This method is particularly
Chemistry by Nanocatalysis: First Example of a Solid-Supported RAPTA Complex for Organic Reactions in Aqueous Medium
作者:Sergio E. García-Garrido、Javier Francos、Victorio Cadierno、Jean-Marie Basset、Vivek Polshettiwar
DOI:10.1002/cssc.201000280
日期:2011.1.17
A ruthenium–arene–PTA (RAPTA) complex has been supported for the first time on an inorganic solid, that is, silica‐coated ferrite nanoparticles. The resulting magnetic material proved to be a general, very efficient and easily reusable catalyst for three synthetically useful organic transformations; selective nitrile hydration, redox isomerization of allylic alcohols, and heteroannulation of (Z)‐enynols