An environmentally friendly and highly active mesoporous Co(II) complex on mesoporous SBA-15 material could be used as an easily recoverable catalyst for the synthesis of α-aminonitriles from a wide range of aldehydes/ketones and primary or secondary amines with good to excellent conversions yields at room temperature under solventless conditions. The catalyst can be recovered by simple filtration and could be reused at least 10 times without loss of catalytic activity.
Ruthenium and Iron‐Catalysed Decarboxylative
<i>N</i>
‐alkylation of Cyclic α‐Amino Acids with Alcohols: Sustainable Routes to Pyrrolidine and Piperidine Derivatives
A modular and waste‐free strategy for constructing N‐substituted cyclic amines via decarboxylative N‐alkylation of α‐amino acids employing ruthenium‐ and iron‐based catalysts is presented. The reported method allows the synthesis of a wide range of five‐ and six‐membered N‐alkylated heterocycles in moderate‐to‐excellent yields starting from predominantly proline and a broad range of benzyl alcohols
Catalyst-free multicomponent Strecker reaction in acetonitrile
作者:Ricardo Martínez、Diego J. Ramón、Miguel Yus
DOI:10.1016/j.tetlet.2005.10.020
日期:2005.12
The multicomponent Strecker reactionusing trimethylsilyl cyanide was accomplished without any type of Lewis acid. The reaction performed in acetonitrile as solvent gave excellent results for any class of aldehydes (aromatic or aliphatic), as well as amines (aromatic or aliphatic). In many cases, α-aminonitrile product was isolated pure after the usual work-up, with quantitative chemical yields. A
Lithium Perchlorate Mediated Three‐Component Preparation of α‐Aminonitriles Under Solvent‐Free Conditions
作者:Najmedin Azizi、Mohammad R. Saidi
DOI:10.1081/scc-120030307
日期:2004.12.31
Abstract A three‐component reaction between aliphatic or aromatic aldehyde, an amine and trimethylsilyl cyanide mediated by solid LiClO4, gave amino nitriles in good to excellent yields. The reaction proceeded smoothly under solvent‐free conditions without any side products.