Expedient Pathway into Optically Active 2-Oxopiperidines
作者:Sebastiaan Bas A. M. W. van den Broek、Peter G. W. Rensen、Floris L. van Delft、Floris P. J. T. Rutjes
DOI:10.1002/ejoc.201000587
日期:2010.10
The piperidine ring system is one of the most common structural subunits and is found in many natural products. Moreover, piperidine alkaloids and derivatives thereof are of great interest for the pharmaceutical industry since they exhibit a wide range of biological activities. Consequently, short and valuable routes to highly functionalized building blocks for this important ring system are of general
Protecting-Group-Free Synthesis of Amines: Synthesis of Primary Amines from Aldehydes via Reductive Amination
作者:Emma M. Dangerfield、Catherine H. Plunkett、Anna L. Win-Mason、Bridget L. Stocker、Mattie S. M. Timmer
DOI:10.1021/jo100004c
日期:2010.8.20
New methodology for the protecting-group-free synthesis of primary amines is presented. By optimizing the metal hydride/ammonia mediated reductive amination of aldehydes and hemiacetals, primary amines were selectively prepared with no or minimal formation of the usual secondary and tertiary amine byproduct. The methodology was performed on a range of functionalized aldehyde substrates, including in