Metal-Organocatalytic Tandem Azide Addition/Oxyamination of Aldehydes for the Enantioselective Synthesis of β-Amino α-Hydroxy Esters
作者:Pranab K. Shyam、Hye-Young Jang
DOI:10.1002/ejoc.201301915
日期:2014.3
The tandem reaction of α,β-unsaturated aldehydes with trimethylsilyl azide and 2,2,6,6-tetramethylpiperidin-1-yloxy in the presence of chiral amines and iron complexes as the catalysts in a one-pot reaction enantioselectively afforded β-azido α-oxyaminated aldehydes. Further synthetic modification of the product afforded β-aminoα-hydroxyesters in good yields with good diastereo- and enantioselectivities
Application of yeast-catalyzed reductions to synthesis of (2R,3S)-phenylisoserine
作者:Jeff Kearns、Margaret M. Kayser
DOI:10.1016/s0040-4039(00)76640-8
日期:1994.5
A simple synthesis of (2R,3S)-phenylisoserine, a precursor of the C-13sidechain of Taxol®(paclitaxel), utilising yeast-catalyzed reduction to generate a second chiral centre is reported. This short enantioselective series of transformations can be readily adapted to large scale production of a variety of N-substituted paclitaxel analogues.