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.
Chemo-enzymatic synthesis of all isomeric 3-phenylserines and -isoserines
作者:H. Hönig、P. Seufer-Wasserthal、H. Weber
DOI:10.1016/s0040-4020(01)90519-8
日期:1990.1
prepared from cinnamic acid derivatives or viaaldolcondensations of benzaldehyde and suitable enolates in few steps. These racemates were resolved with lipases from Candida cylindracea (CC) and Pseudomonas fluorescens (P) and the obtained products were hydrogenated to 3-phenylserines and -isoserines. The influence of the acyl group in the enzymatic resolution of erythro-3-azido-2-acyloxy-3-phenylpropionic
Simplified Modular Access to Enantiopure 1,2-Aminoalcohols via Ni-Electrocatalytic Decarboxylative Arylation
作者:Jiawei Sun、Hirofumi Endo、Megan A. Emmanuel、Martins S. Oderinde、Yu Kawamata、Phil S. Baran
DOI:10.1021/jacs.3c14119
日期:2024.3.6
Chiral aminoalcohols are omnipresent in bioactive compounds. Conventional strategies to access this motif involve multiple-step reactions to install the requisite functionalities stereoselectively using conventional polar bond analysis. This study reveals that a simple chiral oxazolidine-based carboxylic acid can be readily transformed to substituted chiral aminoalcohols with high stereochemical control