作者:Hyun-Joon Ha、Gha-Seung Park、Young-Gil Ahn、Gwan Sun Lee
DOI:10.1016/s0960-894x(98)00271-6
日期:1998.7
Practical large scale synthesis of N-benzoyl-(2R,3S)-phenylisoserine methyl ester of the Taxol side chain has been attained from the coupling of chiral imine of N-[(S)-methylbenzyl]benzaldimine with (Z)-alpha-methoxy trimethylsilyl ketene acetal followed by the sequential reactions of lactamization, demethylation, methanolysis and N-benzoylation.
Asymmetric Synthesis of<i>β</i>-Amino-<i>α</i>-Hydroxy Acids through Lewis Acid-Mediated Addition of Ketene Acetal to Imines
作者:Hyun-Joon Ha、Young-Gil Ahn、Jun-Sik Woo、Gwan Sun Lee、Won Koo Lee
DOI:10.1246/bcsj.74.1667
日期:2001.9
Asymmetric synthesis of β-amino-α-hydroxy acids, key components of medicinally important molecules including Paclitaxel, KRI-1314, amastatin, and microginin, has been attained from the aldimine coupling of chiral imines N-alkylidene-(S)- or (R)-α-methylbenzylamine with (Z)-α-methoxyketene methyltrimethylsilyl acetal, followed by demethylation, hydrogenolysis, and hydrolysis.