Parallel kinetic resolution of active esters using a quasi-enantiomeric combination of (R)-4-phenyl-oxazolidin-2-one and (S)-4,5,5-triphenyl-oxazolidin-2-one
作者:Elliot Coulbeck、Jason Eames
DOI:10.1016/j.tetasy.2008.09.012
日期:2008.10
The parallel kinetic resolution of a series of racemic pentafluorophenyl 2-(4-aryl/phenyl)-propionates and -butanoates using a quasi-enantiomeric combination of (R)-4-phenyl-oxazolidin-2-one and (S)-4,5,5-triphenyl-oxazolidin-2-one is discussed. The levels of diastereoselectivity were excellent (86-98% de) leading to separable quasi-enantiomeric oxazolidin-2-one adducts in good yield. This methodology was used to resolve 2-phenyl propionic acid. (C) 2008 Elsevier Ltd. All rights reserved.
Resolution of pentafluorophenyl esters using oxazolidin-2-ones
作者:Najla Al Shaye、Jason Eames
DOI:10.1016/j.tetlet.2010.08.109
日期:2010.11
A series of structurally related racemic pentafluorophenyl active esters were resolved using an equimolar amount of (S)-4-phenyloxazolidin-2-one. The levels of diastereocontrol were found to be excellent (80-96% de) at similar to 40% conversion. (C) 2010 Elsevier Ltd. All rights reserved.