Preparation of novel Sulfur and phosphorus containing oxazolines as ligands for asymmetric catalysis
作者:Joanne V. Allen、Graham J. Dawson、Christopher G. Frost、Ionathan M.J. Williams、Steven J. Coote
DOI:10.1016/s0040-4020(01)80795-x
日期:1994.1
The preparation of enantiomerically pure liginds which contain both an oxazoline group and an additional sulfur or phosphorus donor atom are described. Methyithiomethyl, o-thioanisyl and thienyl oxazolines have been prepared in one step, and o-diphenylphosphinophenyl oxazolines have been prepared in two steps in good yields from commercially available starting materials.
Opticallyactive 2-aryl-1,3-oxazolines, such as aromatic carbocycles, heterocycle-binding 4-benzyl (or phenyl)-1,3-oxazolines and their 5-benzyl (or phenyl)-1,3-oxazoline isomers were successfully prepared through a bromotriphenylphosphonium salt promoted aziridine ring formation and ring opening sequential process involving tandem one-pot cyclization of chiral 2-amino-3-phenylpropanol or 2-amino-2-phenylethanol