Synthesis of new chiral hydroxy oxazolines and their use in the catalytic asymmetric phenyl transfer to aldehydes
摘要:
Starting either from benzoylformic acid or ethyl oxamate and enantiopure beta-amino alcohols, several chiral alpha-hydroxy oxazolines have been prepared by short synthetic routes. Subsequently, they have been employed in the catalytic asymmetric phenyl transfer to various aldehydes, using a mixture of triphenylborane and diethylzinc as the phenyl source. The corresponding secondary alcohols were obtained with good enantioselectivities (up to 81% ee) and up to 92% yield. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of new chiral hydroxy oxazolines and their use in the catalytic asymmetric phenyl transfer to aldehydes
摘要:
Starting either from benzoylformic acid or ethyl oxamate and enantiopure beta-amino alcohols, several chiral alpha-hydroxy oxazolines have been prepared by short synthetic routes. Subsequently, they have been employed in the catalytic asymmetric phenyl transfer to various aldehydes, using a mixture of triphenylborane and diethylzinc as the phenyl source. The corresponding secondary alcohols were obtained with good enantioselectivities (up to 81% ee) and up to 92% yield. (c) 2005 Elsevier Ltd. All rights reserved.