(S)-Phenylalanine-derived chiral phosphorus–olefin ligands in rhodium-catalyzed asymmetric 1,4-addition reactions
作者:Rintaro Narui、Sayuri Hayashi、Haruka Otomo、Ryo Shintani、Tamio Hayashi
DOI:10.1016/j.tetasy.2012.02.007
日期:2012.2
all cases; the rhodium complexes coordinated with these ligands have been employed as catalysts for the asymmetric 1,4-addition of arylboronic acids to α,β-unsaturated ketones, to give 1,4-adducts with high enantioselectivities for cyclic enones and moderate enantioselectivities for acyclic enones.
已经设计并合成了手性磷-烯烃(S)-1,(S)-4和(S)-5。这些配体都是由(S)-苯丙氨酸衍生物合成的,并充当铑的磷-烯烃双齿配体。在所有情况下,都可以通过(S)-苯丙氨酸的原始手性有效地控制烯烃的配位面。与这些配体配位的铑配合物已被用作催化剂,用于芳基硼酸不对称地与α,β-不饱和酮进行1,4-加成反应,从而得到对环酮具有高对映选择性的1,4-加合物,对无环烯酮具有中等的对映选择性。