Synthesis of Novel Chiral Benzophospholanes and Their Application in Asymmetric Hydrogenation
作者:Hideo Shimizu、Takao Saito、Hidenori Kumobayashi
DOI:10.1002/adsc.200390009
日期:2003.1
A new class of chiral ligands bearing one or two benzophospholanes was developed for the purpose of Ru-catalyzed asymmetric hydrogenation. Although results of the Ru catalysis remain insufficient so far, 1,2-bis(2-isopropyl-2,3-dihydro-1H-phosphindol-1-yl)benzene (iPr-BeePHOS: 2b) has been found to provide high enantioselectivity in the Rh-catalyzed asymmetric hydrogenation of an enamide.
为了Ru催化的不对称氢化的目的,开发了带有一或两个苯并膦基的一类新的手性配体。尽管到目前为止,Ru催化的结果仍然不足,但已发现1,2-双(2-异丙基-2,3-二氢-1 H-膦吲哚-1-基)苯(iPr-BeePHOS:2b)具有很高的催化作用。Rh催化烯酰胺不对称氢化中的对映选择性。