Rhodium(I)-Catalyzed Enantioselective Hydrogenation of Substituted Acrylic Acids with Sterically Similar β,β-Diaryls
作者:Yang Li、Kaiwu Dong、Zheng Wang、Kuiling Ding
DOI:10.1002/anie.201302349
日期:2013.6.24
Distinct differentiation: β,β‐Disubstituted acrylic acids with sterically similar geminal diaryl groups can be hydrogenated with excellent enantioselectivities in the presence of a RhI complex formed in situ with two‐component ligands, a chiral secondary phosphineoxide (SPO) and an achiral phosphine (Ph3P). The sense of asymmetric induction was found to be controlled by the substrate configuration
CuH-Catalyzed Asymmetric Reductive Amidation of α,β-Unsaturated Carboxylic Acids
作者:Achim Link、Yujing Zhou、Stephen L. Buchwald
DOI:10.1021/acs.orglett.0c02064
日期:2020.7.17
The direct enantioselective copper hydride (CuH)-catalyzed synthesis of β-chiral amides from α,β-unsaturatedcarboxylicacids and secondary amines under mild reaction conditions is reported. The method utilizes readily accessible carboxylicacids and tolerates a variety of functional groups in the β-position including several heteroarenes. A subsequent iridium-catalyzed reduction to γ-chiral amines
CuH-Catalyzed Asymmetric Reduction of α,β-Unsaturated Carboxylic Acids to β-Chiral Aldehydes
作者:Yujing Zhou、Jeffrey S. Bandar、Richard Y. Liu、Stephen L. Buchwald
DOI:10.1021/jacs.7b12260
日期:2018.1.17
The copper hydride (CuH)-catalyzed enantioselective reduction of α,β-unsaturatedcarboxylicacids to saturated aldehydes is reported. This protocol provides a new method to access a variety of β-chiral aldehydes in good yields, with high levels of enantioselectivity and broad functional group tolerance. A reaction pathway involving a ketene intermediate is proposed based on preliminary mechanistic