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
A new route to (–)-cherylline via a regiocontrolled polonovski-type reaction as the key step
作者:Takashi Nomoto、Nobuyuki Nasui、Hiroaki Takayama
DOI:10.1039/c39840001646
日期:——
A facile and efficient synthesis of (–)-cherylline (1) was accomplished in 46% overall yield starting from the readily accessible (12S)-(–)-3,9-dibenzyloxy-2-methoxy-tetrahydro-6,12-methanodibenz[c.f]azocine (4)viaa regiocontrolledPolonovski-typereaction as the keystep.