Rhodium-catalyzed enantioselective 1,4-additions of arylboronic acids to substituted enones
作者:Laura Mediavilla Urbaneja、Norbert Krause
DOI:10.1016/j.tetasy.2006.01.006
日期:2006.2
The rhodium-catalyzed enantioselective 1,4-addition of arylboronicacids to the bifunctional Michael acceptors 1–3 in the presence of phosphoramidites L2–L4 occurs regioselectively at the endocyclic C–C double bond and in up to 95% ee. The presence of KOH is required to increase the reactivity so that less boronic acid and lower reaction temperatures can be used. The corresponding addition to chiral
SYNTHESIS OF CYCLITOLS FROM SUBSTITUTED ARENE DIOLS
申请人:VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
公开号:EP0477359B1
公开(公告)日:1995-07-05
Catalytic enantioselective boron conjugate addition to cyclic carbonyl compounds: a new approach to cyclic β-hydroxy carbonyls
作者:Xinhui Feng、Jaesook Yun
DOI:10.1039/b914207j
日期:——
The highly enantioselective conjugate boration of six-membered and seven-membered cyclicenones and unsaturated esters was achieved by the use of a copper-(R,S)-Taniaphos complex with up to 99% ee under optimal conditions.