Temperature-Controlled Bidirectional Enantioselectivity in a Dynamic Catalyst for Asymmetric Hydrogenation
作者:Golo Storch、Oliver Trapp
DOI:10.1002/anie.201412098
日期:2015.3.16
enantiomerically pure catalysts is one of the most widely used methods for the preparation of enantiomerically pure compounds. The separate synthesis of both enantiomerically pure compounds requires tedious and time‐consuming preparation of both enantiomerically pure catalysts or chiral separation of the racemic products. Here, we report a stereochemically flexible diastereomeric rhodium(I) catalyst
Enantiomerically pure bicyclo[3.3.1]nona-2,6-diene as the sole source of enantioselectivity in BIPHEP-Rh asymmetric hydrogenation
作者:Tharmalingam Punniyamurthy、Monika Mayr、Alexander S. Dorofeev、Carole J. R. Bataille、Silvia Gosiewska、Bao Nguyen、Andrew R. Cowley、John M. Brown
DOI:10.1039/b807669c
日期:——
In situ resolution of the rapidly racemising diphosphine BIPHEP and its relatives with the cationic Rh complex of (S,S)-bicyclonona-2,6-diene permits the asymmetric hydrogenation of dehydroamino esters.