Published in:
Advanced Synthesis & Catalysis, 345 (2003) 1-2, Seite 33-43
Language:
English
DOI:
10.1002/adsc.200390027
ISSN:
1615-4150;
1615-4169
Origination:
Footnote:
Description:
AbstractCationic iridium complexes with chiral P,N‐ligands and tetrakis[3,5‐(trifluoromethyl)phenyl]borate (BArF) as the counterion are efficient homogeneous catalysts for the enantioselective hydrogenation of olefins. The complexes are readily prepared, air‐stable, and easy to handle. In contrast to chiral rhodium‐ and ruthenium‐phosphine catalysts, they do not require the presence of a polar coordinating group near the CC bond. In the hydrogenation of unfunctionalized arylolefins, high enantioselectivities of >95% ee with turnover numbers of up to 5000 and turnover frequencies of >5000 h−1 have been achieved.