The present invention is directed to a ring opening reaction of heteronorbomenes and other α,β-unsaturated compounds of formula (Ia) and (Ib):
with a nucleophile in the presence of a transition metal complex, characterized in that it is microwave assisted.
Rhodium-phosphorus complexes and their use in ring opening reactions
申请人:Laboratorios Del. Dr. Esteve, S.A.
公开号:EP2070904A1
公开(公告)日:2009-06-17
The present invention is directed to novel rhodium-phosphorus complexes of formula:
[Rh(PP')(solv)2]X
the process for their preparation and their use as catalysts in the ring opening reaction of heteronorbomenes and other α,β-unsaturated compounds.
very important reaction in the chemistry of CC and CX bond formation. By using the hitherto applied in situ technique for the generation of the μ2-bridged, dimeric neutral rhodium complexes, however, the catalytically active species and its concentration remained unidentified. Furthermore, the reaction temperature is at least 80 °C. The application of cationic rhodium(I) solvate complexes (that no longer
Novel compounds and a novel process for their preparation
申请人:Fagnou Keith
公开号:US20080300271A1
公开(公告)日:2008-12-04
The present invention is directed to a procedure for making an enantidimerically enriched compound containing a hydronaphthalene ring structure. The process involves reacting oxabenzonorbornadienes with nuclophiles using rhodium as a catalyst and in the presence of a phosphine ligand. The compounds synthesized may be used in pharmaceutical preparations for the treatment of a variety of diseases and conditions.