Chiral tridentate bis(oxazol-2-ylimino) isoindoline-based pincer ligands: isolation and characterizationviadeligation fromin situprepared Cd-ligand complexes
Dalton Transactions, ISSN: 1477-9234, Vol: 50, Issue: 29, Page: 10041-10049
2021
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Article Description
The first isolation and structural characterization of a series of chiral trinitrogen 1,3-bis(4,5-dihydrooxazol-2-ylimino)isoindoline-based pincer ligands are reported. Cadmium complexes, isolated as Cd(LX)where LX is the deprotonated form of LXH = 1,3-bis(4,5-dihydro-4-(R)-phenyloxazol-2-ylimino)-isoindoline ((R,R)-5H) or 1,3-bis(4,5-dihydro-4-(S)-iso-propyloxazol-2-ylimino)isoindoline ((S,S)-6H) were preparedin situ viatraditional or microwave-based techniques with the latter being more efficient but less able to be scaled up at this time. Ligands (R,R)-5H and (S,S)-6H were isolatedviadeligation from their respective cadmium complexes using a thiol-based ligand exchange protocol. The characterization of ligands and their respective cadmium complexes, in both the solid (X-ray crystallography) and solution (NMR spectroscopy) states are reported. Pd((S,S)-6)(OAc) is reported as a proof-of-concept of the ability to prepare 1 : 1 ligand to metal ratio complexes that are believed to be necessary as potential enantioselective catalysts.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85111438819&origin=inward; http://dx.doi.org/10.1039/d0dt02531c; http://www.ncbi.nlm.nih.gov/pubmed/34250529; https://xlink.rsc.org/?DOI=D0DT02531C; https://dx.doi.org/10.1039/d0dt02531c; https://pubs.rsc.org/en/content/articlelanding/2021/dt/d0dt02531c
Royal Society of Chemistry (RSC)
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