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Atropisomeric [(diphosphine)Au2 Cl2 ] complexes and their catalytic activity towards asymmetric cycloisomerisation of 1,6-enynes.

Barreiro EM, Boltukhina EV, White AJ, Hii KK - Chemistry (2014)

Bottom Line: X-ray crystal structures of two [(diphosphine)Au2 Cl2 ] complexes (in which diphosphine=P-Phos and xylyl-P-Phos; P-Phos=[2,2',6,6'-Tetramethoxy-4,4'-bis(diphenylphosphino)-3,3'-bipyridine]) were determined and compared to the reported structures of similar atropisomeric gold complexes.Conversely, the same effect was not observed for ligands based on the binaphthyl (BINAP) series.The catalytic activity of these complexes was subsequently assessed in the enantioselective cycloisomerisation of 1,6-enynes and revealed an over-riding electronic effect: more-electron-rich phosphines promote greater enantioselectivity.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ (UK).

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Formation of cationic gold complexes.
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sch02: Formation of cationic gold complexes.


Atropisomeric [(diphosphine)Au2 Cl2 ] complexes and their catalytic activity towards asymmetric cycloisomerisation of 1,6-enynes.

Barreiro EM, Boltukhina EV, White AJ, Hii KK - Chemistry (2014)

Formation of cationic gold complexes.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4524423&req=5

sch02: Formation of cationic gold complexes.
Bottom Line: X-ray crystal structures of two [(diphosphine)Au2 Cl2 ] complexes (in which diphosphine=P-Phos and xylyl-P-Phos; P-Phos=[2,2',6,6'-Tetramethoxy-4,4'-bis(diphenylphosphino)-3,3'-bipyridine]) were determined and compared to the reported structures of similar atropisomeric gold complexes.Conversely, the same effect was not observed for ligands based on the binaphthyl (BINAP) series.The catalytic activity of these complexes was subsequently assessed in the enantioselective cycloisomerisation of 1,6-enynes and revealed an over-riding electronic effect: more-electron-rich phosphines promote greater enantioselectivity.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ (UK).

Show MeSH