Oxidative addition reactions and stereochemistry on rhodium/4,5-bis(2-oxazolinyl)xanthene complexes

The oxidative addition reactions on 4,5-bis(2-oxazolinyl)-(2,7-di-tert-butyl-9,9-dimethyl)-9H-xanthene (Xabox)/rhodium(I) complex were examined using chloroacetate and substituted diynes to give stereoselectively the corresponding methoxycarbonylmethyl-rhodium(III) complex and rhodacyclopentadiene complexes, respectively. The rhodacycle complex 7 catalyzed the cyclotrimerization of the diynes and alkynes to give arene derivatives.

The reaction of 4,5-bis(2-oxazolinyl)xanthene (Xabox) ligand and rhodium(I) complex with chloroacetate and diyne gave oxidative addition complexes. The diyne complex exhibited catalytic activity for cyclotrimerization reaction.Figure optionsDownload as PowerPoint slide