Phosphine oxazoline complexes, iridium

Mechanistic aspects of the hydrogenation of alkenes catalysed by iridium complexes with a new class of chiral phosphine-oxazoline ligands have been discussed and a selectivity model to help rationalize the results obtained has been presented.344... 

TTF in aqueous solution has been examined <07TL8430> and fabrication of thin crystals of [tetramethyltetraselenafulvalene]2+ PF6" within a confined electrode has been reported <07SM(157)492>. The synthesis, structures and electrochemistry of Cu and Co complexes of TTF-oxazolines 53 have been described <07ICA(360)233> and the crystal stmcture of the valine-derived TTF-oxazoline 54 has been determined while the corresponding phosphine 55 has proved to be an effective ligand for iridium-catalysed asymmetric hydrogenation of imines <07TA1877>. 

Several cationic cyclopentadienylrhodium and iridium complexes 175 with attached chiral ligands behave like Lewis acids and have found their way as catalysts for Diels-Alder reaction. The complexes with chiral iminopyridine 175a,b [113], chiral oxazoline 175d,e [114], and chiral phosphine ligands 175c [115] were studied in the cycloaddition of cyclopentadiene with methacrolein into 176 (Scheme 78). Some typical examples are given in Table 34. 

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