8-Diphenylphosphino-2-methyl quinoline

The synthesis and characterization of optically active amino acidate alkynyl complexes of formula CpRh(aa)(C=CR) (aa = L-prolinate (Pro), R = CMcs) were reported. A series of dirhodium cr-alkynyl complexes were also studied. The sterically demanding phosphine 2-(di-o-tolylphosphino)phenol was prepared and used to create a series of esters with A -acylated amino acids. The phosphine-containing esters reacted with [Rh(/t-Cl)(cyclooctene)2]2 to give products of oxidative addition of the ester carbonyl-oxygen bond to the Rh center, 231 and 232. The ligand 2- (diphenylphosphino)methyl)quinolin-8-acetate reacted with [Rh( -Cl)(cyclooctene)2]2 affording only one of the three possible diastereomers, 233. ... 

---