The synthesis of chiral mono- and bis-annelated 1,3-cyclopentadienes derived from tartaric acid, a chiral pool starting material, is described. In addition to known functionalized chiral 1,3-cyclopentadienes, new derivatives have also been structurally characterized by X-ray crystallographic and NMR spectroscopic studies. Neutral and cationic ruthenium(II) complexes, containing a mono-annelated chiral cyclopentadienyl ligand ( 1 ), have been successfully prepared. The X-ray crystal structure of [(η 5 -Cp‘)Ru(η 6 -benzene)][PF 6 ], Cp‘ = 1, has been determined.
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McGlacken et al. (2007) studied this question.
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