Reaction of the (S,S)-salen-cobalt(III)-N-benzyl-L-serine complex 2 with four diol-derived chlorophosphites afforded phosphites 3a–3d in moderate yields (37–72%). Structural studies of these monodentate phosphite ligands and of their Rh-complexes were performed in solution by 1H and 31P NMR spectroscopy. The ligands were screened in several enantioselective catalytic applications, showing good activity and moderate enantioselectivity in the palladium-catalyzed desymmetrization of meso-cyclopenten-2-ene-1,4-diol biscarbamate.
Chiral (salen)Co(III)(N-benzyl-L-serine) derived phosphites : monodentate P-ligands for enantioselective catalytic applications / S. Carboni, L.L. Pignataro, C.M.A. Gennari, U. Piarulli. - In: TETRAHEDRON-ASYMMETRY. - ISSN 0957-4166. - 20:10(2009), pp. 1185-1190. [10.1016/j.tetasy.2009.04.001]
Chiral (salen)Co(III)(N-benzyl-L-serine) derived phosphites : monodentate P-ligands for enantioselective catalytic applications
L.L. PignataroSecondo
;C.M.A. GennariPenultimo
;
2009
Abstract
Reaction of the (S,S)-salen-cobalt(III)-N-benzyl-L-serine complex 2 with four diol-derived chlorophosphites afforded phosphites 3a–3d in moderate yields (37–72%). Structural studies of these monodentate phosphite ligands and of their Rh-complexes were performed in solution by 1H and 31P NMR spectroscopy. The ligands were screened in several enantioselective catalytic applications, showing good activity and moderate enantioselectivity in the palladium-catalyzed desymmetrization of meso-cyclopenten-2-ene-1,4-diol biscarbamate.
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