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Planar chiral arene tricarbonylchromium complexes via enantioselective deprotonation / electrophile addition reactions
|Published in||Tetrahedron Letters. 1994, vol. 35, no. 21, p. 3497 - 3500|
|Abstract||Sequential reaction of prochiral (η6-arene)Cr(CO)3 complexes with chiral amide bases and electrophiles yielded planar chiral complexes. Benzaldehyde acetal and phenyl carbamate complexes gave o-substituted products with 64 to 81% enantiomeric excess. With the benzaldehyde acetal complex, competitive benzylic deprotonation occurred. Enantiomeric purity of the substituted carbamate complexes could be increased to > 90% ee by fractional crystallization. The racemate crystallized selectively, leaving the enantiomerically enriched complex in solution.|
|KUNDIG, Ernst Peter, QUATTROPANI, Anna. Planar chiral arene tricarbonylchromium complexes via enantioselective deprotonation / electrophile addition reactions. In: Tetrahedron Letters, 1994, vol. 35, n° 21, p. 3497 - 3500. doi: 10.1016/S0040-4039(00)73219-9 https://archive-ouverte.unige.ch/unige:6669|