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Expanding the Range of “Daniphos”‐Type P∩P‐ and P∩N‐Ligands: Synthesis and Structural Characterisation of New [(η 6 ‐arene)Cr(CO) 3 ] Complexes
Author(s) -
Alberico Elisabetta,
Braun Wolfgang,
CalmuschiCula Beatrice,
Englert Ulli,
Salzer Albrecht,
Totev Daniel
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700568
Subject(s) - chemistry , substituent , diastereomer , steric effects , stereoselectivity , stereochemistry , chirality (physics) , trimethylsilyl , benzylamine , planar chirality , medicinal chemistry , enantioselective synthesis , catalysis , organic chemistry , chiral symmetry breaking , physics , quantum mechanics , nambu–jona lasinio model , quark
New P∩P‐ and P∩N‐ligands have been synthesised whose core structure is an [(η 6 ‐arene)Cr(CO) 3 ] unit. These new ligands, which extend the range of “Daniphos” ligands, are endowed with central and planar chirality and have been prepared through a stereoselective synthetic strategy from optically pure benzylamines bearing a second substituent on the arene other than the benzyldimethylamino group. Because the two faces of unsymmetrically 1,2‐ and 1,3‐disubstituted benzylamine are diastereotopic, which means that diastereomeric complexes arise upon coordination of theCr(CO) 3 fragment to either of these two faces, the synthetic plan has been adjusted by exploiting the trimethylsilyl group as a temporary steric modulator in order to access both complexes with high diastereoselectivity. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)