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The conjugate addition of S-, N- and O-heterocyclic nucleophiles to the CC bond of dehydroalanine, bonded as a Schiff’s base to the chiral auxiliary (S)-2-[N-(N′-benzylprolyl)amino]benzophenone in the coordination sphere of Ni II , resulted in the asymmetric synthesis of novel (S)-α-aminopropionic acids containing a heterocyclic side chain, including imidazole, triazole, thiodiazole, thiazole...
New fluorine-containing chiral auxiliaries (S)-N-(2-benzoylphenyl)-1-(2-fluorobenzyl)-, (S)-N-(2-benzoylphenyl)-1-(3-fluorobenzyl)-, and (S)-N-(2-benzoylphenyl)-1-(4-fluorobenzyl)-pyrrolidine-2-carboxamide and their Ni II complexes of Schiff bases with glycine and alanine have been synthesized. The greater efficiency of the complexes in terms of faster reaction rates and stereoselectivities...