2018
DOI: 10.1002/chir.23019
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Synthesis of chiral salalen ligands and their in‐situ generated Cu‐complexes for asymmetric Henry reaction

Abstract: Chiral salalen ligands derived from (S)‐proline and derivatives of salicyaldehydes were synthesized, and their in‐situ generated Cu (II) complexes were evaluated in the asymmetric Henry reaction. Salalen ligand of different substituents on the phenyl moiety showed remarkable effect on the enantioselectivity of nitro‐aldol product of 4‐nitrobenzaldehyde and nitromethane. Cu (II) complex generated in situ with (S)‐2‐(tert‐butyl)‐6‐((2‐(((2‐hydroxy‐3‐methylbenzylidene)amino)methyl)pyrrolidin‐1‐yl)methyl) phenol (… Show more

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