New chiral titanium complexes for enantioselective reductive cyclizations of diimines to trans-2,3-diarylpiperazines
New chiral titanium complexes for enantioselective reductive cyclizations of diimines to trans-2,3-diarylpiperazines
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Date
2008-02-11
Authors
Vairaprakash, Pothiappan
Periasamy, Mariappan
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Abstract
Enantioselective intramolecular reductive coupling of diimines by chiral titanium complexes, prepared using a titanium(IV) reagent and hemisalen ligands derived from chiral β-amino alcohols, gives trans-2,3-diarylpiperazines in up to 97% ee. © 2007 Elsevier Ltd. All rights reserved.
Description
Keywords
2,3-Diarylpiperazines,
Diimine,
Enantioselective reductive coupling,
Hemisalen ligand
Citation
Tetrahedron Letters. v.49(7)