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Synthesis 2007(8): 1169-1174
DOI: 10.1055/s-2007-965990
DOI: 10.1055/s-2007-965990
PAPER
© Georg Thieme Verlag Stuttgart · New York
Useful Procedure for the Synthesis of Pincer-Type Heterodentate Azomethine Ligands Bearing Multiple Functionalities
Further Information
Received
12 December 2006
Publication Date:
23 March 2007 (online)
Publication History
Publication Date:
23 March 2007 (online)
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Abstract
A simple and efficient synthetic protocol is developed for the preparation of heterodentate azomethine ligands bearing various functionalities, by Schiff condensation of dialdehydes with monoprotected diamine followed by reduction of the azomethine bond and deprotection. The efficient procedure of obtaining N-tert-butoxycarbonyl-protected o-phenylenediamine in large scale is also elaborated.
Key words
Schiff bases - aromatic diamines - cyclizations - macrocycles - regioselectivity - heteropolydentate ligand
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References
Dr. Kataev E. A. (M. V. Lomonosov Moscow State University and University of Texas at Austin), private communication.