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Z. Naturforsch. 2013,
68b, 707 – 713
doi:10.5560/ZNB.2013-3067
Synthesis of a 30-Membered Macrocycle Incorporating Two Ruthenium Sandwich Complexes
1 Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstr. 5–13, 81377 München, Germany
2 Institute of Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
3 Present address: Baerlocher GmbH, 85716 Unterschleißheim
Reprint requests to Prof. Dr. Thomas Lindel. E-mail:
th.lindel@tu-bs.de
Received February 24, 2013 / published online Juli 2, 2013
Dedicated to Professor Heinrich Nöth on the occasion of his 85th birthday
The first macrocycle incorporating two ruthenium sandwich complexes has been synthesised. Key step is a cyclodimerisation by double etherification of a p-chlorophenylalanine-derived [RuCp*]+ complex. Silica-based cation exchange chromatography allowed the separation of dicationic diastereomers. Assignment of the relative configurations was possible by X-ray structure determination. Partial demetalation in acetonitrile proceeded in high yield by irradiation in the presence of biphenyl.
Key words: Cation Exchange Chromatography, Diaryl Ethers, Macrocycles, Ruthenium, Sandwich Complexes