Simple Synthesis of a Sequential 2,2’-Bipyridine/Catechol Ligand and Preliminary Coordination Studies

Markus Albrecht; Cyrill Riether

doi:10.1055/s-1995-4951

Synlett 1995; 1995(4): 309-312
DOI: 10.1055/s-1995-4951

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Simple Synthesis of a Sequential 2,2’-Bipyridine/Catechol Ligand and Preliminary Coordination Studies

Markus Albrecht^* , Cyrill Riether

^*Institut für Organische Chemie, Universität Karlsruhe, Richard-Willstätter-Allee, D-76131 Karlsruhe, Germany

Abstract

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The sequential ligand 8 with ambident chelating units is prepared by deprotonation of 5,5’-dimethyl 2,2’-bipyridine (6) followed by addition of 2,3-dimethoxybenzyl bromide (2). Coordination of 8 to Fe(II) ions results in a mixture of two isomeric compounds mer/fac-12 where bonding occurs by interaction of the metal with the bipyridine units. On the other hand, Ti(IV) selectively binds to the oxygen donor of 8 forming complex 13.

2,2’-bipyridine - catechol - sequential ligand - iron(II) - titanium(IV)

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