Functionalized 2,2‘-Bipyridines and 2,2‘:6‘,2‘ ‘-Terpyridines via Stille-Type Cross-Coupling Procedures
摘要:
Stille-type cross-coupling procedures are utilized in order to prepare a variety of fanctionalized 2,2'-bipyridines and 2,2':6',2"-terpyridines. Such N-heterocyclic compounds are of great interest as chelating ligands for transition-metal ions in the field of supramolecular chemistry. Various mono- and disubstitued 2,2'-bipyridines were synthesized in high yields and multigram scales using a modular design principle. The terpyridines may be functionalized in one step with different substituents at the outer pyridine rings and at the 4'-position of the centered ring, leading to multifunctionalized compounds. The initially obtained methyl ester and ethyl ester groups can be simply converted into bromomethyl and hydroxymethyl groups which allow further functionalization reactions.
Functionalized 2,2‘-Bipyridines and 2,2‘:6‘,2‘ ‘-Terpyridines via Stille-Type Cross-Coupling Procedures
作者:Marcel Heller、Ulrich S. Schubert
DOI:10.1021/jo0260600
日期:2002.11.1
Stille-type cross-coupling procedures are utilized in order to prepare a variety of fanctionalized 2,2'-bipyridines and 2,2':6',2"-terpyridines. Such N-heterocyclic compounds are of great interest as chelating ligands for transition-metal ions in the field of supramolecular chemistry. Various mono- and disubstitued 2,2'-bipyridines were synthesized in high yields and multigram scales using a modular design principle. The terpyridines may be functionalized in one step with different substituents at the outer pyridine rings and at the 4'-position of the centered ring, leading to multifunctionalized compounds. The initially obtained methyl ester and ethyl ester groups can be simply converted into bromomethyl and hydroxymethyl groups which allow further functionalization reactions.
Multi-functionalized 2,2′:6′,2′′-Terpyridines
作者:Marcel Heller、Ulrich S. Schubert
DOI:10.1055/s-2002-25357
日期:——
In this contribution, Stille-type cross-coupling procedure is shown to be an easy and universal way to prepare a variety of functionalized terpyridines. They may be functionalized in one step with different substituents at the outer pyridine rings and at the 4′-position of the centered ring, leading to multi-functionalized compounds. The initially obtained methylester and ethylester groups may be simply converted into bromomethyl and hydroxymethyl groups, which allow further functionalization reactions.