title: The simple production of nonsymmetric quaterpyridines through Kröhnke pyridine synthesis.
abstract: Quaterpyridines have been demonstrated to be useful building blocks in metallo-supramolecular chemistry; however, their synthesis requires the preparation of sensitive building blocks. We present here three examples of nonsymmetric quaterpyridines that were easily obtained in yields of 70-85% by condensation of commercially available enones with 6-acetyl-2,2':6',2''-terpyridine through a Kröhnke pyridine synthesis. Easy access to 6-acetyl-2,2':6',2''-terpyridine starting from 2,6-diacetylpyridine and 2-acetylpyridine is described. The X-ray analysis of a chiral quaterpyridine and its Pt(II) complex is presented.
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, F-31077 Toulouse, France ; Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Sasaki
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, F-31077 Toulouse, France ; Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France.
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Daran
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, F-31077 Toulouse, France ; Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France.
authors.forename: Gérard
authors.initials: G
authors.lastname: Commenges
keywords: Kröhnke pyridine synthesis; Mannich bases; X-ray diffraction; heterocycles; platinum