title: Diastereoselective methylation of bis(N-confused porphyrinatonickel(II)): access to configurationally stable chiral bis(porphyrinoid) and non-symmetric dimers.
abstract: Bis- and tris(methylated) derivatives of 3,3'-bis(N-confused porphyrin) were obtained. Methylation of C21 stabilizes the geometry of the axially chiral system allowing separation of enantiomers and assignment of an absolute configuration by X-ray methods.
authors.affiliation: Department of Chemistry, University of Wrocław F. Joliot-Curie Street 14, 50 383 Wrocław, Poland. Piotr.Chmielewski@chem.uni.wroc.pl
authors.forename: Piotr J
authors.initials: PJ
authors.lastname: Chmielewski
authors.forename: Justyna
authors.initials: J
authors.lastname: Maciołek