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.