Tetraaryldimethoxybenziporphyrins. At the Edge of Carbaporphyrinoid Aromaticity
作者:Timothy D. Lash、Joseph T. Szymanski、Gregory M. Ferrence
DOI:10.1021/jo070947k
日期:2007.8.1
yield. These compounds readily gave nickel(II) and palladium(II) organometallicderivatives and could be selectively reduced with sodium borohydride to give unstable benziphlorins. Regioselective oxidation with silver acetate afforded the related 22-acetoxybenziporphyrins in 52−64% yield. The dimethoxybenziporphyrins showed chemical shifts by proton NMR spectroscopy that were consistent with weakly diatropic
A two step synthesis of dimethoxytetraphenylbenziporphyrins is reported. Although these porphyrin analogues are cross-conjugated, addition of TFA affords diprotonated species that show a significant diamagnetic ring current. In addition, reaction with nickel(II) acetate also affords organometallic derivatives with borderline aromatic characteristics. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis and Metalation of Dimethoxybenziporphyrins, Thiabenziporphyrins, and Dibenziporphyrins
作者:Stacy C. Fosu、Gregory M. Ferrence、Timothy D. Lash
DOI:10.1021/jo502063w
日期:2014.11.21
nature of this system was demonstrated by X-ray crystallography. The dimethoxybenziporphyrins reacted with palladium(II) acetate to give the related organometallic derivatives, but the thiabenziporphyrins underwent a demethylation to afford palladium(II) thiaoxybenziporphyrins. Related palladium(II) complexes were also prepared from previously reported thiacarbaporphyrinoids. The X-ray structure for one