850341-93-4

Upstream product

• 16456-81-8 5,10,15,20-tetraphenyl-21H,23H-porphine iron(lll) chloride 
• 85529-12-0 [5-(4-nitrophenyl)-10,15,20-triphenylporphynato]iron(III) chloride 

Relevant academic research and scientific papers

Substituent effects on selectivity of coupled oxidation of iron tetraphenylporphyrins

Coupled oxidation of iron tetraphenylporphyrins bearing either a OMe, Me, F, Cl, COOMe, CF3 or CN group in the para-position of the phenyl groups gave tetraarylbiladien-ab-1-one and triarylbilindione. The ratios of the yields of the former to those of the latter were linearly correlated with the Hammett substituent constants σp+, with a positive slope (δσ = 0.64). The Hammett plot of the oxidation rate vs. the substituent constant σp also showed a positive slope (σ = 0.30). These substituent effects suggest that a nucleophilic step is included in the formation of bilindione. Coupled oxidation of an A3B type tetraarylporphyrin having an electron withdrawing nitro group in one of the phenyl groups indicated that the oxidation leading to biladienone occurred rather statistically in any of the meso-positions, while the oxidation leading to bilindione occurred preferentially in the meso-position bearing the 4-nitrophenyl group.

A facile and versatile preparation of bilindiones and biladienones from tetraarylporphyrins

Bilindiones and biladienones carrying aryl groups at the meso positions were prepared using coupled oxidation reactions of iron tetraarylporphyrins in 20-63% yield. The Royal Society of Chemistry 2005.