Porphomethenes and Porphodimethenes Synthesized by the Two- and Four-Electron Oxidation of themeso-Octaethylporphyrinogen
摘要:
Stepwise dealkylation of meso-octaethylporphyrinogen 1 yields porphomethene 2 and porphodimethene 3, providing access to large quantities of these valuable intermediates. The synthetic sequence relies on SnCl4⋅2 THF, Li, and H2O; the extent of dealkylation depends on the amount of SnCl4⋅2 THF employed.