Silylethynyl Substituents as Porphyrin Protecting Groups for Solubilization and Selectivity Control
摘要:
Silylethynyl substituents are proposed as protecting groups for porphyrin derivatives to enhance their solubility and enable regioselective functionalization. After usage as protecting groups, silylethynyl groups at the mesa-positions can be efficiently removed upon heating with aqueous H2SO4 in the presence of a surfactant. This approach was applied to the preparation of unsymmetrically beta-substituted porphyrins and porphin-porphyrin oligomers, which were inaccessible by conventional methods.
Silylethynyl Substituents as Porphyrin Protecting Groups for Solubilization and Selectivity Control
摘要:
Silylethynyl substituents are proposed as protecting groups for porphyrin derivatives to enhance their solubility and enable regioselective functionalization. After usage as protecting groups, silylethynyl groups at the mesa-positions can be efficiently removed upon heating with aqueous H2SO4 in the presence of a surfactant. This approach was applied to the preparation of unsymmetrically beta-substituted porphyrins and porphin-porphyrin oligomers, which were inaccessible by conventional methods.