Photodynamic therapeutic compounds and photodynamic methods of treatment

摘要

The invention provides photodynamic therapeutic compounds and photodynamic methods of treatment. The photodynamic therapeutic compounds may be activated by long wavelength light. The photo-activation by long wavelength light may allow improved tissue penetration. The compounds are selected from the group consisting of compounds of formula (i), or a pharmaceutically acceptable salt thereof: formula (i) wherein PDC is a photodynamic core and wherein R1; R2; R3; and R4 are H, phenyl, pyridine-4-yl, methylpyridinium, N-methylpyridinium-3-yl; 2-phenyl-N-methylpyridinium-4-yl, 3-phenyl-N-methylpyridinium-4-yl, 4-phenyl-N-methylpyridinium-4-yl, 2-phenyl-N-methylpyridinium-3-yl, 3-phenyl-N-methylpyridinium-3-yl or 4-phenyl-N-methylpyridinium-3-yl; and wherein any one or more of R1, R2, R3 and R4 may be optionally substituted.