High-yielding syntheses of hydrophilic conjugatable chlorins and bacteriochlorins

Org Biomol Chem. 2009 Sep 7;7(17):3430-6. doi: 10.1039/b908713c. Epub 2009 Jul 2.

Abstract

Next-generation photodynamic therapy agents based upon the conjugation of multiple photosensitizers to a targeting backbone will allow for more efficacious light-based therapies. To this end, we have developed glucose-modified chlorins and bacteriochlorins featuring a reactive carboxylic acid linker for conjugation to targeting moieties. The photosensitizers were synthesized in relatively high yields from meso-tetra(p-aminophenyl)porphyrin, and resulted in neutral, hydrophilic chromophores with superb absorption profiles in the far-red and near-infrared portions of the electromagnetic spectrum. In addition, conjugation of these photosensitizers to a model nanoscaffold (crosslinked dextran-coated nanoparticles) demonstrated that the inclusion of hydrophilic sugar moieties increased the number of dyes that can be loaded while maintaining suspension stability. The described compounds are expected to be particularly useful in the synthesis of a number of targeted nanotherapeutic systems.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Cross-Linking Reagents
  • Glucose / chemistry
  • Photochemotherapy
  • Photosensitizing Agents / chemical synthesis*
  • Porphyrins / chemistry*
  • Static Electricity
  • Structure-Activity Relationship

Substances

  • Cross-Linking Reagents
  • Photosensitizing Agents
  • Porphyrins
  • bacteriochlorin
  • chlorin
  • Glucose