Synthesis of furo[3,2-c]coumarin derivatives using visible-light-promoted radical alkyne insertion with bromocoumarins

Org Biomol Chem. 2016 Jul 7;14(25):6065-70. doi: 10.1039/c6ob00768f. Epub 2016 May 31.

Abstract

The synthesis of privileged structures, which are potent drug candidates, is an impetus for drug discovery. The construction of heterocyclic framework furo[3,2-c]coumarins using a visible-light promoted photoredox neutral coupling of 3-bromo-4-hydroxycoumarins with commercially available alkynes has been reported. These reactions can be carried out at room temperature under visible light irradiation with good chemical yields. This work presents 17 furocoumarins, 12 of which are new. Three of the newly synthesized compounds show potent cytotoxicity, and one shows moderate acetylcholinesterase inhibitory activity with IC50 values of 2.16 ± 0.13 μM.

MeSH terms

  • Alkynes / chemistry*
  • Antineoplastic Agents / chemical synthesis*
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology
  • Chemistry Techniques, Synthetic
  • Coumarins / chemical synthesis*
  • Coumarins / chemistry
  • Coumarins / pharmacology
  • Free Radicals / chemistry
  • HL-60 Cells
  • Halogenation*
  • Humans
  • Light*
  • Temperature

Substances

  • Alkynes
  • Antineoplastic Agents
  • Coumarins
  • Free Radicals