Novel Entry into 5-Decarboxydibenzofurans via Smiles Rearrangement of the Lichen Para-Depside, Erythrin

Author:

Thadhani Vinitha M.1,Choudhary Muhammad Iqbal2,Andersen Raymond J.3,Karunaratne Veranja1

Affiliation:

1. Department of Chemistry, University of Peradeniya, Peradeniya, Sri Lanka

2. H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan

3. Departments of Chemistry & Earth and Ocean Sciences, University of British Columbia, Vancouver, B.C., Canada V6T 1Z1

Abstract

Erythrin, isolated in 7.3% yield from the lichen Roccella montagnei, was converted via a Smiles rearrangement to a series of diphenyl ethers. Those with a free carboxylic acid at C-1 underwent a novel decarboxylative oxidative cyclisation in the presence of Pd(OAc)2 to produce 5-decarboxydibenzofurans. All compounds were assayed for their antioxidant and β-glucuronidase enzyme inhibitory activity.

Publisher

SAGE Publications

Subject

General Chemistry

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