Tribenzylbutyrolactones and Dibenzyldiphenyl-4,5,6,7-tetrahydrobenzofuranones from Kyrtuthrix maculans
Ten novel compounds, maculalactones B-K (2-11), have been isolated from the marine cyanobacterium Kyrtuthrix maculans. Their structures, which involve either three benzyl groups substituted on a butyrolactone ring or two benzyl and two phenyl groups substituted on a 4,5,6,7-tetrahydrobenzofuranone nucleus, were determined by 2D NMR spectroscopy. Some speculation is made concerning the biogenesis of these two novel classes of natural products.
Lee
SC
The Department of Ecology and Biodiversity and The Swire Institute of Marine Sciences, The University of Hong Kong, and Department of Chemistry, The University of Hong Kong, Pokfulam Rd., Hong Kong.
Brown
GD