Naturally occurring thiophens. Part V. Acetylenic thiophens from the Basidiomycete Daedalea juniperina Murr
Abstract
Two new thiophen derivatives, metabolites of Daedalea juniperina Murr, have been identified as 2-lactoyl-5-(prop-1-ynyl)thiophen (IX) and 2-(prop-1-ynyl)-5-pyruvoylthiophen (XI). Syntheses of the diketone (XI) and related thiophen derivatives are described.