The absolute configuration of (−)-pyricuol, a phytotoxin isolated from riceblast disease fungusMagnaporthegrisea, was determined to be R by synthetic studies.
Synthesis and plant growth inhibitory activity of both enantiomers of pyricuol, a phytotoxin isolated from rice blast disease fungus Magnaporthe grisea
Both enantiomers and racemate of pyricuol, a phytotoxin isolated from the riceblast disease fungus, Magnaporthegrisea, have been synthesized by using Stille coupling and [2,3]-Wittig rearrangement reactions as the key steps. Both enantiomers induced dark necrotic lesions on rice leaves almost equally, but did not affect the growth of rice second leaf sheath and the germination of lettuce. Only natural