AbstractThree sesquiterpenes, clitocybulol A (1), B (2) and C (3), with a new carbon skeleton were isolated from the Basidiomycete Clitocybula oculus. Their structures were determined by spectroscopic methods. The nematicidal activity on a fungus-feeding nematode Aphelenchoides sp. was examined, but no activity was observed.
AbstractIntramolecular Diels-Alder cyclization in aryl allene phosphonatesleads only in 1c to the tricyclic 2,3-oxaphospholene 2, 2+2 dimerization being observed in the remaining cases.