Answers are grounded in this paper and cite their sources.
The preparation of the Z -triene 3 is described. Internal Diels−Alder cycloaddition of 3 proceeds smoothly in the presence of BF 3 ·OEt 2 to give 2 . Ketone 2 is converted by epimerization, carbonyl extrusion, and homologation to the sesquiterpene (±)-α-oplopenone ( 1 ).
No takes yet. Share an insight, caveat, or question.
Taber et al. (1998) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: