Answers are grounded in this paper and cite their sources.
The Lewis acid catalyzed cyclization of squalene analogues which are constrained at the 11,12 bond leads to products with BCD ring structures typical of terpenoids. The structure of the product given in the example in Equation (1) was determined by X-ray diffraction studies.
No takes yet. Share an insight, caveat, or question.
Zhou et al. (2000) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: