Answers are grounded in this paper and cite their sources.
A novel Lewis acid catalyzed tandem cyclization reaction of internal alkynols and vinyl azides has been achieved to afford a series of products containing a pyran-based indeno[1,2-c]isochromene scaffold in moderate to high yields. This tandem polycyclization protocol provides a straightforward entry to construct the complex polycyclic skeleton through cycloisomerization, formal [4 + 2] cycloaddition, and an elimination process.
No takes yet. Share an insight, caveat, or question.
Siyang et al. (2015) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: