Answers are grounded in this paper and cite their sources.
Ring oxygenated coumarins were obtained in a single‐step by condensation of appropriately substituted phenols with acetylenic esters by catalytic amounts of indium chloride in the absence of solvent.
No takes yet. Share an insight, caveat, or question.
Kalyanam et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: