Intramolecular ring-opening reactions of 1-(2-methoxypheny1)-6-oxabicyclo[3.2.0]heptanes: Spirocyclic dihydrobenzofurans from fused bicyclic oxetanes

摘要

Treatment of fused oxetanes with Et2AlCl, TMSCl, acetyl chloride, or ethereal hydrochloric acid leads to the formation of spirocyclic dihydrobenzofurans through intramolecular attack of an oxygen atom of a proximal phenolic methyl ether.