118463-56-2

Upstream product

• 104416-43-5 3-(2-(4'-methylphenyl)-1-buten-4-yl)-4-hydroxycoumarin 

Downstream Products

• 118463-61-9 2-(4-methylphenyl)methyl-3,4-dihydro-2H,5H-pyrano<3,2-c><1>benzopyran-5-one 
• 118463-60-8 3-(4-methylphenyl)-2,3,4,5-tetrahydro-6H-oxepino<3,2-c><1>benzopyran-6-one 

Relevant academic research and scientific papers

A new regioselective synthesis of 2,3,4,5-tetrahydro-6H-oxepino[3,2-c]pyran-6-ones, and [1]benzopyran-6-ones

Through an anti-Markovnikow hydration of some olefin derivatives of 4-hydroxy-2-pyrones, and 4-hydroxy-coumarins, followed by a regioselective intramolecular dehydration, involving the primary alcohols obtained and the enolic oxygen of the rings, promoted by Amberlyst 15 in boiling toluene, the new heterocycles 2,3,4,5-tetrahydro-6H-oxepino[3,2-c]pyran-6-one and [1]benzopyran-6-ones, were obtained in fair yields.