Intramolecular Diels-Alder reactions of furan derivatives: Steric and electronic effects of trifluoromethyl groups
Intramolecular Diels-Alder reactions of furan derivatives each containing a trifluoromethyl group in the dienophilic part or the tethering chain of the dienophile to the furan ring showed a notable electronic effect of the trifluoromethyl group on the ste