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The conversion and stereoselectivity of transformation to endo and exo norbornene derivatives was determined in the Diels–Alder reaction of cyclopentadiene with alkyl acrylates. The reactions were carried out in the pyrrolidinium ionic liquids in the presence of metal chlorides and trifluoromethanesulfonates as the catalysts. Shorter reaction times and higher conversions of dienophile were observed...
Phosphonium ionic liquid (IL)—trihexyl-tetradecylphosphonium bis(trifluoromethylsulfonyl)imide, has been tested as the medium in the Diels–Alder reaction between cyclopentadiene and dienophiles from the group of α,β-unsaturated esters, aldehydes and ketones. Catalytic activities of a few metal chlorides, triflates and bis-triflimides in this reaction have been compared. The recycling of the catalyst...
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