1-Mesityl-2,2,2-trifluoroethanol, an outstanding new chiral controller for catalyzed diels-alder reactions

Abstract The R 2 AlCl-catalyzed Diels-Alder reactions of cyclopentadiene with the (R)-1-mesityl-2,2,2-trifluoroethyl esters of acrylic and fumaric acid proceed with ⪢ 97:3 diastereoselectivity.