Beilstein J. Org. Chem.2019,15, 1304–1312, doi:10.3762/bjoc.15.129
presence of strong Lewis acids [36]. We herein report the design and exploration of a new trityl carbocation that has a chiral weakly coordinating Fe(III)-basedphosphateanion for the effective asymmetric catalysis in the Diels–Alder reaction of anthracenes.
Results and Discussion
In our previous work, we
of a highly active carbocation Lewis acid catalyst. The stereocontrol potential of the chiral tritylium ion pair was demonstrated by its application in an enantioselective Diels–Alder reaction of anthracene.
Keywords: anthracene; carbocation catalysis; Diels–Alder reaction; Fe(III)-basedphosphate
anion; tritylium salt; Introduction
Carbocation Lewis acid catalysis has grown significantly over the last two decades [1][2][3][4][5][6][7][8][9][10][11][12][13]. The development of asymmetric carbocation catalysts has been long pursued but remains a challenging task. One strategy is to design and