On the Use of Ferrocenyl Cations as Chiral Lewis Acids: Evidence for Protic Acid Catalysis

Article abstract of DOI:10.1016/00404-0399(50)1440S-

The preparation of cation 1 is described, as is the use of this material as a catalyst in the Diels-Alder reaction.While the addition of 1 does promote the Diels-Alder reaction, it is not the catalytic species.Rather, it acts as a source of protic acid wh