2-Aminopyridinium ions were found to activate nitroalkenes toward conjugate addition of heteroaromatic compounds with low catalyst loadings and the Diels-Alder reaction with the periselectivity opposite to that observed with metal Lewis acids, raising the possibility that a 2-aminopyridinium core might be a promising catalaphore for the asymmetric catalyst design.
Alder et al., Chemische Berichte, 1938, vol. 71, p. 2451,2460
作者:Alder et al.
DOI:——
日期:——
The Synthetic Application and Mechanism of the Nef Reaction