S. Bromidge et al., A PARALLEL COMBINATORIAL APPROACH TO LOCATING HOMOCHIRAL LEWIS-ACID CATALYSTS FOR THE ASYMMETRIC AZA-DIELS-ALDER REACTION OF AN IMINO DIENOPHILE, Tetrahedron letters, 39(48), 1998, pp. 8905-8908
New catalytic asymmetric Lewis acids have been developed for the aza-D
iels-Alder reaction of a methyl glyoxalate and p-anisidine derived imi
ne with Danishefsky's diene. The catalysts were developed using parall
el combinatorial methods with the highest e.e, being 97 % using (1S, 2
S)-1,2-diphenylthylenediamine and magnesium iodide in acetanitrile. (C
) 1998 Elsevier Science Ltd. All rights reserved.