T. Portada et al., Remarkable cumulative stereoselectivity in cyclopropanation with supramolecular Cu(I) catalytic complexes, CHEM COMMUN, (20), 2000, pp. 1993-1994
Supramolecular Cu(I) catalyst 1 exhibited 77% cumulative (dia- and enantio-
) stereoselectivity and one of the highest diastereoselectivities (86% de)
obtained to date in the cyclopropanation of styrene with ethyl diazoacetate
.