Technical Notes:
1.Friedel-Crafts Addition: It has been shown that catalytic amounts (10-20 mol%) of novel axially chiral bis- arylthioureas promote the asymmetric organocatalytic F riedel-Crafts type addition of indole and N-
methylindole to nitroolefins.
References:
1.Tetrahedron Lett., 2006, 47, 7037-7042.