Sulfonamide Ligands from Chiral Aziridines − Application to the Titanium-Mediated Addition of Diethylzinc to Benzaldehyde
作者:Fredrik Lake、Christina Moberg
DOI:10.1002/1099-0690(200209)2002:18<3179::aid-ejoc3179>3.0.co;2-a
日期:——
A modular approach was developed for the preparation of chiral, enantiopure sulfonamide ligands with C-1, C-2, and C-3 symmetry by ring opening of chiral N-sulfonylaziridines with ammonia, primary amines, and diamines. The new ligands were assessed in the titanium-mediated addition of diethylzinc to benzaldehyde, giving the product with selectivities up to 76% ee. ((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002).