Self‐assembled catalyst: A new kind of chiral supramolecular organocatalyst, self‐assembled from chiral amines and poly(alkene glycol)s, was developed. The resulting self‐assemblies were found to be highlyefficient in the asymmetriccatalysis of the unusual Diels–Alder reaction between cyclohexenones and nitrodienes, nitroenynes or nitroolefins, giving excellent chemo‐, regio‐ and enantioselectivities
Enantioselective Organocatalytic Conjugate Addition of Aromatic Ketones to Nitrodienes
作者:Xin-Yan Wu、Tianxiong He、Jing-Ying Qian、Hong-Liang Song
DOI:10.1055/s-0029-1218310
日期:2009.12
The organocatalytic asymmetric nitro-Michael addition of aromatic ketones to nitrodiene using various chiral primary amine thioureas was described. In the presence of 30 mol% of N-[(1R,2R)-2-amino-1,2-diphenylethyl]-N′-benzylthiourea, the Michael adducts were obtained in good yields and excellent enantioselectivity (94-98% ee).