Chiral C1-symmetric diaminothiophosphoramide–Cu(I) catalyzed asymmetric addition of diethylzinc to N-sulfonylimines
作者:Min Shi、Wen Zhang
DOI:10.1016/j.tetasy.2003.09.031
日期:2003.10
In the presence of a catalytic amount of chiral diaminothiophosphoramide L7 (6 mol%) and Cu(I) (3 mol%), the asymmetric addition of diethylzinc to N-sulfonylimines could be achieved in good yields with moderate to good e.e. (50-74% e.e.) at 0degreesC in toluene. A novel chiral diaminothiophosphoramide ligand system for this asymmetric addition reaction has been explored. (C) 2003 Elsevier Ltd. All rights reserved.
Chiral Binaphthylthiophosphoramide−Cu(I)-Catalyzed Asymmetric Addition of Diethylzinc to <i>N</i>-Sulfonylimines
作者:Chun-Jiang Wang、Min Shi
DOI:10.1021/jo034269n
日期:2003.8.1
In the presence of a catalytic amount of chiral binaphthylthiophosphoramide L2 (6 mol %) and Cu(I) (3 mol %), the asymmetric addition of diethylzinc to N-sulfonylimines could be achieved in good yields with moderate to high ee (63-93% ee) at 0 degreesC in toluene. A novel chiral binaphthylthiophosphoramide ligand system for this asymmetric addition reaction has been explored.
PFAM catalyzed enantioselective diethylzinc addition to imines
作者:Özdemir DOĞAN、Eda ÇAĞLI
DOI:10.3906/kim-1410-29
日期:——
Chiral amines are important starting materials for the synthesis of biologically important compounds. Enantioselective addition of dialkylzinc reagents to imines is a reliable method for the synthesis of these compounds. Different chiral catalysts were developed and used for this method. Phosphorous based PFAM catalysts were tried for the first time in the enantioselective synthesis of amines by reacting diethylzinc with N-sulfonyl imines and N-diphenylphosphinoyl imines. Chiral amines were isolated with moderate to acceptable yields and enantioselectivities.