The application of chiral phosphine-Schiff base type ligands in silver(I)-catalyzed asymmetric vinylogous Mannich reaction of aldimines with trimethylsiloxyfuran
作者:Zhi-Liang Yuan、Jia-Jun Jiang、Min Shi
DOI:10.1016/j.tet.2009.05.080
日期:2009.8
Catalytic asymmetric vinylogous Mannich (AVM) reactions of readily available aldimines with trimethylsiloxyfuran in the presence of catalytic amount of AgOAc and chiralphosphine-Schiffbasetypeligands are described, affording the corresponding products in up to 91% yield, anti/syn >99:1 and 81% ee.
描述了在催化量的AgOAc和手性膦-席夫碱型配体存在下,易于获得的醛亚胺与三甲基甲硅烷氧基呋喃的催化不对称乙烯基乙烯基曼尼希(AVM)反应,可提供高达91%的收率的相应产品,抗/ syn > 99: 1和81%ee。
Axially Chiral Phosphine-Oxazoline Ligands in Silver(I)- Catalyzed Asymmetric Mannich Reaction of Aldimines with Trimethylsiloxyfuran
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1002/adsc.200900550
日期:2009.11
A new asymmetric catalytic system for the Mannichreaction of aldimines with trimethylsiloxyfuran is described. The combination of an axiallychiralphosphine-oxazolineligand (S)-2-[(R)-2′-(diphenylphosphino)-1,1′-binaphthyl-2-yl]-4-phenyl-4,5-dihydrooxazole with silver acetate and 2,2,2-trifluoroacetic acid is a very effective catalytic system in the asymmetricMannichreaction of various aldimines