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
Axially chiral phosphine–oxazoline ligands in silver(I)-catalyzed asymmetric Mannich reaction of N-Boc aldimines with trimethylsiloxyfuran
作者:Qian-Yi Zhao、Min Shi
DOI:10.1016/j.tet.2011.03.046
日期:2011.5
Axiallychiralphosphine–oxazolineligand L6 was found to be a fairly effective chiralligand in silver(I)-catalyzed asymmetricMannichreaction of N-Boc aldimines with trimethylsiloxyfuran to give the corresponding adducts in up to 97% yield, 7:1 dr and 86% ee (major diastereoisomer).