Managing the retro-pathway in direct catalytic asymmetric aldol reactions of thioamides
作者:Youmei Bao、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1039/c5sc02218e
日期:——
Thioamides are the preferred pronucleophiles for directcatalyticasymmetric aldol reactions in the context of soft Lewis acid/hard Bronsted base cooperative catalysis.
An anti-selective direct catalytic asymmetric aldol reaction of thiolactam is described. A soft Lewis acid/hard Brønsted base cooperative catalyst comprised of mesitylcopper/(R,R)-Ph-BPE exhibited high catalytic performance to produce an anti-aldol product with high stereoselectivity. The highly chemoselective nature of the present catalysis allows for the use of enolizable aldehydes as aldol acceptors