The Addition of Trimethylsilyl Cyanid to Carbonyl Compounds Using Yb(OTf)<sub>3</sub> as Lewis Acid Catalyst
作者:Yang Yang、Dong Wang
DOI:10.1055/s-1997-1071
日期:——
Yb(OTf)3 was found to be an effective catalyst in the addition of TMSCN to various carbonyl compounds. Highly chemoselective process was observed in the reactions of α-keto aldehyde acetals. Catalyst Yb(OTf)3 is tolerant to the hydroxy group of glyoxylate hydrates used. Catalytic diastereoselective trimethylsilylcyanation of chiral aldehydes and cyanation of glyoxylate hydrates can be carried out under mild condition with moderate de.
Yb(OTf)3 catalysed allylation of the hydrates of α-keto aldehydes and glyoxylates with allylsilane
作者:Yang Yang、Mingwen Wang、Dong Wang
DOI:10.1039/a704560c
日期:——
Yb(OTf)
3
catalysed allylation reactions of the hydrates of
α-keto aldehydes and glyoxylates with allyltrimethylsilane at room
temperature give α-keto and α-ester homoallylic alcohols in
good yield.
Catalytic allylation of hydrates of ?-keto aldehydes and glyoxylates with allyltrimethylsilane using non-fluorine-containing sulfonic acids as catalysts
Verfahren zur kontinuierlichen Herstellung von Glyoxylsäure
申请人:Chemie Linz Gesellschaft m.b.H.
公开号:EP0401533A1
公开(公告)日:1990-12-12
Verfahren zur kontinuierlichen Herstellung einer konzentrierten wäßrigen Lösung von Glyoxylsäure durch Hydrolyse von Glyoxylsäureesterhemiacetalen, indem man Glyoxylsäureesterhemiacetale in einer Reaktorkaskade mit Wasserdampf im Gegenstrom behandelt.