Uncatalyzed aldol reaction using a dimethylsilyl enolate and α-dimethylsilyl ester in N,N-dimethylformamide
摘要:
Dimethylsilyl enolates and alpha-dimethylsilyl esters reacted with aldehydes in N,N-dimethyl-formamide without an activator to give aldol adducts in moderate to good yields. Under the same conditions, the corresponding trimethylsilyl derivatives exhibited lower reactivities toward the aldol reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.
Rhenium complex-catalyzed allylation of aldehydes with allyltributylstannane
作者:Yutaka Nishiyama、Fujio Kakushou、Noboru Sonoda
DOI:10.1016/j.tetlet.2004.12.022
日期:2005.1
was confirmed that the rhenium complex, ReBr(CO)5, catalyzed the allylation of aldehydes with allyltributylstannane to give the corresponding homoallylic alcohols in moderate to good yields. Similarly, the reaction of aldehydes with enol silyl ether was efficiently promoted by the rhenium catalyst to afford the corresponding β-hydroxy carbonylcompounds.
Studies of the zinc(II) catalysed addition of silyl enol ethers to cyclic enol ethers
作者:J.R. Studley、M. Wills
DOI:10.1016/0022-328x(93)80412-5
日期:1993.8
The addition of silyl enolethers to cyclic enolethers by zinc dibromide catalysed electrophilicaddition of a phenylsulphenyl group has been shown to give exclusively the trans- diastereoisomer when the silyl enolether of acetophenone is used. The same reaction was catalysed by a zinc(II) alkoxyamine complex, but the use of the chiral ligand (+)- cinchonine in this reaction did not result in any