Tris(pentafluorophenyl)silyl enol ethers: synthesis and aldol reactions
摘要:
Silyl enol ethers bearing three pentafluorophenyl groups at the silicon atom are described. These Compounds undergo uncatalyzed aldol reactions with aliphatic, alpha,beta-unsaturated, and aromatic aldehydes. The observed reactivity is analyzed in terms of the Lewis acidity of the silyl fragment. (C) 2004 Elsevier Ltd. All rights reserved.
A useful synthetic equivalent of an acetone enolate
作者:Veselin Maslak、Zorana Tokic-Vujosevic、Zorana Ferjancic、Radomir N. Saicic
DOI:10.1016/j.tetlet.2009.09.113
日期:2009.12
2-Methoxymethoxy-3-chloropropene derived organometallics act as synthetic equivalents of an acetone enolate. Indium-promoted reaction of this reagent with aldehydes affords aldol adducts in moderate to excellent yields. When the reaction was performed with zinc, aldol products were isolated in protected form as the corresponding MOM-enol ethers. (C) 2009 Elsevier Ltd. All rights reserved.