## Abstract The combination of Ga(OTf)~3~ with chiral semiβcrown ligands (**1a**β**e**) generates highly effective chiral gallium Lewis acid catalysts for aqueous asymmetric aldol reactions of aromatic silyl enol ethers with aldehydes. A ligandβacceleration effect was observed. Water is essential f
β¦ LIBER β¦
Asymmetric Mukaiyama-Aldol Reaction in Aqueous Media Promoted by Zinc-Based Chiral Lewis Acids
β Scribed by Jacek Mlynarski; Joanna Jankowska
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 76 KB
- Volume
- 347
- Category
- Article
- ISSN
- 1615-4150
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β¦ Synopsis
Asymmetric aldol reactions in aqueous media have been realized by using zinc-based chiral Lewis acids. The aldol products have been obtained with high yield, diastereocontrol and a good level of enantioselectivity. The reactivity of both acetophenone and propiophenone enol ether surrogates was tested with a range of aldehydes.
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