Titlebook: Aldol Reactions; Rainer Mahrwald Book 2009 Springer Science+Business Media B.V. 2009 Aldol Additions.Aldol Methodologies.Base.Enzymes.Lewi

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Book 2009nthesis of natural products are discussed. Great importance is set to the diverse possibilities of the manual of aldol reaction to install required configurations in complicated natural product synthesis..

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https://doi.org/10.1007/978-3-642-69897-2esponding lithium enolates. The stereochemical outcome strongly depends on the geometry of the boron enolates used in these reactions. (.)-Enolates provide the .-configured aldol adducts, whereas .-aldol adducts were formed by (Z)-enolates.. These results are illustrated by the transitions states shown in Scheme 2.3.1.

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Boron Enolates,esponding lithium enolates. The stereochemical outcome strongly depends on the geometry of the boron enolates used in these reactions. (.)-Enolates provide the .-configured aldol adducts, whereas .-aldol adducts were formed by (Z)-enolates.. These results are illustrated by the transitions states shown in Scheme 2.3.1.

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Catalytic Aldol Additions, a simple working model based on repulsive forces only. The influence of different Lewis acids, the influence of different substituents and the fate of silyl group during the reaction were not involved in this model. For further discussion and mechanistic understanding see Hiraiwa et al. and others..

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Aldol Reactions with Preformed Enolates,which is based on the use of chiral lactones.. Aldehydes and unsymmetrical ketones were added to lithium enolates of readily available chiral acetales derived from lactic acid, mandelic acid or amino acids.. High stereo selectivities were achieved. Liebeskind and Davies demonstrated that optically a