Lars Ratjen

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The combination of Lewis acid organocatalysis and internal hydrogen-bond assistance was used to develop a new type of highly active disulfonimide catalyst. The increased Lewis acidity was documented by activity comparisons as well as theoretical investigations. Finally, the potential of the hydrogen-bond-assisted disulfonimide catalyst was demonstrated by(More)
The term vinylogy, which describes a unique property of p systems where the electron density and reactivity is amplified along conjugated bonds, was proposed 75 years ago by Fuson. The principle becomes particularly relevant in the context of the aldol reaction: While metal dienolates often furnish mixtures of aand g-addition products, the corresponding(More)
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