Article ID Journal Published Year Pages File Type
5281344 Tetrahedron Letters 2010 5 Pages PDF
Abstract

We have designed and synthesized N-arylprolinamides 7-10 with a potential to involve in the binding of electrophilic aldehydes via two N-H⋯O hydrogen bonds for application in organocatalytic aldol reactions. The catalyst 10 is shown to afford aldol products in excellent isolated yields with very high diastereo- and enantioselectivites. In addition to enhanced acidity and double hydrogen bonding, the stacking interactions of the p-toluenesulfonyl ring in 10 with the electrophilic aldehyde are proposed to stabilize the transition state.

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Physical Sciences and Engineering Chemistry Organic Chemistry
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