Conformationally mobile acyclic cucurbit[n]uril-type receptors derived from an S-shaped methylene bridged glycoluril pentamer
نویسندگان
چکیده
منابع مشابه
Methylene-Bridged Bis(imidazoline)-Derived 2-Oxopyrimidinium Salts as Catalysts for Asymmetric Michael Reactions**
Presently, nonmetal-based phase-transfer catalysts (PTCs) and organocatalysts have been deployed to great effect for these reactions. Corey et al. first reported the conjugate addition of 1 to acrylates and enones with notable enantioselectivity (> 90% ee) in the presence of an Nalkylated cinchonidine salt. Subsequently, the scope of the reaction was expanded with other modified cinchona alkalo...
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Here we show theoretically that the history of solid growth during ‘‘rapid’’ solidification must be S-shaped, in accord with the constructal law of design in nature. In the beginning the rate of solidification increases and after reaching amaximum it decreasesmonotonically as the volume of solid tends toward a plateau. The S-history is a consequence of four configurations for the flow of heat f...
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ژورنال
عنوان ژورنال: Supramolecular Chemistry
سال: 2020
ISSN: 1061-0278,1029-0478
DOI: 10.1080/10610278.2020.1795173