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The 10α,20β-bis(4-nitrophenyl)-calix[4]pyrrole was found to act as an effective organocatalyst for the hetero Diels-Alder reaction of Danishefsky’s diene with aromatic aldehydes. This discovery is the first reported case of a calixpyrrole that exhibits organocatalytic activity. 相似文献
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Kent A. Nielsen 《Tetrahedron letters》2012,53(42):5616-5618
The interaction and colorimetric sensing properties of a tetrathiafulvalene substituted calix[4]pyrrole sensor with anions were investigated using 1H NMR and absorption spectroscopic techniques. Visual color changes were observed upon addition of different anions (Cl−, Br−, CN−, and AcO−) to a solution of the sensor. 相似文献
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Anna BarattucciPaola Bonaccorsi Grazia Cafeo Franz H. KohnkeTeresa Papalia 《Tetrahedron》2011,67(39):7548-7556
The synthesis of six new calix[4]pyrroles, containing sulfur-substituted phenylene units is reported. Halogen-anions and organic aromatic mono- and bis-anions have been selected to explore the formation of host-guest complexes and the possible self-assembly of multi-component structures with the six calixpyrroles. The type of aryl substitution modulates the strength of binding and the selectivity towards different anions and, in some cases, the combination of receptors and bis-anionic precursors, offers a way to build systems in which capsular assemblies are observed. 相似文献
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