Ein selbstorganisiertes Calix[4]arendimer, verbunden über H-verknüpfte 2-Ureidopyrimidin-4(1H)-on-Gruppen

González, J. J.; Prados, Pilar; Mendoza, Javier de

doi:10.1002/(sici)1521-3757(19990215)111:4<546::aid-ange546>3.0.co;2-6

Cited by 19 publications

(1 citation statement)

References 23 publications

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“…de Mendoza und Mitarbeiter haben die Dimerisierung von Calix [4]arenen beschrieben, die mit zwei 2-Ureidopyrimidin-4(1H)-on-Einheiten funktionalisiert waren. [104] ¾hnlich wie für die Assoziate von Meijer, werden im 1 H-NMR-Spektrum die Signale verschiedener tautomerer Strukturen beobachtet. Der Komplex ist thermodynamisch ausgesprochen stabil, da die Dissoziation die simultante Spaltung von acht kooperativen H-Brücken erfordert.…”

Section: -H-brückenmoduleunclassified

Nichtkovalente Synthese mit Wasserstoffbrücken

2001

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Section: -H-brückenmoduleunclassified

Nichtkovalente Synthese mit Wasserstoffbrücken

2001

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Dimeric Capsules by the Self‐Assembly of Triureidocalix[6]arenes through Hydrogen Bonds

González

Ferdani

Albertini

et al. 1999

Chemistry A European J

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A number of calix[6]arenes bearing ureas at the upper rim positions of alternate rings 1, 3 and 5 were prepared and studied in detail by NMR spectroscopy and gel permeation chromatography. N-Unsubstituted ureas were shown to dimerize through a cyclic array of hydrogen bonds to give cylindrical cavities capable of encapsulating small molecules such as dichloromethane, benzene and fluorobenzene. Slow equilibria between dimer and monomer were observed in [D6]DMSO-CDCl3 mixtures. By contrast, N-substituted ureas are monomeric. All urea monomers with bulky O-substituents display a solvent-dependent, slow equilibrium between C3v and Cs cone conformations.

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Polymerization of Ureidopyrimidinone-Functionalized Olefins by Using Late-Transition Metal Ziegler-Natta Catalysts: Synthesis of Thermoplastic Elastomeric Polyolefins

2001

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Many natural and synthetic polymers derive their unique functions and precise structures from hydrogen bonding. The double-helix conformation of DNA and the secondary structures of many proteins, both vital to the central mechanisms of living organisms, depend strongly upon the formation of specific hydrogen bonds. The amazing tensile strength and elasticity observed in spider silk results from strong intra-and intermolecular hydrogen bonds that stabilize the formation of helices and b-sheets. [1] Hydrogen bonding between polymer chains also dictates the mechanical properties of many synthetic polymers: the high tensile strength of aromatic polyamides [2] and the elastomeric properties of polyurethane block copolymers [3] arise from intermolecular hydrogen bonding.

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Ein selbstorganisiertes Calix[4]arendimer, verbunden über H-verknüpfte 2-Ureidopyrimidin-4(1H)-on-Gruppen

Cited by 19 publications

References 23 publications

Nichtkovalente Synthese mit Wasserstoffbrücken

Nichtkovalente Synthese mit Wasserstoffbrücken

Dimeric Capsules by the Self‐Assembly of Triureidocalix[6]arenes through Hydrogen Bonds

Polymerization of Ureidopyrimidinone-Functionalized Olefins by Using Late-Transition Metal Ziegler-Natta Catalysts: Synthesis of Thermoplastic Elastomeric Polyolefins

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