We are pioneers in the synthesis of bambus[n]urils (BU[n]) and in the investigation of their supramolecular properties. These macrocyclic compounds are based on glycoluril building blocks similarly to cucurbiturils. Unusual arrangement of glycoluril units provide bambusurils with ability to act as anion receptors with high affinity and selectivity for various anions in both organic solvent mixtures and water. For instance, we showed that a bambusuril derivative recognizes and quantifies toxic perchlorate at 0.1 μM concentration in pure water.
Yawer, M. A.; Havel, V.; Šindelář, V.: A Bambusuril Macrocycle that Binds Anions in Water with High Affinity and Selectivity. Angewandte Chemie-International Edition, 2015, 54, 276-279 link
Havel, V.; Yawer, M. A.; Šindelář, V.: Real-time analysis of multiple anion mixtures in aqueous media using a single receptor Chemical Communications, 2015, 51, 4666-4669 link
Havel, V.; Švec, J.; Wimmerová, M.; Dušek, M.; Pojarová, M.; Šindelář, V. : Bambus[n]urils: a New Family of Macrocyclic Anion Receptors. Organic Letters, 2011, 13, 4000–4003 . link
Švec, J.; Nečas, M.; Šindelář, V.: Bambusuril. Angewandte Chemie-International Edition 2010, 49, 2378-2381. link
Cucurbit[n]urils (CB[n]) are water soluble macrocycles which are able to form highly stable supramolecular complexes with positively charged and neutral guests. We investigate the interaction of CB[n] with organic cations in order to design and synthesize molecular shuttles and swiches which can be driven by external input. Our effort to synthesis CB[n] derivatives resulted in first cucurbituril with a substituent attached solely to one methylene bridge. We also prepared CB[n] analog - pressocucurbituril.
Ustrnul, L.; Kulhánek P.; Lízal, T.; Šindelář, V.: Pressocucurbituril. Organic Letters, 2015, 17, 1022-1025 link
Gilberg, L.; Khan, M. S. A.; Enderesová, M.; Šindelář, V.: Cucurbiturils Substituted on the Methylene Bridge. Organic Letters, 2014, 16, 2446-2449 link
Koman, V.; Khan, M. S. A.; Babinský, M.; Marek, R.; Šindelář, V.: Supramolecular Shuttle Based on Inclusion Complex between Cucurbituril and Bispyridinium Ethylene. Organic Letters, 2011, 13, 6148-6151. link
Acyclic glycoluril oligomers
Cucurbit[n]urils (CBn) are generally prepared by polycondensation reaction between glycoluril and formaldehyde. However, this reaction results in limited number of products (n = 5 – 10) which separation is usually very difficult. In this project we investigate new synthetic approach, which allows the controlled preparation of new glycoluril oligomers and their transformation into macrocyclic structure. The ability of these compounds to behave as host molecules is also tested.
Štancl, M.; Gilberg, L.; Ustrnul, L.; Nečas, M.; Šindelář, V.: Synthesis and supramolecular properties of glycoluril tetramer. Supramolecular Chemistry, 2014, 26, 168-172 link
Štancl, M.; Hodáň, M.; Šindelář, V.: Glycoluril Trimers: Selective Synthesis and Supramolecular Properties. Organic Letters 2009, 11, 4184-4187. link