740804-03-9Relevant articles and documents
Comparative study of azobenzene and stilbene bridged crown ether p-tert-butylcalix[4]arene
Rojanathanes, Rojrit,Pipoosananakaton, Bongkot,Tuntulani, Thawatchai,Bhanthumnavin, Worawan,Orton, James B.,Cole, Simon J.,Hursthouse, Michael B.,Grossel, Martin C.,Sukwattanasinitt, Mongkol
, p. 1317 - 1324 (2005)
Photo-switchable calixarenes consisting of a stilbene or azobenzene bridge, spanning the narrow rim as a switching unit, were synthesized through reductive coupling of o-, m- and p-bis-benzaldehyde and bis-nitrobenzene-substituted calix[4]arenes. Both cis- and trans-stilbenes were produced from the reductive coupling of the o- and m-bis-benzaldehyde with the cis isomer being predominant for both regioisomers, whilst the coupling of p-bis-benzaldehyde gave only cis product. On the other hand, the only isolable product obtained from the reductive coupling of bis-o- and bis-m-nitrobenzene was the corresponding trans-azobenzene and the coupling product from bis-p-nitrobenzene was not stable. Each of the synthesized compounds showed a photostationary state in their cis-trans isomerization. The complexation of alkali metal ions was observed for only the o-azobenzene derivative suggesting that the lone pair of N-atom in the azo bridge participates in this process.
Novel symmetrical triads of triphenylene-calix[4]arene-triphenylene: Synthesis and mesomorphism
Yang, Fafu,Xu, Bingting,Guo, Hongyu,Xie, Jianwei
supporting information; experimental part, p. 1598 - 1602 (2012/04/10)
Two novel symmetrical triads of triphenylene-calix[4]arene-triphenylene bridged by aromatic amido or hydrazone spacers were synthesized with stepwise procedures in yields of 67% and 68%, respectively. They exhibited interesting mesomorphic behavior of tri
Novel redox receptors for ion-pair and α-amino acid: Synthesis and complexation properties of calix[4]arene derivatives bearing large conjugated ferrocene groups
Yang, Fafu,Liu, Zhiqiang,Hong, Biqiong,Guo, Hongyu
scheme or table, p. 183 - 188 (2012/08/14)
By reacting calix[4]arene 1,3-bi-hydrazide derivative (2) with formacylferrocene in " 1 + 2" condensation mode, novel calix[4]arene derivative bearing two conjugated ferrocene groups (3) was obtained in yield of 88%. By reacting 1,3-bi-substituted [2-(p-f
Syntheses of novel chiral calix[4]crown: Lariat calix[4]-1,3-aza-crowns with chiral amino acid groups as branched chains
Yang, Fafu,Liu, Zhiqiang,Huang, Zhisheng,Guo, Hongyu,Hong, Biqiong
scheme or table, p. 3485 - 3490 (2011/10/02)
The first examples of lariat calix[4]-1,3-aza-crowns with chiral amino acid groups as branched chains (5a and 5b) were designed and synthesized via a 1+1 addition reaction of calix[4]-1,3-substituted benzaldehyde derivative (4) and amino acid hydrazide derivatives (3a and 3b) in yields of 70% and 75%, respectively. The preliminary extraction experiments suggested that hosts 5a and 5b possessed good complexation abilities for-amino acids.
Synthesis of novel chiral calix[4]crown: Lariat calix[4]-1,3-aza-crown with chiral amino acid group as branched chain
Yang, Fafu,Hong, Biqiong,Guo, Hongyu,Huang, Zhisheng,Zhang, Xiaoyi
scheme or table, p. 358 - 360 (2012/05/31)
The novel lariat calix[4]-1,3-aza-crowns with chiral amino acids groups as branched chain (5a) and (5b) were synthesized via "1+1" addition of calix[4]-1,3-substituted benzaldehyde derivative (4) and amino acids hydrazide derivatives (3a) and (3b) in yields of 70% and 75%, respectively.
Design and syntheses of novel calix[4](aza)crowns: Neutral receptors for α-amino acids
Yang, Fafu,Ji, Yanqing,Guo, Hongyu,Lin, Jianrong,Peng, Qi
, p. 79 - 85 (2007/10/03)
A series of novel calix[4](aza)crowns 2a-2d containing acylhydrazone groups was designed and synthesized via 1+1 condensation of calix[4]-1,3-substituted benzaldehyde derivative 1 with bis-hydrazides in 85-90% yields. They showed good complexation abiliti
Synthesis of tripodal aza crown ether calix[4]arenes and their supramolecular chemistry with transition-, alkali metal ions and anions
Tuntulani, Thawatchai,Thavornyutikarn, Praput,Poompradub, Sirilux,Jaiboon, Nongnuj,Ruangpornvisuti, Vithaya,Chaichit, Narongsak,Asfari, Zouhair,Vicens, Jacques
, p. 10277 - 10285 (2007/10/03)
Tripodal aza crown ether calix[4]arenes, 5a, 5b, 6a and 6b, have been synthesized. The structure of protonated 5a was elucidated by X-ray crystallography to be a self-threaded rotaxane. Complexation studies of 5a and 5b towards anions using Na+
Aza crown ether calix[4]arenes containing cation and anion binding sites: Effects of metal ions towards anion binding ability
Tuntulani, Thawatchai,Poompradub, Sirilux,Thavornyutikarn, Praput,Jaiboon, Nongnuj,Ruangpornvisuti, Vithaya,Chaichit, Narongsak,Asfari, Zouhair,Vicens, Jacques
, p. 5541 - 5544 (2007/10/03)
Tripodal aza crown ether calix[4]arenes containing both cation and anion binding sites (5a and 5b) have been synthesized. The X-ray analysis shows that 5a forms a self-threaded rotaxane-like structure in the solid state. 1H NMR titrations of the two ligands with various halide anions indicate that 5a and 5b can form complexes with Br- and I- but not F-. However, both compounds form more stable complexes with I- than with Br- in the presence of Bu4N+. The presence of K+ enhances the binding ability of 5a towards Br-.
