549504-21-4Relevant academic research and scientific papers
An expedient route to p-tert-butylthiacalix[4]arene 1,3-diethers via Mitsunobu reactions
Bitter, István,Csokai, Viktor
, p. 2261 - 2265 (2003)
Regioselective distal dialkylation of p-tert-butylthiacalix[4]arene with alcohols was performed under the Mitsunobu protocol using the DEAD/TPP system. The method provides a versatile tool for obtaining 1,3-diethers with different functional groups in the alkyl chains.
The charge control agent and toner
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Page/Page column 44; 45, (2018/06/26)
Provided is a charge controlling agent which contains at least one kind of a compound represented by the general formula (1) as active ingredient, at least 50 mol％ of above mentioned compound being a cone conformer or a partial cone conformer. In the for
An Unprecedented Photochemical Reaction for Anthracene-Containing Derivatives
Zhao, Jiang-Lin,Jiang, Xue-Kai,Wu, Chong,Wang, Chuan-Zeng,Zeng, Xi,Redshaw, Carl,Yamato, Takehiko
, p. 3217 - 3222 (2016/10/25)
A series of anthracene-containing derivatives have been synthesised and characterised. The photochemical behaviour of these derivatives have been investigated by 1H NMR spectroscopy. An unprecedented photolysis reaction for anthracene-containing derivatives was observed in the case of anthracenes directly armed with a -CH2O-R group upon UV irradiation. The photolysis reaction process has been demonstrated to occur in three steps. Firstly, the anthracene-containing derivatives are converted into the corresponding endoperoxide intermediate upon UV irradiation in the presence of air; then, the endoperoxide intermediate is decomposed to the corresponding starting compound and 9-anthraldehyde; finally, 9-anthraldehyde is further oxidised to anthraquinone. Additionally, the photolysis reaction of anthracene-containing derivatives is significantly promoted in the presence of a thiacalix[4]arene platform.
Monosubstituted lower rim thiacalix[4]arene derivatives
Lamouchi, Meriem,Jeanneau, Erwann,Chiriac, Rodica,Ceroni, Didier,Meganem, Faouzi,Brioude, Arnaud,Coleman, Anthony W.,Desroches, Cédric
experimental part, p. 2088 - 2090 (2012/07/14)
A clean and partially green route to monoalkyled thiacalix[4]arenes has been demonstrated. We have discovered that tetraalkylammonium halide can cleave selectively one of the two aryl alkyl ethers of dialkylated para-tert- butylthiacalix[4]arenes. Thus, p-tert-butyl thiacalix[4]arenes differently monoalkyled at the lower rim with acetyl, propyl, and benzyl group were synthesized in good yield.
Synthesis, crystal structure and complexation behaviour of a thiacalix[4]arene bearing 1,2,3-triazole groups
Ni, Xin-Long,Zeng, Xi,Hughes, David L.,Redshaw, Carl,Yamato, Takehiko
body text, p. 689 - 695 (2012/03/11)
The structure and complexation behaviour of 1,3-alternate-1,2,3-triazole based on thiacalix[4]arene,1,3-alternate-1 and 2 have been determined by means of X-ray analysis, fluorescence and 1H NMR spectroscopy. The X-ray results suggested that th
Synthesis and heteronuclear inclusion properties of a novel thiacalix[4]arene-based hard-soft receptor with 1,3-alternate conformation
Ni, Xin-Long,Tomiyasu, Hirotsugu,Shimizu, Tomoe,Perez-Casas, Carol,Xi, Zeng,Yamato, Takehiko
experimental part, p. 99 - 108 (2011/11/14)
A novel thiacalix[4]arene ditopic receptor with 1,3-alternate conformation and possessing two complexation sites for hard and soft cations, 5,11,17,23-tetra-tert-butyl-25,27-bis[(N,N-diethylaminocarbonyl)methoxy]-26,28-bis[(pyridylmethyl)oxy]-2,8,14,20-tetrathiacalix[4]arene is prepared. Regioselective synthesis of distal-bis[(N,N-diethylaminocarbonyl)methoxy]thiacalix[4]arene is accomplished by a protection-deprotection method using benzyl groups as a protecting group. The deprotection of benzyl group was succeeded in the presence of solid superacid (Nafion-H) under refluxing benzene. Its complexation behavior is examined by 1H-NMR titration experiments. The formation of 1:2 homo- and heteronuclear complexes demonstrates that the preorganization, subtle conformational changes and affinity have a pronounced effect on the complexation of the receptor.
Synthesis, structure and inclusion properties of distal-bis{[(5'-methyl-2, 2,-bipyridyl)-5-yl]methoxy}tetrathiacalix[4]arene with 1,2-alternate conformation
Shimizu, Tomoe,Rahman, Shofiur,Xi, Zeng,Yamato, Takehiko
experimental part, p. 104 - 108 (2009/10/15)
distal-Tetrathiacalix[4]arene having [(5'-methyl-2,2'-bipyridyl)-5-yl] methoxy group with 1,3-alternate conformation was prepared, which shows strong Ag+ affinity and the high Ag+ selectivity. The conformational change of 2,2'-bipyri
Regioselective synthesis of distal-bisalkoxytetrathiacalix[4]arenes by a protection-deprotection method using benzyl groups
Casas, Carol Perez,Yamamoto, Hideo,Yamato, Takehiko
, p. 694 - 696 (2007/10/03)
Regioselective synthesis of distal-bisalkoxytetrathiacalix[4]arenes is accomplished by a protection-deprotection method using benzyl groups as a protecting group. The deprotection of benzyl group was succeeded in the presence of AlCl3 or solid
Synthesis of all stereoisomers of sulfinylcalix[4]arenes
Morohashi, Naoya,Katagiri, Hiroshi,Iki, Nobuhiko,Yamane, Yusuke,Kabuto, Chizuko,Hattori, Tetsutaro,Miyano, Sotaro
, p. 2324 - 2333 (2007/10/03)
All four stereoisomers of p-tert-butylsulfinylcalix[4]arene [4(rccc), 4(rcct), 4(rctt), and 4(rtct)], arising from the disposition of the four sulfinyl groups with respect to the mean plane of the four bridging sulfur atoms, have been prepared via oxidati
