135288-39-0Relevant academic research and scientific papers
syn-1,2-dialkylated calix[4]arenes: General intermediates in the NaH/DMF tetraalkylation of calix[4]arenes
Groenen,Ruel,Casnati,Timmerman,Verboom,Harkema,Pochini,Ungaro,Reinhoudt
, p. 2675 - 2678 (1991)
In DMF or acetonitrile with NaH as a base at room temperature the tetraalkylation of calix[4]arenes 1a and 1b proceeds via the syn-1,2-disubstituted products to the tetraalkylated calix[4]arenes in the cone conformation. With KH as a base the tetraalkylated calix[4]arenes are predominantly formed in the partial cone conformation, and the reaction proceeds via both the syn-1,3-di and the syn-1,2-disubstituted products. Also the solvent influences the pathway via which tetraalkylation takes place. The syn-1,2-disubstituted calix[4]arenes 2-6 can be isolated in 15-55% from the NaH/DMF or MeCN reactions when only 2.2 equiv of the electrophile are used.
25,26-Dialkoxycalix[4]arenes. Part 2: 1-Alkoxy-3-benzoyloxy route
Kuo, Cheng-Han,Huang, Jun-Ren,Chen, Hui-Ru,Chen, Pei-Yu,Lin, Chien-Hung,Lin, Lee-Gin
experimental part, p. 3936 - 3944 (2011/06/23)
Benzoylation of calix[4]arene monoalkyl ethers with benzoyl chloride yielded the corresponding 3-benzoates and/or 2,3-dibenzoates in different reaction conditions. A simple recrystallization process was able to isolate the 3-benzoates in good yield. In th
Calix[4]arenes with one and two N-linked imidazolium units as precursors of N-heterocyclic carbene complexes. Coordination chemistry and use in Suzuki-Miyaura cross-coupling
Brenner, Eric,Matt, Dominique,Henrion, Mickael,Teci, Matthieu,Toupet, Loic
experimental part, p. 9889 - 9898 (2012/01/04)
The calix[4]arene-imidazolium salts 5-(3-butyl-1-imidazolylium)-25,26,27, 28-tetrabenzyloxy-calix[4]arene bromide (cone) (2), and 5,11-bis(3-alkyl-1- imidazolylium)-25,26,27,28-tetrabenzyloxycalix[4]arene diiodide (cone) (R = methyl, 3a; R = n-butyl, 3b)
25,26-Dialkoxycalix[4]arenes. Part 1: 25-Alkoxy-26,27-diacetoxy route
Wu, Fung-Ying,Chang, Kai-Fu,Kuo, Cheng-Han,Chen, Kuan-Chih,Lee, Kuo-Chang,Huang, Chiun-Shiang,Chiang, Yung-Sheng,Lin, Lee-Gin
, p. 3238 - 3247 (2011/05/17)
Acetylation of calix[4]arene 1,3-dialkyl ethers yielded the corresponding monoacetates. The 1H NMR spectral analysis indicated that the products' alkoxy moieties were 'rotation restricted'. Acylation of calix[4]arene monoalkyl ethers with acety
Multifold photocyclization reactions of styrylcalix[4]arenes
Hueggenberg, Wiebke,Seper, Annamaria,Oppel, Iris M.,Dyker, Gerald
scheme or table, p. 6786 - 6797 (2011/03/18)
A photochemical transannular [2+2] cycloaddition reaction is the main reaction pathway for 1,3-substituted styrylcalix[4]arenes, whereas 1,2-distyrylcalix[4]arenes give calix[4]diphenanthrenes. Oxidative cyclization to phenanthrenes and the transannular [2+2] cycloaddition reaction are observed as competing processes during the photolysis of distyryl- and tetrastyryl-substituted calix[4]arenes. Copyright
Selective synthesis and isolation of all possible conformational isomers of proximally para-disubstituted calix[4]arene
Shimizu, Shoichi,Moriyama, Akihiro,Kito, Katsuyuki,Sasaki, Yasuyuki
, p. 2187 - 2194 (2007/10/03)
All six possible conformational isomers of the proximally p-dibrominated calix[4]arene tetraalkyl ether, 1a-f*, were selectively synthesized by appropriate control of stereochemistry during di-O-alkylation reactions of 5,11-dibromocalix[4]arene syn-dialky
