Browsing by Author "Chiang, Pei-Chen"

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Capping the upper and lower rims of calix[4]arenes by aryl dinitrile oxide reactions
(2006-11-20)
Shiao, Ya-Jiun
;
Chiang, Pei-Chen
;
Senthilvelan, Annamalai
;
Tsai, Ming-Tsung
;
Lee, Gene-Hsiang
1, 3-Dipolar cycloadditions of upper- and lower-rim diallylcalix[4]arenes (1 and 3) with aryl dinitrile oxides provide a unique and efficient way of capping the calix[4]arenes. When dinitrile oxides reacted with 5-allylcalix[4]arene 7, they underwent a 1,3-dipolar cycloaddition on one side and an electrophilic substitution on the other side, which led to a novel type of asymmetric calix[4]arenes (9 and 12). (c) 2006 Elsevier Ltd. All rights reserved.