Calix[4 ]arene dibenzo crown ethers, their preparation process a

Details Calix[4 ]arene dibenzo crown ethers, their preparation process a Calix[4 ]arene dibenzo crown ethers, their preparation process a

1998-11-23

2000-03-21

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562471, 562500, 568644, C07D32300, C07C 43205

Patent

active

060404620

ABSTRACT:
Novel calix[4]arene dibenzo crown ethers useful to selectively extract cesium are represented by the formula: wherein R is a C.sub.1 -C.sub.10 normal alkyl, a phenyl or a methoxyphenyl, R' is hydrogen, p-tert-butyl or a C.sub.1 -C.sub.10 normal alkyl, R" is a C.sub.1 -C.sub.10 normal alkyl, and n is an integer of 0-2. The novel compound is prepared at high yields by introduction of benzene rings into the crown ether ring of calix[4]arene crown-6-ether. The calix[4]arene dibenzo crown ethers are superior in selective absorptivity for cesium ions by virtue of their 1,3-alternate conformational structure and thus, can be used as selective extractants able to separate cesium ions at a high efficiency.

REFERENCES:
patent: 4452702 (1984-06-01), Blasius et al.
patent: 5607591 (1997-03-01), Dozol et al.
Kim, et al., Bull. Korean Chem. Soc. (1997), 18(6) pp. 677-680.

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