Two stereoisomers of C-unalkylated calix[4]resorcinarene and the conformation change

SummaryC-unalkylated calix[4]resorcinarene octamethyl ether was prepared by the HCl-catalyzed condensation of 1,3-dimethoxybenzene with paraformaldehyde in 2-ethoxyethanol. The conformation of the C-unalkylated calix[4]resorcinarene was preferentially chair-like when the large amount of conc.HCl was...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2002-07, Vol.48 (6), p.423-429
Main Authors: DAIXIN LI, SUZUKI, Toshie, KONISHI, Gen-Ichi, YAMAGISHI, Tada-Aki, NAKAMOTO, Yoshiaki
Format: Article
Language:English
Subjects:
Aliphatic compounds
Chemistry
Exact sciences and technology
Organic chemistry
Preparations and properties
Stereoisomerism
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Summary:SummaryC-unalkylated calix[4]resorcinarene octamethyl ether was prepared by the HCl-catalyzed condensation of 1,3-dimethoxybenzene with paraformaldehyde in 2-ethoxyethanol. The conformation of the C-unalkylated calix[4]resorcinarene was preferentially chair-like when the large amount of conc.HCl was used. The conformation changed from a chair-like to a boat-like isomer by heating in the temperature range from 240 to 250 °C in bulk.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-002-0058-3