54845-41-9Relevant academic research and scientific papers
A New Synthesis of Oxacalixarene Macrocycles and Alkali-Metal-Binding Studies
Hampton, Philip D.,Bencze, Zsolt,Tong, Weidong,Daitch, Charles E.
, p. 4838 - 4843 (2007/10/02)
The title oxacalixarene macrocycles 1 have been synthesized in yields of 12-32percent by an acid-catalyzed, high-dilution condensation of 2,6-bis(hydroxymethyl)-p-subtituted-phenols, where R = t-Bu, i-Pr, Et, Me, and Cl.The macrocycles are isolated in high purity without chromatography, as the sodium or potassium salts of their monoanions.Metal-binding studies indicate that, like the related calixarenes, the oxacalixarenes bind alkali metals only in the presence of base (Na(1+) ca.K(1+) > Li(1+)).
SOLID STATE POLYCONDENSATION OF PRECURSORS OF PHENOLIC RESINS
Lamartine, Roger,Perrin, Robert,Vicens, Jacques,Gamet, Daniel,Perrin, Monique,et al.
, p. 219 - 236 (2007/10/02)
Twelve substances derived from phenol or 4-alkylphenol, six of which are precursors of phenolic resins, have been prepared by condensation of the phenol with paraformaldehyde or by further reaction of one of these with the starting phenol.Two cyclic oligomers belonging to the class of calixarenes or cyclophanes have been isolated and characterized.Single crystals of some precursors have been obtained and their crystalline structures have been determined.The thermal decomposition of precursors of phenolic resins has been investigated.Their solid state behaviour and their relative reactivities in acidic and basic conditions have been evaluated.The obtained substances can be considered as important intermediates.They are both sufficiently stable and highly reactive.
