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AssigneeFillger S.A.
InventorsRoger Lamartine, Isabelle Dumazet, Philippe Choquard, Arnold Marcillac, Francis Vocanson, Christian Duchamp
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A new two-step process for the preparation and industrial manufacture of calixarenes is disclosed. In the first step, linear phenolic oligomers are prepared in a basic medium from an optionally substituted phenol and a formaldehyde source. The reaction mixture is then neutralized or acidified, and cyclization of the oligomers is brought about at higher temperatures in the same reaction medium which is made water free and optionally completed by higher boiling liquids. The process allows a definite control of the cyclic compounds to be synthesized. Furthermore, novel calixarene compounds are disclosed as well as an installation for carrying out the process on a laboratory or industrial scale.
A process for the preparation of cyclic phenolic oligomers starting from a phenol at least substituted in the para position and unsubstituted in both ortho positions and a formaldehyde source, comprising the synthesis of at least one linear phenolic oligomer in a basic reaction medium in a first step, and the cyclization of these linear phenolic oligomers in a substantially water-free, neutral or acidic medium in a second step, and wherein the linear oligomers obtained in the first step are not isolated.
Calixarene, wherein the phenolic units are substituted or not, containing more than eight phenolic units in its molecule, the number of these units being even or odd.
para-Isopropylcalix[n]arenes wherein n is an integer of at least 4, and their mixtures.
p-Isopropyldihomooxacalix[4]arene.
Calix[n]arene, wherein the phenolic units are different and n is an integer of at least 5.
Dependencies are inferred from the claim text.