Calixarene derivatives and process for the preparation thereof
US5231196A · kind A · utility
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3Claims
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Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/92
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improvement in the process for preparing a calixarene derivative in which the rotation of its benzene units are hindered and which comprises replacing all or a part of the hydrogen atoms of the hydroxyl groups of a calixarene derivative represented by the general formula: ##STR1## and is characterized by conducting the reaction in the presence of an alkaline earth metal. According to the present invention, an asymmetric calixarene derivative having a "cone" conformation can be selectively prepared by virtue of the template effect of the metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.