Calixarenes and their use for sequestration of metals
US6297395A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Dec 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are "acid-amide" calixarenes of formula (I) wherein: L is [--CH.sub.2 --] or [--O--CH.sub.2 --O--] and may be the same or different between each aryl group; R.sub.5 is H, halogen, or C.sub.1- C.sub.10 aliphatic hydrocarbyl group, C.sub.6- C.sub.20 aryl group, C.sub.6- C.sub.10 hydrocarbyaryl group, any of which may optionally be substituted by one or more halo or oxo groups or interrupted by one or more oxo groups, and R.sup.5 may be the same or different on each aryl group; R.sup.1 comprises an optionally protected carboxy group; two groups out of R.sup.2, R.sup.3, and R.sup.4 are H; the one group out of R.sup.2, R.sup.3, and R.sup.4 not being H comprises an amide group. The amide group may be linked to a second calixarene to form a dimer. Also disclosed are methods of use of such calixarenes for the purposes of metal sequestration, especially of lanthanides and actinides. Also disclosed are calixarene dimer derivatives of the calixarenes of the invention. Also disclosed are processes for preparing the calixarenes and dimers. ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.