The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2002
Filed:
Jun. 14, 2001
Graeme P. Nicholson, Reading, GB;
Mark J. Kan, Reading, GB;
Gareth Williams, Reading, GB;
Michael G. Drew, Reading, GB;
Paul D. Beer, Oxford, GB;
Abstract
Disclosed are “acid-amide” calixarenes of formula (I) wherein: L is [—CH —] or [—O—CH —O—] and may be the same or different between each aryl group R is H, halogen, or C aliphatic hydrocarbyl group, C aryl 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 may be the same or different on each aryl group; R comprises an optionally protected carboxy group; two groups out of R , R , and R , are H; the one group out of R , R , and R 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