Rare earth cryptates, processes for their preparation, synthesis intermediates and application as fluorescent tracers
July 26, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3888877 Monocyclic macrocyclic compounds and complexes thereof Method and apparatus for improved analytical fluorescent spectroscopy Complexes of macrocyclic compounds Fluorescent scavenger particle immunoassay Fluorescent labels comprising rare earth chelates Fluorescence spectroscopy assay means with fluorescent chelate of a lanthanide Reversible, electrochemically-switched lariat ethers Adjustable strap fastener Substituted pyridine derivatives InventorsAssigneeApplicationNo. 737556 filed on 07/26/1991US Classes:534/15, RARE EARTH METAL CONTAINING (At. No. 21, 39, 57-60 or 62-71)436/546, Fluorescent label436/800, FLUORESCENT DYES (E.G., RHODAMINE, ETC.)540/465, Heavy metal or aluminum containing540/467, The hetero ring contains chalcogen540/469Plural nitrogens in the hetero ringExaminersPrimary: Stoll, Robert L.Assistant: Covert, John M. Attorney, Agent or FirmForeign Patent References
International ClassesC07D 401/04C07D 471/00 C07D 498/00 G01N 033/533 Foreign Application Priority Data1987-12-18 FRAbstractThe invention relates to rare earth cryptates consisting of at least one rare earth salt complexed by a macropolycyclic compound corresponding to one of formulae I or II below, in which:the ring ##STR1## is the N2 O4 macrocycle, the N2 O3 macrocycle or a bis-bipyridine macrocycle;Y is a spacer arm or group which consists of a divalent organic radical selected from linear or branched C1 to C20 alkylene groups optionally containing one or more double bonds and/or optionally being interrupted by one or more heteroatoms such as oxygen, nitrogen, sulfur or phosphorus, or from C5 to C8 cycloalkylene groups or C6 to C14 arylene groups, the said alkylene or arylene groups optionally being substituted by alkyl, aryl or sulfonate groups;Z is a functional group capable of bonding covalently with a biological substance;R is a methyl group or represents the group --Y--Z ##STR2##Other References
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