Synthesis of 5- and 6-Carboxy-X-rhodamines
نویسندگان
چکیده
An efficient route is reported to 5- and 6-carboxy-X-rhodamines (compounds 1 and 2) that contain multiple n-propylene or gamma,gamma-dimethylpropylene groups bridging terminal nitrogen atoms and the central xanthene core. Gram quantities of these dyes are synthesized from inexpensive starting materials. The isolated products are activated by selective transformation of the carboxylic acid group into N-hydroxysuccinimidyl esters in situ and then conjugated with an amino group of a molecule of interest.
منابع مشابه
A Rapid and Eco-friendly Synthesis of 5(6)-Carboxy-Rhodamine 110 Isomers
5(6)-Carboxy-rhodamine 110 isomers were rapidly synthesized by condensation of 3-aminophenol and trimellitic anhydride using microwave irradiation as heating method. After esterification of the two isomers, separation and hydrolyzation provided target products,5-carboxy-rhodamine 110 and 6-carboxy-rhodamine 110, in high yields. The results shows microwave irradiation can effectively reduce ...
متن کاملFacile and General Synthesis of Photoactivatable Xanthene Dyes**
Photoactivatable “caged” fluorophores enable numerous advanced biological imaging experiments, including photoactivated localization microscopy (PALM) and related super-resolution imaging techniques. Of the extant fluorophore scaffolds, caged rhodamines and fluoresceins display properties that are exceptionally well suited for superresolution microscopy, exhibiting high contrast and photon yiel...
متن کاملRhodamines NN: a novel class of caged fluorescent dyes.
Caged (that is, masked) fluorescent dyes are maintained in their nonfluorescent state by the incorporation of a photochemical labile group. The photosensitive masking group or “molecular cage” can be cleaved-off by irradiation with nearUV light, thereby rendering the dye fluorescent. Caged fluorescent dyes are of enormous interest for biological imaging because they may be used, for example, fo...
متن کاملNew fluorescent pH sensors based on covalently linkable PET rhodamines
A new class of rhodamines for the application as indicator dyes in fluorescent pH sensors is presented. Their pH-sensitivity derives from photoinduced electron transfer between non-protonated amino groups and the excited chromophore which results in effective fluorescence quenching at increasing pH. The new indicator class carries a pentafluorophenyl group at the 9-position of the xanthene core...
متن کاملSynthesis of Cu-TiO2Nanocomposite and Investigation of the Effectiveness of PEG, Pectin, and CMCas Additives
Recently, TiO2 has been widely used as a photocatalyst for degradation of environmental pollutants. In the present study, the advantage of metal doping onto TiO2 for enhanced photocatalitic activity has been investigated. Copper-Titanium dioxide nanocomposites were prepared by the sol-gel method in the presence of Carboxy Methyl Cellulose (CMC), Pectin, and Poly Ethylene Glycol (PEG) as additiv...
متن کامل