- FLUORESCENCE COMPOUNDS AND PREPARATION METHOD THEREOF
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Provided is a fluorescent compound represented by the following [Chemical Formula 1] and a method for preparing the same: wherein each of X, Y, R1, R2, R3 and n is the same as defined in the specification.
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Paragraph 0288; 0289; 0290; 0291; 0292; 0293
(2017/11/16)
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- Cyanine compound for labeling biomolecule and preparation method thereof
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Disclosed are a novel cyanine compound, represented by the following Formula 1, for labeling biomolecules, and a method for preparing the same. wherein R1, R2, R3, R4, B, m and n are defined as above.
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- Synthesis of PEG derivatives bearing aminophenyl and their application for liquid-phase synthesis of water-soluble unsymmetrical cyanine dyes
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The synthesis and NMR characterization of soluble PEG-supported polymers were described, and their subsequent application for liquid-phase synthesis of water-soluble cyanine dyes was also studied. Nucleophilic substitution of tosylation of PEG 16 with 1,3-bis(4-nitrophenoxy)-2-propanol 15 under basic conditions, followed by nitro group reduction, gave PEG-bound aminophenyl 18. Another PEG-bound aminophenyl 28 was prepared by condensation reaction of PEG-bound pentaerythritol 25 and 4-aminobenzoic acid followed by the cleavage of BOC group. Subsequent loading and activation of sulfoindoleninium to PEG derivatives 18 or 28 were achieved via simple strategies. Cyanine dyes were released by the attack of heterocyclic carbon nucleophile and the cleavage of PEG-bound hemicyanine without the chromatographic separation. The efficient, facile, and practical approaches appear to be robust and versatile strategies to deliver not only indocyanine dyes but also benzoindocyanine dyes.
- Jiang, Lin-Ling,Li, Bao-Lin,Lv, Feng-Ting,Dou, Li-Fang,Wang, Liu-Chang
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experimental part
p. 5257 - 5264
(2009/12/01)
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- An efficient approach to the synthesis of water-soluble cyanine dyes using poly(ethylene glycol) as a soluble support
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An efficient synthesis approach to unsymmetrical water-soluble cyanine dyes has been established. Loading and activation of sulfoindolenium to poly(ethylene glycol) (PEG) have been achieved via a simple strategy. Cyanine dyes are released by the attack of heterocyclic carbon nucleophile and the cleavage of PEG-bound hemicyanine. The efficient approach delivers cyanine dyes in high purity without the nontrivial chromatographic separation.
- Jiang, Lin-Ling,Dou, Li-Fang,Li, Bao-Lin
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p. 5825 - 5829
(2008/02/09)
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- PH sensitive cyanine dyes as reactive fluorescent reagents
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The present invention provides pH sensitive cyanine dyes having the structure (I) wherein X and Y are independently selected from >C(C1 - C4alkyl)2, sulfur and oxygen; R1 and R2 are independently selected from H, CH2NH2, SO3-, phosphate, phosphonate, quaternary ammonium, (CH2)qCOOH, NCS, CH2NH-COR7, where R7 is C1 - C20 straight or branched alkyl and (CH2)qCOOH where q is an integer from 0 - 10; R3 is H or -L-P where L is selected from C1 - C20 straight or branched alkyl optionally containing 0, 1 or 2 unsaturated groups selected from alkenyl and alkynyl, and P is selected from a reactive group, H, C1 - C20 straight or branched alkyl, SO3-, NH2, quaternary ammonium, CH2NH-COR8, where R8 is C1 - C20 straight or branched alkyl, -(CH2)mCOOH, NHR9 where R9 is C1 - C20 straight or branched alkyl; n is an integer from 0 - 3; p and r are independently 0, 1, 2, 3 or 4 and where p and/or r is greater than 1, each R1 and each R2 may be different, and m is an integer from 1 - 10; and salts and protonated derivatives thereof and methods of using same as fluorescent reagents.
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