- CARBENE MASS TAGGING
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The disclosure relates to a diazirine precursor mass tag compound represented by structural formula (I). Also disclosed is a method for detecting analytes in a sample, comprising derivatizing the analytes with the compound of formula (I), and detecting th
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- FLUORINATED PHOSPHONIUM IONIC SALTS LINKED TO CARBENE-PRECURSORS
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Fluorinated phosphonium salts are linked to a diazirine moiety. A carbene precursor was photochemically generated from the diazirine to covalently attach the salt to substrates e.g., cotton and paper. Surface-coated substrates were found to have anti-wett
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- Regiochemical substituent switching of spin states in aryl(trifluoromethyl) carbenes
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Although aryl(trifluoromethyl)diazirines have achieved great popularity in photoaffinity labeling applications, the properties of the corresponding carbenes have not been as widely explored. Here, low-temperature matrix-isolation spectroscopy and reactivi
- Song, Myoung-Geun,Sheridan, Robert S.
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supporting information; experimental part
p. 19688 - 19690
(2012/01/14)
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- Diazirine-modified gold nanoparticle: Template for efficient photoinduced interfacial carbene insertion reactions
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Photolysis of a 3-aryl-3-(trifluoromethyl)diazirine-modified monolayer-protected gold nanoparticles (2-C12MPNs), with a core size of 1.8 ± 0.3 nm, in the presence of model carbene trapping reagents leads to efficient, essentially quantitative, modification of the interface via carbene insertion reactions. The utility of carbene insertion reactions as a general approach for the modification of Au-MPNs to provide a breadth of new structures available was demonstrated using acetic acid, methanol, benzyl alcohol, phenol, benzylamine, methyl acrylate, and styrene (10a-g, respectively) as electrophilic carbene trapping agents to form the corresponding modified 3a-g-C12MPNs. The 1.8 ± 0.3 nm gold nanoparticles bearing a diazirine group (2-C12MPNs) were synthesized using the ligand exchange reaction with the requisite 3-aryl-3-(trifluoromethyl) diazirinealkylthiol. The 2-C12MPNs and the resulting products of the reaction on the MPN (3a-g-C12MPN) were fully characterized by IR, 1H NMR, and 19F NMR spectroscopy and, when applicable, transmission electron microscopy (TEM). Verification for the 3a-g-C 12MPNs was accomplished by comparison of the spectral data to those of obtained for the photoreactions of 3-(3-methoxyphenyl)-3-(trifluoromethyl)- 3H-diazirine as a model with 10a-g.
- Ismaili, Hossein,Lee, Soo,Workentin, Mark S.
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p. 14958 - 14964
(2011/10/31)
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- Design and synthesis of a tag-free chemical probe for photoaffinity labeling
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The novel aromatic diazirine-containing benzoic acid 22 was prepared via the diazirine 11 as the key intermediate. After formylation of the aryl ring and cleavage of the methyl ether function of aldehyde 12, the phenolic hydroxy group was converted into the ether 21 terminating in an alkyne function. Oxidation of the aldehyde to the carboxylic acid provided the chemical probe 22 designed for tag-free photoaffinity labeling. In a proof-of-concept study it could be shown that irradiation of the simple ester 23 indeed yields the methanol insertion product 24. A subsequent click reaction with benzyl azide 20 led to the triazole 25. A more complicated example was realized with the esterification of bafilomycin A1 (27) with acid 22. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
- Mayer, Timo,Maier, Martin E.
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p. 4711 - 4720
(2008/03/13)
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- Surface modification of nylon 6,6 using a carbene insertion approach
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The diazirine functionalised fluorenone, 3-[3-(trifluoromethyl)diazirin-3- yl]phenyl-9-oxo-9H-fluorene-2-carboxylate was synthesised to act as a model compound capable of modifying a wide variety of polymeric substrates. Photochemical activation of the diazirine moiety of the fluorenone derivative was utilised to afford highly reactive carbenes capable of insertion into or addition to a wide variety of functionalities. In this paper the photoinduced attachment of a fluorenone derivative to nylon 6,6 has been studied using UV-visible spectroscopic analysis. Incorporation of the fluorenone chromophore onto the backbone of nylon at different loading levels and after different coating cycles has been investigated and is detailed in this paper. the Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2006.
- Blencowe, Anton,Cosstick, Kevin,Hayes, Wayne
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- Aryldiazirine-modified pyroglutamates: Photoaffinity labels for glutamate
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The synthesis of an aryldiazirine-modified pyroglutamate is reported for potential application as a photoaffinity label at glutamate receptors. Detailed 13C NMR and 19F NMR spectroscopic characterisation data for these trifluoromethy
- Bentz, Emilie L.,Gibson, Hannah,Hudson, Clare,Moloney, Mark G.,Seldon, Debbie A.,Wearmouth, Edwina S.
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p. 247 - 250
(2007/10/03)
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- A Novel Family of Aromatic Diazirines for Photoaffinity Labeling
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A series of simple methods for modifying diazirines bearing an aromatic ring has been accomplished.This first versatile approach involving direct substitution on the aromatic ring of diazirines has been achieved by means of the aromatic thallation of (alkoxyphenyl)diazirines.Introduction of the thallium moiety was successfully followed by nitration, iodination, or palladium-catalyzed carbonylation to give a family of substituted aryldiazirines useful for photolabeling.For instance, diazirines labeled with a nitro group can be detected by spectrophotometric methods, and those labeled with an iodo group can be useful in tracer experiments.The (methoxyphenyl)diazirines were also found to be stable under certain demethylation conditions, thus providing a potential source of diazirines with modifiable phenol hydroxyl groups.By means of this approach, a spacer arm to link diazirines with ligands was readily introduced.Radioactive diazirines labeled with carbon-14 or tritium were also prepared using this method.All the new diazirines were derived from a pair of simple (methoxyphenyl)diazirines.The ease of derivatization of the (alkoxyphenyl)diazirines described here may offer a practical approach to simplify the time-consuming methods currently used for diazirine synthesis.
- Hatanaka, Yasumaru,Hashimoto, Makoto,Kurihara, Hiroko,Nakayama, Hitoshi,Kanaoka, Yuichi
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p. 383 - 387
(2007/10/02)
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