Fluorogenic Azidofluoresceins for Biological Imaging
摘要:
Fluorogenic probes activated by bioorthogonal chemical reactions can enable biomolecule imaging in situations where it is not possible to wash away unbound probe. One challenge for the development of such probes is the a priori identification of structures that will undergo a dramatic fluorescence enhancement by virtue of the chemical transformation. With the aid of density functional theory calculations reported previously by Nagano and co-workers, we identified azidofluorescein derivatives that were predicted to undergo an increase in fluorescence quantum yield upon Cu-catalyzed or Cu-free cycloaddition with linear or cyclic alkynes, respectively. Four derivatives were experimentally verified in model reactions, and one, a 4-azidonaphthylfluorescein analogue, was further shown to label alkyne-functionalized proteins in vitro and glycoproteins on cells with excellent selectivity. The azidofluorescein derivative also enabled cell imaging under no-wash conditions with good signal above background. This work establishes a platform for the rational design of fluorogenic azide probes with spectral properties tailored for biological imaging.
[EN] MACROCYCLIC COMPOUNDS AS ALK, FAK AND JAK2 INHIBITORS<br/>[FR] COMPOSÉS MACROCYLCIQUES COMME INHIBITEURS D'ALK, DE FAK ET DE JAK2
申请人:CEPHALON INC
公开号:WO2012125603A1
公开(公告)日:2012-09-20
The present invention provides compounds of Formula I or a pharmaceutically acceptable salt forms thereof, wherein R1, R2, R3, R4, R5, A and X are as defined herein, methods of treatment and uses thereof.
BIPHENYLCARBOXAMIDE DERIVATIVES AS HEDGEHOD PATHWAY MODULATORS
申请人:Dierks Christine
公开号:US20100197659A1
公开(公告)日:2010-08-05
The invention provides a method for modulating the activity of the hedgehog signaling pathway. In particular, the invention provides a method for inhibiting aberrant growth states resulting from phenotypes such as Ptc loss-of-function, hedgehog gain-of-function, smoothened gain-of-function or Gli gain-of-function, comprising contacting a cell with a sufficient amount of a compound of Formula I.
COMPOUNDS AND COMPOSITIONS AS HEDGEHOG PATHWAY MODULATORS
申请人:Gao Wenqi
公开号:US20090203666A1
公开(公告)日:2009-08-13
The invention provides a method for modulating the activity of the hedgehog signaling pathway. In particular, the invention provides a method for inhibiting aberrant growth states resulting from phenotypes such as Ptc loss-of-function, hedgehog gain-of-function, smoothened gain-of-function or Gli gain-of-function, comprising contacting a cell with a sufficient amount of a compound of Formula I.
ALKYNE-ACTIVATED FLUOROGENIC AZIDE COMPOUNDS AND METHODS OF USE THEREOF
申请人:The Regents of the University of California
公开号:US20150276752A1
公开(公告)日:2015-10-01
The present disclosure provides fluorogenic azide compounds. Also provided are methods of using the subject compounds for labelling a target biomolecule that includes an alkyne. In some embodiments, the method includes contacting the biomolecule with a fluorogenic azide compound, wherein the contacting results in covalent linkage of the compound with the alkyne moiety of the target biomolecule.
Compounds of formula (I), and salts and pro-drugs thereof: Formula (I) wherein for example R
1
is optionally substituted aryl or heteroaryl; Y is a linking group selected from, for example, a direct bond, and a (substituted) alkyl chain; R
2
is an optionally substituted aryl, an optionally substituted cycloalkyl or an optionally substituted heterocyclic group; are described. Processes to make such compounds and their use as DGAT inhibitors, for example in the treatment of obesity, are also described.