Fluorescent internal charge transfer (ICT) saccharide sensor
摘要:
An efficient internal charge transfer (ICT) fluorescent saccharide sensor 3 has been prepared from 2-formyl benzeneboronic acid and aniline. When saccharides interact with sensor 3 in aqueous solution at pH 8.21 the emission maxima at 404 nm shifts to 362 nm. (C) 2001 Elsevier Science Ltd. All rights reserved.
The present invention describes 2-methyl-quinazoline compounds of general formula (I), methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds, and the use of said compounds for manufacturing pharmaceutical compositions. The 2-methyl substituted quinazoline compounds of general formula(I) effectively and selectively inhibit the Ras-Sos interaction without significantly targeting the EGFR receptor. They are therefore useful for the treatment or prophylaxis of diseases, in particular of hyperproliferative disorders, such as cancer as a sole agent or in combination with other active ingredients.
Binary and ternary phenylboronic acid complexes with saccharides and Lewis bases
作者:L.I. Bosch、T.M. Fyles、T.D. James
DOI:10.1016/j.tet.2004.08.046
日期:2004.11
Cumulative formation constants for the association of three boronic acids (phenylboronic acid and its ortho-anilinomethyl and ortho-benzylaminomethyl derivatives) with four saccharides (fructose, glucose, mannitol, and sorbitol) were determined by potentiometric titration. Similarly, the constants for the formation binary complexes of the three boronic acids with (hydrogen) phosphate, (hydrogen) citrate
The first fluorescent sensing system for dihydrouricline detection is presented. Dihydrouridine is the single most frequently occurring post-transcriptional modification in tRNA from bacteria and eukaryotes. A series of 10 boronic acid derivatives was prepared and their fluorogenic behaviours towards dihydrouridine and uridine were investigated. Whereas uridine always quenches fluorescence via pi-pi stacking interactions, several boronic acid sensors have been found to show substantial fluorescence enhancement upon binding with dihydrouridine. (c) 2006 Elsevier Ltd. All rights reserved.
The B–N bond controls the balance between locally excited (LE) and twisted internal charge transfer (TICT) states observed for aniline based fluorescent saccharide sensors
作者:Laurence I. Bosch、Mary F. Mahon、Tony D. James
DOI:10.1016/j.tetlet.2004.01.112
日期:2004.3
Three boronic acid based saccharide sensors with an aniline fluorophore have been prepared. One of the systems (1a) contains an intramolecular boron-nitrogen (B-N) bond and displays fluorescence due to both LE and TICT states. The other two systems (1b and c) have no B-N bond and only Show fluorescence due to the LE state. (C) 2004 Elsevier Ltd. All rights reserved.