The azaquinone-methide elimination: comparison study of 1,6- and 1,4-eliminations under physiological conditions
作者:Rotem Erez、Doron Shabat
DOI:10.1039/b808198k
日期:——
spacer-technique to develop dendritic and polymeric self-immolative molecular systems that can disassemble through a domino-like mechanism upon a stimulusevent. In this report, we study the disassembly of a system that can disintegrate through para- and ortho-azaquinone-methide eliminations. The disassembly was evaluated with molecules that undergo single 1,6- or 1,4-elimination and with molecules that
Dendritic chain reaction: Responsive release of hydrogen peroxide upon generation and enzymatic oxidation of methanol
作者:Michal Avital-Shmilovici、Doron Shabat
DOI:10.1016/j.bmc.2010.02.038
日期:2010.6.1
Signal amplification dramatically increases the sensitivity of diagnostic methods. Recently, we introduced a new technique for signal amplification that uses a distinctive dendritic chain reaction (DCR) to generate exponential evolution of a diagnostic signal. In this report, we demonstrate how the modular design of our DCR probe can be used to improve the detection sensitivity. We synthesized a new probe based on a methyl carbonate linkage, which has superior stability in aqueous media. Triggered release of methanol, which was oxidized by alcohol oxidase present in the solution, produced hydrogen peroxide that used as a reagent in the DCR amplification technique. The new probe exhibited higher sensitivity in detection of hydrogen peroxide than our previously reported probe. (C) 2010 Elsevier Ltd. All rights reserved.