Parkinson disease (PD) is a neurodegenerative disorder characterized by the accumulation of α-synuclein into Lewy bodies. 3-Benzylidine-indolin-2-one represents a class of compounds, which are known to inhibit the accumulation of α-synuclein. In this paper, we report the synthesis of [13C] and [15N] labelled 1-benzyl-(Z)-3-(benzylidene)indolin-2-one from commercially available [13C2]-chloroacetic acid and [15N]-aniline in five steps. The product will be used to study its metabolites in human liver microsomes by liquid chromatography-tandem mass spectrometry.
<sup>13</sup>C-NMR Reactivity Probes for the Environment
作者:Charles E. Castro、Stephen K. O'Shea、Wen Wang、Eleanor W. Bartnicki
DOI:10.1021/es950423e
日期:1996.3.1
Establishing the general reactivity of any segment of the terrestrial environment can be an important means of characterizing it. The sites capacity far transformation may reflect its environmental health, and knowing this capacity can provide a basis for estimating the rates and nature of the transformations that may occur there. However, no direct means for measuring this reactivity has been available. This work expands upon preliminary efforts to develop reactivity probes for the environment. The C-13- labeled compounds chloroacetic acid (CA), chloroacetamide (CAM), and chloroacetonitrile (CCN) have been synthesized and tested as site reactivity probes (SRPs). The reactivity of activated sludge, a dump site soil, coastal marine water and sediments, and lake water and sediments was assessed by the probes. A simple protocol for employing the SRPs entails incubation with a 2-mL slurry, centrifugation/filtration at a desired time, followed by direct NMR analysis of products. The results indicate a broad capacity for the transformation of xenobietics in the terrestrial environment, and they underscore the probes' capacity to delineate the nature and approximate rates for these processes. The CA probe is the most sensitive, but CAM and CCN allow an assessment of amide and nitrile hydrolysis by a given site. These probes should help in assessing the effectiveness of bioremediation efforts and also in gauging the effects of other alterations to a site.
Metabolic Study of Stable Isotope Labeled Indolinone Derivative in Hepatocyte Cell by UPLC/Q TOF MS