Synthetic Amebicides. III. 7-(3-Octylaminopropylamino)-benz[c]acridine (PAA-2056) and Related 7-(Alkyl- and Aralkylaminoalkylamino)-benz[c]acridines1,2
Identification of 4-Hydroxyheptachlorostyrene in Polar Bear Plasma and Its Binding Affinity to Transthyretin: A Metabolite of Octachlorostyrene?
摘要:
A new compound, 4-hydroxyheptachlorostyrene (4-OH-HpCS), was identified as a major component in the chlorinated phenolic compound fraction of polar bear plasma. The structure was hypothesized to be 4-OH-HpCS based on mass spectral interpretation, the assumption that it was a metabolite of octachlorostyrene, and the similarity of the structure to hydroxylated polychlorinated biphenyls (OH-PCBs) identified in plasma. High-resolution, electron impact (EI) ionization mass spectrometry of the methylated compound indicated a molecular formula of C9H3OCl7 and major fragment ions of [M - 15](+), [M - 35](+), and [M - 43](+), which was a mass spectral pattern identical to a synthesized and methylated 4-OH-HpCS standard. The identity was further confirmed by matching gas chromatography (GC) retention times on three different GC columns of differing polarity. Levels of 4-OH-HpCS ranged from 2.89 to 22.9 ng/g wet weight in polar bear plasma (N=30) and constituted between 3.8 and 24.8% of the total quantified level of chlorinated phenolic compounds. The mean ratio of 4-OH-HpCS to CB153 concentrations in polar bear plasma samples was 0.712 (+/- 0.580 SD), which suggests selective retention of the 4-OH-HpCS in plasma. The presumed mechanism of retention involves 4-OH-HpCS binding to transthyretin (TTR). The presence of TTR was confirmed for the first time in polar bear plasma by binding of I-125-thyroxine (T-4), the natural ligand of TTR, to separated plasma proteins. The binding affinity of 4-OH-HpCS to human TTR was tested and found to be 1.1 relative to T-4. This suggests that 4-OH-HpCS has the potential to disrupt T-4 and retinol transport, by analogy to OH-PCBs with similar structure. Metabolism of octachlorostyrene (OCS) is the most likely source of 4-OH-HpCS. DCS was shown to be present at low concentrations in polar bear tissues as well as in plasma of ringed seal, the principal prey species of polar hears. The ratio of 4-OH-HpCS to OCS and 4-OH-HpCS to CB153 concentrations were 150- and 44-fold higher in polar bear plasma than in ringed seal plasma. This study indicates that the phenolic metabolites of relatively minor contaminants possess the capacity to bind to circulating proteins, and their significance as potential endocrine-disrupting agents may be underestimated.
The present invention relates in a first consideration to aldimines of formula (I). Said aldimines are particularly suitable as latent hardeners in curable compositions, particularly compositions comprising one or two-component isocyanate groups. Due to the presence of the reactive group, they can be converted to compounds of the formulas (X) and (XII) comprising aldimine groups, implementing a further consideration of the present invention. The aldimines, or the compounds comprising aldimine groups, can be used primarily in adhesive and sealant materials, but also in coatings, and can be produced easily from readily available source materials, and have good thermal stability. The tertiary amino group thereof has a surprisingly low alkalinity and can in some cases have a catalytic effect in chemical reaction systems.
Aldimines of Formula (I), which can be used as latent curing agents in curing compositions, for example, in moisture-curing polyurethane compositions that have isocyanate groups. The aldimines are compounds that can be liquid at room temperature, can have a hardly noticeable aldehyde odor before, during and after hydrolysis, and can have a long shelf life. An aldehyde in polyurethane compositions that is released during hydrolysis has only a slight softening effect and can exhibit very little tendency to migrate or exude.
POLYAMINES HAVING SECONDARY ALIPHATIC AMINO GROUPS
申请人:Butikofer Pierre-Andre
公开号:US20130261270A1
公开(公告)日:2013-10-03
The present invention relates to novel polyamines having secondary amino groups, a process for producing them, adducts of these polyamines and their uses. The polyamines can be prepared in a simple way from readily available reactants. They and their adducts have, in particular, a low viscosity and are suitable as constituent of polyurethane and polyurea compositions having excellent processability and high flexibility, and also constituent of epoxy resin compositions, especially coatings.
Härtbare Kunstharzmischungen und Mittel für härtbare Kunstharzmischungen auf Basis von präpolymeren Polyätherurethanharnstoffaminen und Epoxidharzen
申请人:SCHERING AKTIENGESELLSCHAFT
公开号:EP0084106A1
公开(公告)日:1983-07-27
Gegenstand der vorliegenden Erfindung sind härtbare Kunstharzmischungen, bestehend aus einem Polyätherurethanharnstoffamin mit zwei oder mehr reaktiven Aminwasserstoffen pro Molekül, hergestellt durch Umsetzung von di-oder polyfunktionellen Carbamidsäurearylestern mit mindestens einer di- und/oder polyfunktionellen Aminverbindung, welche mindestens zwei reaktive Aminwasserstoffe pro Molekül enthält oder weiche mindestens einen reaktiven Aminwasserstoff und mindestens eine Azomethingruppe pro Molekül enthält, wobei aus den Azomethingruppen enthaltenden Verbindungen durch anschließende Hydrolyse das Amin freigesetzt wird, und Glycidylverbindungen mit im Durchschnitt mehr als einer Epoxidgruppe pro Molekül und gegebenenfalls üblichen Füllstoffen, Pigmenten, Reaktionsbeschleunigern, Viskositätsregulatoren und Additiven.
Polyamidelastomere, ihre Herstellung und ihre Verwendung
申请人:BAYER AG
公开号:EP0423577A1
公开(公告)日:1991-04-24
Die Erfindung betrifft amorphe Polyamide mit Elastomercharakter auf Basis von Dimerfettsäuren und speziellen prim./sek.-Diaminen und/oder speziellen disekundären Diaminen mit einer Glastemperatur von weniger als + 10°C, die Herstellung dieser amorphen Polyamide und ihre Verwendung als Kautschuk, Weichmacher bzw. Schlagzähmodifikatoren für Thermoplaste, als Weichsegmente zum Aufbau thermoplastischer Elastomerer und für andere Zwecke.