A simple and efficient microwave-assisted synthesis of asymmetric pentamethine cyanine dyes with various functional groups was developed, which allows high-yielding results. The synthesized dyes are modifiable and suitable for single-molecule imaging in biological and medical sciences by application of click chemistry or classic esterification and amidation.
Analogues of Neuroactive Polyamine Wasp Toxins That Lack Inner Basic Sites Exhibit Enhanced Antagonism Toward a Muscle-Type Mammalian Nicotinic Acetylcholine Receptor
作者:Kristian Strømgaard、Matthew J. Brierley、Kim Andersen、Frank A. Sløk、Ian R. Mellor、Peter N. R. Usherwood、Povl Krogsgaard-Larsen、Jerzy W. Jaroszewski
DOI:10.1021/jm9903747
日期:1999.12.1
resulting PhTX-343 analogues were purified and characterized, and their protolyticproperties (stepwise macroscopic pK(a) values) were determined by (13)C NMR titrations. All analogues are fully protonated at physiological pH. The effects of these compounds on acetylcholine-induced currents in TE671 cells clamped at various holding potentials were determined. All of the analogues noncompetitively antagonized
Disclosed are novel stable violet-blue to blue imidazolium azo compounds that have a simplified chromophore and high relative solubility in aqueous systems, and that are stable under the conditions of use and storage. The compounds are useful for dyeing fibers such as fabrics and hair, as fabric hueing agents, and as dyes for other keratinaceous materials. Also disclosed are laundry care compositions comprising the imidazolium azo compounds and methods of using the compositions.
[EN] HAIR COLOR COMPOSITIONS COMPRISING STABLE VIOLET-BLUE TO BLUE IMIDAZOLIUM DYES<br/>[FR] COMPOSITIONS DE COLORATION DES CHEVEUX COMPRENANT DES COLORANTS D'IMIDAZOLIUM STABLES VIOLET-BLEU AU BLEU
申请人:NOXELL CORP
公开号:WO2018053034A1
公开(公告)日:2018-03-22
Disclosed are hair color compositions comprising novel stable violet-blue to blue imidazolium azo compounds that have a simplified chromophore and high relative solubility in aqueous systems, and that are surprisingly stable under the conditions of use and storage. These compositions are useful for dyeing fibers such as hair and other keratinaceous materials. The compositions can optionally include an oxidant. Also disclosed are methods for dying keratin fibers including human hair using the disclosed hair color compositions. The methods optionally include an ability to alter the electronic charge in situ of the hair color compositions
fluorescent probes for the histamine H3 receptor (H3R) and especially for the H4R orthologs [e.g., human (h) and mouse (m)] are highly needed as versatile complementary tools to radioligands. In view of fluorescent probes for BRET-based binding studies and for localizing the H4R in live cells, we synthesized and biologically characterized Py-5-labeled histaminederivatives. The most notable compound