Labelling of Carbaboranyl Compounds with a Selenium Atom with a View to Applications in Boron-Neutron-Capture Therapy (BNCT) and Positron-Emission Tomography (PET)
摘要:
We synthesized 2'-carbaboranyl-2,5'-bi-1H-benzimidazoles containing 10 B-atoms and labeled with Se or the positron-emitting radionuclide Se-73 (t(1/2) = 7.1 h), with a view to their application to cancel. treatment by boron-neutron-capture therapy (BNCT) and to compound-distribution measurements in vivo by positron-emission tomography (PET). Thus, 2,2'-{[2'-(4-[1,2-dicarba-closo-dodecaboran(12)-2-ylmethoxy]phenyl]-[2,5'-bi-1H-benzimidazol]-5-yl}imino)bis[ethanol] (26c) was obtained by the reaction of 2,2'-[(3,4-diaminephenyl)imino]bis[ethanol] (19) with ethyl 2-{4-[1,2-dicarba-closo-dodecaboran(12)-2-ylmethoxy]phenyl}-1H-benzimidazole-5-carboximidate hydrochloride (25), as well as the analogues 26a and 26b (Scheme 6). Tosylation of compound 26c gave 4 regioisomers 27a-d, which, after selenation, produced 2'-{4-[1,2-dicarba-closo-dodecaboran(12)-2-ylmethoxy]phenyl}-5-(tetrahydro-2H-1,4-selenazin-4-yl)-2,5'-bi-1H-benzimidazole (29) in 42% yield (Scheme 7).
Unusual reaction of 1,4-diamino-2-nitrobenzene derivatives toward nucleophiles: Catalysis by sodium sulphite
摘要:
Unusual substitution of amino group occurs by reactions of some 1,4-diamino-2-nitrobenzenes (semipermanent hair dyes) and nucleophiles (NH3, H2O). The reaction is catalyzed by sodium sulfite. The obtained products are suspected of being toxic substances which may he present in cosmetic matrices. Apparently, this reaction is a nucleophilic aromatic substitution hut it may be explained by a mechanism involving a tautomeric form of substrate. (C) 1998 Elsevier Science Ltd. All rights reserved.
Dyes, compositions comprising dyes and methods for using the same are provided.
染料、包含染料的组合物以及使用这些染料的方法。
Novel p-aminophenol derivatives and the use thereof
申请人:——
公开号:US20010004779A1
公开(公告)日:2001-06-28
The present invention relates to new p-aminophenol derivatives and to methods of using the same for coloring keratin fibers. The present invention also relates to colorant compositions containing these compounds.
Polycationic monochromophoric hydrazone compounds, dye compositions comprising such polycationic compounds and dyeing process using them
申请人:David Herve
公开号:US20080263785A1
公开(公告)日:2008-10-30
The present disclosure relates to polycationic monochromophoric hydrazone compounds of following formula (I):
wherein W
1
is a heteroaromatic radical comprising 5 or 6 ring members, optionally condensed with an aromatic ring comprising 6 ring members, comprising a quaternized nitrogen atom and optionally another heteroatom which may or may not be identical to nitrogen; X, which may or may not be identical, is a nitrogen atom or a CR
2
group; Z is a cationic group comprising at least one quaternized nitrogen atom.
The present disclosure also relates to a composition for dyeing human keratin fibers comprising the polycationic compounds disclosed herein, and to a dyeing process using the composition of the present disclosure, and even further to multicompartment device.
Dicationic bis-hydrazone compound, dye composition comprising at least one such compound, implementation process therefor and uses thereof
申请人:David Herve
公开号:US20060096043A1
公开(公告)日:2006-05-11
The present disclosure relates to a novel family of dicationic bis-hydrazone compounds that may be used as direct dyes, and to a dye composition for dyeing keratin fibers, for example, human keratin fibers such as the hair, comprising, in a suitable dyeing medium, at least one such compound. Also disclosed are dyeing processes implementing this composition and uses thereof.
Dyeing composition comprising at least one disulphide dye and method of dyeing human keratin fibers using this dye
申请人:Daubresse Nicolas
公开号:US20060080791A1
公开(公告)日:2006-04-20
Disclosed herein is a dyeing composition comprising a particular disulphide dye and a method of dyeing human keratin fibers, such as hair, using this composition. This composition makes it possible to obtain particularly fast chromatic colorations.