One-pot solvent-free synthesis of triaryl- and triheteroarylmethanes by Bi(OTf)3-catalyzed Friedel-Crafts reaction of arenes/heteroarenes with trialkyl orthoformates
A convenient, practical and highly efficientone-pot method has been developed for the synthesis of triaryl- and triheteroarylmethane derivatives by Bi(OTf)3-catalyzed Friedel-Crafts alkylation of trialkyl orthoformates in combination with a wide variety of arenes/heteroarenes at room temperature under solvent-free conditions and in an air atmosphere. The methodology offers an operational simplicity
Orthoamide, LXVII [1]. Bis(diformylamino)methan – ein neues leistungsfähiges Formylierungsmittel für aromatische Verbindungen / Orthoamides, LXVII [1]. Bis(diformylamino)methane – a New Efficient Formylating Reagent for Aromatic Compounds
作者:Willi Kantlehner、Ernst Anders、Jochen Mezger、Edmont V. Stoyanov、Ralf Kreß、Kurt Wermann、Wolfgang Frey、Helmar Görls
DOI:10.1515/znb-2008-0406
日期:2008.4.1
N-(chloromethyl)diformamide (12) in acetonitrile. The action of tris(chloromethyl) amine (18) on sodium diformamide (8) affords tris(diformylaminomethyl)amine (19). The constitution of the compounds 7, 11 and 19 was confirmed by crystal structure determination. The nature of the products from the reactions of aromatic compounds with 12 depends on the Lewis acid which is used as activator. Thus the N-benzylformamides
[EN] TRIANGULENIUM FLUORESCENT DYES AND POLYMERS COMPRISING SUCH DYES<br/>[FR] COLORANTS FLUORESCENTS DE TYPE TRIANGULENE ET POLYMERES COMPORTANT DE TELS COLORANTS
申请人:VERSAMATRIX AS
公开号:WO2005012436A1
公开(公告)日:2005-02-10
The invention relates to fluorescent dyes comprising a triangulene structure in the form of a ring system of six, six-membered rings fused in a triangular fashion. The dyes are useful for visualisation of chemical compounds including polymer matrices for e.g. chromatographic separation and isolation of desirable chemical moieties, and for chemical library synthesis.
This invention pertains generally to processes, uses, methods and materials utilising particular xanthylium compounds, including compounds of formula (I) and (II), as further defined herein. These compounds are useful as drugs, for example, in the treatment of tauopathies, such as Alzheimer's disease.
A sensor for the detection or measurement of a carbohydrate analyte in fluid comprises components of a competitive binding assay the readout of which is a detectable or measurable optical signal retained by a material that permits diffusion of the analyte but not the assay components, the assay components comprising: a carbohydrate binding molecule labelled with one of a proximity based signal generating/modulating moiety pair; and a carbohydrate analogue capable of competing with the analyte for. binding to the carbohydrate binding molecule, the carbohydrate analogue being a flexible water-soluble polymer comprising: polymerized or co-polymerised residues of monomer units, the monomer unit residues bearing pendant carbohydrate or carbohydrate mimetic moieties and pendant moieties which are the other of the proximity based signal generating/modulating moiety pair.