Ortho-Specific Bromination of Phenols Phenol as well as 3-substituted phenols are brominated exclusively in the orthopositions by N.N-dibromomethylamine, yielding 2.6-dibrominated phenols in excellent yields. Phenols bearing an ortho-substituent need N-bromomethylamine as the brominating agent to take...
ChemInform Abstract: THE ORTHO/PARA RATIO IN THE BROMINATION OF PHENOL, EVIDENCE FOR A COORDINATION EFFECThalogenation, dehalogenationmonovalent phenolsNois available for this article.doi:10.1002/chin.197446178VINCENZO CALOLUIGI LOPEZGIOVANNI PESCEPAOLO EDGARDO TODESCO...
Oxybromination of phenol and aniline derivatives in H2O/scCO2 biphasic media The oxybromination of phenols and anilines was achieved in the benign H2O/scCO2biphasic system using NaBr–H2O2as the bromine source without the need for metal catalysts or acidic additives. The reactivity of the system ...
The influence of bromination at all the ortho-positions of phenols on the features of phenolsulfonphtalein andphenolphtalein was investigated. The absorption spectra ofBromphenol Blue (H2BPS) in phosphate buffers demonstrated thecomplete opening of the lactone ring to form yellow HBPS- at pH 1...
PRODUCTION OF ORTHO BROMOPHENOL COMPOUNDSPURPOSE: To obtain a ortho bromo phenol compound from a phenol compound in which the para position and at least one of the ortho positions to a hydroxy group are not substituted in a high yield by adding an amine compound to the reactional system and ...
Two different synthetic pathways to obtain the ortho-bromo azo intermediates were explored, namely the palladium catalysed selective ortho bromination of azobenzenes and the diazo coupling of ortho-bromo diazonium salts with N,N-dimethylaniline, imidazole, phenol, sodium methanesulfinate and ethyl ...
Production manner null of ortho bromophenolPURPOSE: To obtain a ortho bromo phenol compound from a phenol compound in which the para position and at least one of the ortho positions to a hydroxy group are not substituted in a high yield by adding an amine compound to the reactional system ...
ChemInform Abstract: THE ORTHO/PARA RATIO IN THE BROMINATION OF PHENOL, EVIDENCE FOR A COORDINATION EFFECTdoi:10.1002/chin.197446178VINCENZOCALOLUIGILOPEZGIOVANNIPESCEPAOLOEDGARDOTODESCOWileyChemischer Informationsdienst