Solvent effects on the structure-property relationship of anticonvulsant hydantoin derivatives: A solvatochromic analysis [PDF]
Considering the pharmaceutical importance of hydantoins, a set of 25 derivatives of phenytoin, nirvanol and 5-methyl-5-phenylhydantoin, the lipophilicities of which were gradually increased by the introduction of different alkyl, cycloalkyl and alkenyl ...
Gordana Ušćumlić +2 more
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Investigation of the reactivity of 4-pyrimidinecarboxylic, 6-hydroxy-4-pyrimidinecarboxylic and 5-hydroxyorotic acids with diazodiphenylmethane in various alcohols. Part III [PDF]
Rate constants for the reaction of diazodiphenylmethane (DDM) with 4-pyrimidinecarboxylic, 6-hydroxy-4-pyrimidinecarboxylic and 5-hydroxyorotic acids were determined in twelve protic solvents at 30 °C using the well known UV-spectrophotometric method ...
FATHI H. ASSALEH +3 more
doaj +3 more sources
Push and pull: the potential role of boron in N2 activation [PDF]
Recent developments in main group chemistry towards the activation and conversion of N2 have lead to the revelation that boron can greatly affect these processes.
Melen, Rebecca L. +3 more
core +2 more sources
Diarylmethyl Ethers for the Protection of Polyols
The paper discusses the use of diarylmethyl ethers for the protection of hydroxyl groups, in particular, carbohydrate hydroxyl groups. The formation of these ethers can be done nonselectively by the thermal reactions of diryldiazomethanes via a carbene mechanism or by tin(II) halide catalysis of the diazo compounds with diols.
Sigthor Petursson, Christophe Len
wiley +1 more source
Alkaline hydrolysis rates coefficients for the series of methyl 3-(7-substituted-1-naphthyl) propynoate was calculated in 70%v/v dimethylsulphoxide-water at various temperatures (25,30,40, and 50̊ C).
Khalaf D. F. Ghadir +3 more
doaj +1 more source
Effect of Temperature and Solvent on the 1,3-Dipolar Cycloaddition of Diazodiphenylmethane with Several Dipolarophiles [PDF]
Abstract The title reaction is studied with a series of CN- or COOCH3-substituted dipolarophiles. All the reactions obey the second-order rate law. The activation enthalpies and entropies are 44–52 kJ mol−1 and −(129–166) J K−1 mol−1, respectively. The rate constants are insensitive to solvent.
Yosuke Yoshimura +2 more
openaire +1 more source
The study of the reactivity of carboxylic acids by the method of linear solvation energy correlations [PDF]
U cilju proučavanja uticaja rastvarača na reaktivnost organskih molekula odabrana je kao model reakcija karbo ksi lnih kiselina sa diazodifenilmetanom (DDM).
Nikolić, Jasmina
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Studies of novel antibacterial agents and antibiotic resistance breakers towards combating multidrug resistant bacteria [PDF]
β-Lactam containing compounds are the most important antibacterials. Following the discovery of the penicillins, successive generations of β-lactams (penicillins, cephalosporins, monobactams, carbapenems) have saved countless lives.
Wang, Yuxin
core +2 more sources
Bis(silylene)‐Mediated N═N Bond Scission of Diazo Compounds
The carborane‐based bis(silylene) enables unprecedented N═N bond scission in diazodiarylmethanes. While xanthene‐ and aniline‐based scaffolds promote end‐on addition with partial N═N activation, the carborane‐based variant uniquely achieves complete N═N bond scission of Ar2C═N═N compounds, resulting in isolable disilicon nitride imino species.
Yun Xiong, Shenglai Yao, Matthias Driess
wiley +1 more source
Systematic methods for solvent design : towards better reactive processes [PDF]
The focus of this thesis is the development of novel methodologies for systematic identification of optimal solvents for chemical reactions. Two aspects are considered: the integrated solvent and process design using a mixed solvent, and the design of an
Siougkrou, Eirini
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