Results 11 to 20 of about 112 (84)

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents, Part I: Pyridine mono-carboxylic acids [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
Marinković Aleksandar D.   +3 more
doaj   +1 more source

Substituent and structural effects on the kinetics of the reaction of N-(substituted phenylmethylene)-m- and -p-aminobenzoic acids with diazodiphenylmethane [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
The rate constants for the reaction of twenty-two N-(substituted phenyl methylene)-m- and -p-aminobenzoic acids with diazodiphenylmethane were determined in absolute ethanol at 30 °C.
BRATISLAV Z. JOVANOVIC   +3 more
doaj   +3 more sources

The kinetics of the reaction of 6-substituted nicotinic acids and some p-substituted benzoic acids with diazodiphenylmethane in various alcohols [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
Rate constants have been determined for the reactions of diazodiphenylmethane with a number of 6-substituted nicotinic acids and p-substituted benzoic acids in twelve alcohols. A comparative study was used to evaluate and compare the Hammett r values and
MILICA M. MISIC-VUKOVIC   +2 more
doaj   +2 more sources

A comparative LFER study of the reactivity of pyridineacetic, pyridineacetic acids N-oxide and substituted phenylacetic acids with diazodiphenylmethane in various alcohols [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
Rate constants have been determined for the reactions of diazodiphenylmethane (DDM) with 3- and 4-pyridineacetic acid, 3- and 4-pyridineacetic acid N-oxide and some meta- and para-substituted phenylacetic acids in twelve alcohols.
MILICA M. MISIC-VUKOVIC   +2 more
doaj   +3 more sources

The comparative study of linear solvatation energy relationship for the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2012
Protic and aprotic solvent effects on the reactivity of picolinic, nicotinic and isonicotinic acid, as well as of some substituted nicotinic acids with diazodiphenylmethane (DDM) were investigated.
Drmanić Saša Ž.   +3 more
doaj   +1 more source

Erratum [PDF]

open access: yesJournal of the Serbian Chemical Society, 1999
Reactivity of b-aroylacrylic acids with diazodiphenylmethane Lj. S. STEVOVIĆ 1, B. J. DRAKULIĆ 2, I.O. JURANIĆ 3, S.Ž. DRMANIĆ 4 and B.Ž. JOVANOVIĆ 4 1 INOTEH-Belgrade, 2 Center for Chemistry IChTM, Belgrade, 3 Faculty of Chemistry, University ...
Editorial
doaj   +1 more source

Investigation of the reactivity of 4-pyrimidinecarboxylic, 6-hydroxy-4-pyrimidinecarboxylic and 5-hydroxyorotic acids with diazodiphenylmethane in various alcohols. Part III [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
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

Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
Rate constants for the reaction of diazodiphenylmethane with cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in nine aprotic solvents, as well as in seven protic solvents, at 30°C using the appropriate UV ...
VERA V. KRSTIC   +2 more
doaj   +3 more sources

Diarylmethyl Ethers for the Protection of Polyols

open access: yesJournal of Chemistry, Volume 2013, Issue 1, 2013., 2013
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

Effect of Temperature and Solvent on the 1,3-Dipolar Cycloaddition of Diazodiphenylmethane with Several Dipolarophiles [PDF]

open access: yesBulletin of the Chemical Society of Japan, 1982
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

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