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GENERAL CHEMISTRY: REPORTS FROM G.B. BAGDASARYAN AND CO-RESEARCHERS ADD NEW DATA TO RESEARCH IN GENERAL CHEMISTRY
Science Letter
September 23, 2008
According to a study from Yerevan, Armenia, "A method of the
s,mthesis of triphenylpropargylphosphonium bromide is developed. Its
isomerization and hydration in various solvents are studied, and
reactions with secondary arnines, tricthylamine, and triphenylphosphine
are carried out."
"It is established that secondary arnines add to the intermediate
allene isomer with subsequent migration ofthe formed double
bond to the phosphorus atorn. The reaction of triethylamine with
trir.henylpropargyl and triphenylethynyl bromides occurs similarly to
alkaline hydrolysis involving attack of' the amine on the phosphorus
atom. Triphenylphosphine fornis with triphenylpropar-ylphosphonium
biomide a bis-salt with a terminal methylene group," wrote
G.B. Bagdasaryan and colleagues (see also General Chemistry).
The researchers concluded: "Experimental evidence is obtained showinc
-, that for plioi;phoxazole derivatives to form from oxiines derived
from triphenyl(oxomethyl)phosphonium salts tha latter should bear an
aryl substituent at the keto group."
Bagdasaryan and colleagues published the results of their research in
Russian Journal of General Chemistry (Synthesis and transformations
of triphenylpropargylphosphonium bromide. Russian Journal of General
Chemistry, 2008;78(6):1177-1183).
For additional information, contact G.B. Bagdasaryan, National Academy
Science Armenia, Institute Organ Chemical, Ul Z Kanakertsi 167A,
Yerevan 375091, Armenia.
The publisher of the Russian Journal of General Chemistry can be
contacted at: Maik Nauka, Interperiodica, Springer, 233 Spring St.,
New York, NY 10013-1578, USA.
Science Letter
September 23, 2008
According to a study from Yerevan, Armenia, "A method of the
s,mthesis of triphenylpropargylphosphonium bromide is developed. Its
isomerization and hydration in various solvents are studied, and
reactions with secondary arnines, tricthylamine, and triphenylphosphine
are carried out."
"It is established that secondary arnines add to the intermediate
allene isomer with subsequent migration ofthe formed double
bond to the phosphorus atorn. The reaction of triethylamine with
trir.henylpropargyl and triphenylethynyl bromides occurs similarly to
alkaline hydrolysis involving attack of' the amine on the phosphorus
atom. Triphenylphosphine fornis with triphenylpropar-ylphosphonium
biomide a bis-salt with a terminal methylene group," wrote
G.B. Bagdasaryan and colleagues (see also General Chemistry).
The researchers concluded: "Experimental evidence is obtained showinc
-, that for plioi;phoxazole derivatives to form from oxiines derived
from triphenyl(oxomethyl)phosphonium salts tha latter should bear an
aryl substituent at the keto group."
Bagdasaryan and colleagues published the results of their research in
Russian Journal of General Chemistry (Synthesis and transformations
of triphenylpropargylphosphonium bromide. Russian Journal of General
Chemistry, 2008;78(6):1177-1183).
For additional information, contact G.B. Bagdasaryan, National Academy
Science Armenia, Institute Organ Chemical, Ul Z Kanakertsi 167A,
Yerevan 375091, Armenia.
The publisher of the Russian Journal of General Chemistry can be
contacted at: Maik Nauka, Interperiodica, Springer, 233 Spring St.,
New York, NY 10013-1578, USA.