51130-02-0Relevant articles and documents
Room-temperature free-radical-induced polymerization of 1,1′-(methylenedi-1,4-phenylene)bismaleimide via a novel diphenylquinoxaline-containing hyperbranched aromatic polyamide
Baek, Jong-Beom,Ferguson, John B.,Tan, Loon-Seng
, p. 4385 - 4396 (2007/10/03)
Two new diphenylquinoxaline-containing AB2 monomers, 2,3-bis(4-aminophenyl)quinoxaline-6-carboxylic acid, 5 and 2,3-bis[4-(4-aminophenoxy)phenyl]quinoxaline-6-carboxylic acid, 9 were prepared and polymerized via the Yamazaki reaction to form th
CYANOHYDRINS AS SUBSTRATES IN BENZOIN CONDENSATION. REGIOCONTROLLED MIXED BENZOIN CONDENSATION
Rozwadowska, Maria D.
, p. 3135 - 3140 (2007/10/02)
O-Benzoylated cyanohydrins of aromatic aldehydes have been used as one of the substrates in the benzoin condensation.They were treated with aromatic aldehydes under phase-transfer conditions to result in benzoin benzoates.By this method aldehydes which fail to undergo condensation using traditional conditions could be converted into benzoins.By the Umpolung of reactivity of the pertinent aldehyde it was possible to prepare both isomeric unsymmetrical benzoins, including the thermodynamically less stable ones.
Studies on Pyrazolopyrimidine Derivatives. XIII. Aryl Migration of 4-Aroyl-1H-pyrazolopyrimidines to 4-Aryl-4,5-dihydro-1H-pyrazolopyrimidine-4-carboxylic Acids
Higashino, Takeo,Matsushita, Yasuhiko,Takemoto, Masumi,Hayashi, Eisaku
, p. 3951 - 3958 (2007/10/02)
When a mixture of 4-aroyl-1-phenyl-1H-pyrazolopyrimidines (3) and sodium hydroxide in dimethyl sulfoxide (DMSO) was stirred for 1 h at room temperature, migration of the aryl group to the 4-position occurred, i.e., the benzilic acid rearrangement,