1214622-46-4Relevant academic research and scientific papers
Ruthenium-catalyzed c-h silylation of 1-arylpyrazole derivatives and fluoride-mediated carboxylation: Use of two nitrogen atoms of the pyrazole Group
Mita, Tsuyoshi,Tanaka, Hiroyuki,Michigami, Kenichi,Sato, Yoshihiro
supporting information, p. 1291 - 1294 (2014/06/10)
Carboxylation of 1-arylpyrazole derivatives was developed using a ruthenium-catalyzed ortho silylation in conjunction with fluoride-mediated carboxylation with carbon dioxide. The two nitrogen atoms of pyrazole play crucial roles in promoting ortho silylation via the formation of a five-membered ruthenacycle and in accelerating aryl anion formation by lowering the electron density of the aromatic ring. Georg Thieme Verlag Stuttgart New York.
3,7-DIAZABICYCLO[3.3.1]NONANE AND 9-OXA-3,7-DIAZABICYCLO[3.3.1]NONANE DERIVATIVES
-
Page/Page column 59; 62, (2013/04/24)
The present invention relates to 3,7-diazabicyclo[3.3.1]nonane and 9-oxa-3,7- diazabicyclo[3.3.1 ]nonane derivatives of formula (I) wherein Ar1 and Ar2 are as described in the description, to their preparation, to pharmaceutically acceptable salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of formula (I), and especially to their use as orexin receptor antagonists.
Rhodium(I)-catalyzed direct carboxylation of arenes with CO2 via chelation-assisted C-H bond activation
Mizuno, Hajime,Takaya, Jun,Iwasawa, Nobuharu
supporting information; experimental part, p. 1251 - 1253 (2011/04/16)
Rh-catalyzed direct carboxylation of unactivated aryl C-H bond under atmospheric pressure of carbon dioxide was realized via chelation-assisted C-H activation for the first time. Variously substituted and functionalized 2-arylpyridines and 1-arylpyrazoles underwent the carboxylation in the presence of the rhodium catalyst and a stoichiometric methylating reagent, AlMe 2(OMe), to give carboxylated products in good yields. The catalysis is proposed to consist of methylrhodium(I) species as the key intermediate, which undergoes C-H activation to afford rhodium(III), followed by reductive elimination of methane to give nucleophilic arylrhodium(I). This approach demonstrates promising application of C-H bond activation strategy in the field of carbon dioxide fixation.
