98061-19-9Relevant articles and documents
Palladium-Catalyzed Oxidative C–H Alkoxycarbonylation of Arenes with Alkylcarbazates Directed by N-Heterocyclic Substituents
Yogesh Kumar, Gujjenahalli Ramalingaiah,Begum, Noor Shahina
, p. 4698 - 4704 (2020/07/04)
With alkyl carbazates as the green ester source, a novel palladium-catalyzed oxidative free radical carbonylative transformation of the C–H bond on aromatic rings to produce esters has been developed. Good yields of the corresponding products have been obtained with wide functional group tolerance and excellent regioselectivity. A variety of alkyl carbazates are found to be suitable reactants for the ortho-alkoxycarbonylation on the aromatic ring.
Palladium-Catalyzed Oxidative Carbonylation of Aromatic C?H Bonds with Alcohols using Molybdenum Hexacarbonyl as the Carbon Monoxide Source
Wang, Zechao,Li, Yahui,Zhu, Fengxiang,Wu, Xiao-Feng
, p. 2855 - 2859 (2016/09/13)
With molybdenum hexacarbonyl as the carbon monoxide source, a general palladium-catalyzed carbonylative transformation of the C?H bond on aromatic rings to produce esters has been developed. Good yields of the corresponding products have been obtained with wide functional group tolerance and excellent regioselectivity. A variety of aliphatic alcohols are suitable reactants here. (Figure presented.).
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.
