92636-38-9Relevant articles and documents
Utilization of caffeine carbon supported cobalt catalyst in the tandem synthesis of pyrroles from nitroarenes and alkenyl diols
Balasubramaniam, Bhuvaneshwari,Dhara, Partha,Gupta, Raju K.,Kundu, Sabuj,Panja, Dibyajyoti,Sau, Anirban
, p. 244 - 254 (2021/09/07)
Employing bio-waste caffeine carbon-supported heterogeneous cobalt catalyst, synthesis of various substituted pyrrole derivatives is reported. In this methodology, pyrroles were synthesized through coupling between nitroarenes and alkenyl diols in a tandem manner. Among all the heterogeneous catalysts Co(OAc)2-CC-800 displayed the highest catalytic activity. Preparative scale synthesis of pyrroles and synthesis of anti-tubercular agent 5-(4-(1H-pyrrol-1-yl)phenyl)-1,3,4-oxadiazole-2-thiol revealed the practical applicability of this protocol. Several kinetic experiments and Hammett studies were conducted to understand the probable mechanism and electronic effects on this transformation.
Nickel-catalyzed decarbonylation of: N -acylated N-heteroarenes
Morioka, Toshifumi,Nakatani, Syun,Sakamoto, Yuki,Kodama, Takuya,Ogoshi, Sensuke,Chatani, Naoto,Tobisu, Mamoru
, p. 6666 - 6671 (2019/07/17)
Nickel-catalyzed decarbonylation of N-acylated N-heteroarenes is developed. This method can be used to produce a variety of N-aryl heteroarenes, including pyrroles, indoles, carbazoles and phenoxazines, using benzoic acid derivatives as arylating reagents. Arylnickelamide intermediates that are relevant to the catalytic reaction were characterized by X-ray crystallography. When N-acylated benzimidazoles are used as substrates, decarbonylation accompanied 1,2-migration to form 2-arylated benzimidazoles.
Copper(I) Oxide/N,N′-Bis[(2-furyl)methyl]oxalamide-Catalyzed Coupling of (Hetero)aryl Halides and Nitrogen Heterocycles at Low Catalytic Loading
Pawar, Govind Goroba,Wu, Haibo,De, Subhadip,Ma, Dawei
supporting information, p. 1631 - 1636 (2017/05/22)
An easily prepared oxalic diamide is a powerful ligand for the copper-catalyzed coupling of aryl halides with nitrogen heterocycles. Only 1–2 mol% each of copper(I) oxide and N,N′-bis[(2-furyl)methyl]oxalamide (BFMO) are needed to form N-arylation products under mild conditions. More than 10 different types of nitrogen heterocycles are compatible with these conditions, thereby giving the corresponding N-arylation products. (Figure presented.).