5021-43-2Relevant articles and documents
Quinoxaline synthesis via oxidative cyclization reaction using metal-organic framework Cu(BDC) as an efficient heterogeneous catalyst
Dang, Giao H.,Vu, Yen T. H.,Dong, Quoc A.,Le, Dung T.,Truong, Thanh,Phan, Nam T. S.
, p. 189 - 195 (2015)
A metal-organic framework Cu(BDC) was synthesized, and characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR), atomic absorption spectrophotometry (AAS), and nitrogen physisorption measurements. The Cu(BDC) was employed as an efficient heterogeneous catalyst for the oxidative cyclization reaction between α-hydroxyacetophenone and phenylenediamine to form 2-phenylquinoxaline as the principal product. The optimal conditions involved the use of air atmosphere oxidant in toluene solvent at 100°C in 3 h. In addition, the Cu(BDC) exhibited higher catalytic activity in the quinoxaline synthesis reaction than that of others Cu-MOFs such as MOF-199, MOF-118, and Cu2(BDC)2(DABCO), and higher than that of Mn(BDC), and Ni2(BDC)2(DABCO). The Cu(BDC) catalyst could be recovered and reused several times without a significant degradation in catalytic activity.
Facile synthesis of multipodal MnO nanocrystals and their catalytic performance
Kim, Aram,Shin, Dongwoo,Kim, Mijong,Yoon, Chohye,Song, Hyunjoon,Park, Kang Hyun
, p. 1279 - 1283 (2014)
Multipodal manganese oxide nanocrystals, synthesized through the thermal decomposition of a Mn-oleate complex, exhibited catalytic activity for the synthesis of a quinoxaline derivative from a α-hydroxy ketone with a 1,2-diamine. The MnO nanocrystals are single crystalline and uniform multipodal, with an average estimated distance of (47 ± 2) nm between the tips of two pods. Multipodal MnO nanocrystals are synthesized through thermal decomposition of a Mn-oleate complex. The MnO nanocrystals are single crystalline and uniform multipodal with an average estimated distance of (47 ± 2) nm between the tips of the two pods. These nanocrystals can efficiently catalyze the synthesis of a quinoxaline derivative from an α-hydroxy ketone with a 1,2-diamine.
Direct C-2 arylation of quinoxaline with arylhydrazine salts as arylation reagents
Chen, Yi,Miao, Jing,Tang, Lei,Wang, Bing,Wang, Cong,Wang, Haibo,Wang, Jianta,Wang, Xing,Zhang, Jiquan,Zhu, Gaofeng
supporting information, (2022/03/15)
A transition metal-free synthesis of 2-arylquinoxaline is achieved by using arylhydrazine salt as an aryl radical arylation reagent and air as an oxidant in the presence of K2CO3. This protocol features metal-free, no additives, mild reaction conditions, environment friendly, and can be used to construct biologically active molecules containing 2-phenylquinoxaline structure.
Cobalt-catalyzed cross-coupling of nitrogen-containing heterocyclic phosphonium salts with arylmagnesium reagents
Cui, Yan-Ying,Na, Jin-He,Guo, Meng-Meng,Huang, Jie-Ying,Chu, Xue-Qiang,Rao, Weidong,Shen, Zhi-Liang
supporting information, (2022/02/16)
Cobalt-catalyzed cross-couplings of nitrogen-containing heterocyclic phosphonium salts with arylmagnesium halides proceeded efficiently with the aid of cobalt(II) catalyst and copper(I) salt in tetrahydrofuran at ambient temperature, producing the desired
