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.
Mechanochemical Synthesis of 2-Arylquinoxalines and 3-Arylquinoxalin-2(1H)-ones via Aryldiazonium Salts
Liu, Fu,Chen, Li-Ning,Chen, Ai-Min,Ye, Zhi-Peng,Wang, Zhi-Wei,Liu, Zhi-Lin,He, Xian-Chen,Li, Shu-Hui,Xia, Peng-Ju
supporting information, p. 1080 - 1084 (2022/02/21)
A green synthesis strategy of 2-arylquinoxalines and 3-arylquinoxalin-2(1H)-ones via ball milling, which could avoid copious solvent waste, was accomplished in this work. Aryl radicals were produced from aryldiazonium salts by using a solvent-free or catalyst-free single electron transfer process induced by mechanical force, affording a series of 2-arylquinoxalines and 3-arylquinoxalin-2(1H)-ones with 28%–85 yield. (Figure presented.).
Tetrabutylammonium Bromide-Catalyzed Transfer Hydrogenation of Quinoxaline with HBpin as a Hydrogen Source
Guo, Qi,Chen, Jingchao,Shen, Guoli,Lu, Guangfu,Yang, Xuemei,Tang, Yan,Zhu, Yuanbin,Wu, Shiyuan,Fan, Baomin
, p. 540 - 546 (2021/12/27)
A metal-free environmentally benign, simple, and efficient transfer hydrogenation process of quinoxaline has been developed using the HBpin reagent as a hydrogen source. This reaction is compatible with a variety of quinoxalines offering the desired tetrahydroquinoxalines in moderate-to-excellent yields with Bu4NBr as a noncorrosive and low-cost catalyst.
