54609-18-6Relevant academic research and scientific papers
Silica tungstic acid and sulphated silica tungstic acid as highly efficient solid acid catalysts for the synthesis of pyrrole derivatives
Moradgholi,Lari,Baratian
, p. 2924 - 2927 (2017/03/22)
In the present study silica supported tungstic acid (STA) and sulphated silica tungstic acid (SSTA) were applied as efficient and cost-effective solid acid catalysts in the synthesis of N-substituted pyrrole derivatives via the Paal–Knorr reaction of 2,5-hexadione with aromatic and aliphatic amines at room temperature. The reaction completed in short time under mild conditions with high yield. The catalysts could be easily recovered upon reaction completion. Structures of all products were confirmed by elemental analysis, FT-IR, 1H and 13C NMR spectra.
An efficient synthesis of N-substituted pyrroles catalyzed by MgI2 etherate
Zhang, Yongdong,Weng, Guodong,Chen, Jingyan,Ma, Danting,Zhang, Xingxian
, p. 131 - 135 (2015/02/19)
We describe a convenient and useful procedure for the synthesis of various 2,5-dimethyl-N-substituted pyrrole derivatives by the addition of 2,5-hexadione with aromatic amines, heteroaromatic amines and aliphatic amines catalyzed by MgI2 etherate (MgI2·(OEt2)n) in good to excellent yields.
Sulfamic acid as efficient and reusable catalytic system for the synthesis of pyrrole, furan, and thiophene derivatives
Luo, Haitang,Kang, Yuru,Li, Qi,Yang, Liming
, p. 144 - 148 (2008/09/18)
Sulfamic acid has been utilized for the first time as an efficient and reusable catalytic system for the synthesis of heteroaromatics such as pyrrole, furan, and thiophene derivatives from 1,4-diketones. This new procedure offers significant improvements in the reaction rates and yields in a shorter reaction time and a lower reaction temperature contrasted with the reported results. The recovered catalyst can be reused for subsequent runs with only a gradual decrease in activity. The most important feature is that the reaction process is homogeneous whereas the separation process is heterogeneous, which is often seen in other catalysts, and so it is a good character for technical application.
Synthesis and biological evaluation of 6-aryl-6H-pyrrolo[3,4-d]pyridazine derivatives: High-affinity ligands to the α2δ subunit of voltage gated calcium channels
Stearns, Brian A.,Anker, Naomi,Arruda, Jeannie M.,Campbell, Brian T.,Chen, Chixu,Cramer, Merryl,Hu, Tao,Jiang, Xiaohui,Park, Kenneth,Ren, Kun Kun,Sablad, Marciano,Santini, Angelina,Schaffhauser, Herve,Urban, Mark O.,Munoz, Benito
, p. 1295 - 1298 (2007/10/03)
A novel class of 6-aryl-6H-pyrrolo[3,4-d]pyridazine ligands for the α2δ subunit of voltage-gated calcium channels has been described. Substitutions in the aryl ring of the molecule were generally not tolerated, and resulted in diminished bindin
