1314322-84-3Relevant academic research and scientific papers
From waste biomass to solid support: Lignosulfonate as a cost- Effective and renewable supporting material for catalysis
Sun, Shaohuan,Bai, Rongxian,Gu, Yanlong
supporting information, p. 549 - 558 (2014/04/03)
Lignosulfonate (LS) is an organic waste generated as a byproduct of the cooking process in sulfite pulping in the manufacture of paper. In this paper, LS was used as an anionic supporting material for immobilizing cationic species, which can then be used as heterogeneous catalysts in some organic transformations. With this strategy, three lignin-supported catalysts were prepared including 1) lignin- SO3Sc(OTf)2, 2) lignin-SO3Cu(OTf), and 3) lignin-IL@NH2 (IL= ionic liquid). These solid materials were then examined in many organic transformations. It was finally found that, compared with its homogeneous counterpart as well as some other solid catalysts that are prepared by using different supports with the same metal or catalytically active species, the lignin-supported catalysts showed better performance in these reactions not only in terms of activity but also with regard to recyclability.
Manganese chloride as an efficient catalyst for selective transformations of indoles in the presence of a keto carbonyl group
Li, Minghao,Yang, Jie,Gu, Yanlong
, p. 1551 - 1564 (2011/08/03)
Catalysis by manganese chloride tetrahydrate was found to be effective for the selective transformation of indoles, with which the desired acid-catalyzed reaction could be promoted and, at the same time, a side reaction that also needs assistance of acid, the electrophilic reaction of indole with the co-existing keto carbonyl group, does not occur. Some acid-catalyzed reactions, such as the ring-opening reaction of 2-alkoxy-3,4-dihydropyran with indole, and transesterification of β-keto ester with an alcohol that contains a C-3 unsubstituted indole fragment, could be performed smoothly by using manganese chloride as catalyst. A new multicomponent reaction of indole, 3,4-dihydropyran and β-keto ester was also developed with catalysis by manganese chloride. Copyright
