32560-26-2Relevant academic research and scientific papers
Ruthenium complexes of phosphine-amide based ligands as efficient catalysts for transfer hydrogenation reactions
Yadav, Samanta,Vijayan, Paranthaman,Yadav, Sunil,Gupta, Rajeev
, p. 3269 - 3279 (2021/03/16)
This work presents three mononuclear Ru(ii) complexes of tridentate phosphine-carboxamide based ligands providing a NNP coordination environment. The octahedral Ru(ii) ion shows additional coordination with co-ligands; CO, Cl and CH3OH. All three Ru(ii) complexes were thoroughly characterized including their crystal structures. These Ru(ii) complexes were utilized as catalysts for the transfer hydrogenation of assorted carbonyl compounds, including some challenging biologically relevant substrates, using isopropanol as the hydrogen source. The binding studies illustrated the coordination of the isopropoxide ion by replacing a Ru-ligated chloride ion followed by the generation of the Ru-H intermediate that was isolated and characterized and was found to be involved in the catalysis.
H-type zeolite-catalyzed 1,4-addition of benzene derivatives to labile acrolein
Hayashi, Daijiro,Narisawa, Tomoyuki,Masui, Yoichi,Onaka, Makoto
, p. 460 - 471 (2016/04/26)
The 1,4-addition of benzene derivatives to acrolein is a straightforward way to synthesize 3-arylpropanals. A survey of acid catalysts for the 1,4-addition of methoxy-substituted benzenes to acrolein revealed that H-Beta and H-Y were the most suitable catalysts. We hypothesized three side-reactions: (1) the double 1,4-addition of acrolein to the starting benzene derivatives, (2) the Friedel-Crafts-type alkylation to the desired product, and (3) the self-polymerization of acrolein. The type (3) side-reaction was inhibited by two different methods which kept the concentration of acrolein low in the reaction mixture or in the zeolite pores. First, acrolein monomers were in situ generated through the gradual monomerization of an acrolein cyclic trimer. Second, using a reaction solvent lowered the acrolein concentration in the zeolite pores due to the competitive adsorption. We discovered that the content of monomeric acrolein in a solvent was closely related to the polarity of the solvent. Actually, both methods improved the yields for the 1,4-additions of 1,3-dimethoxybenzene to acrolein. Other electron-rich benzene derivatives, such as phenol and N, N-dimethylaniline, were also applicable to the 1,4-addition reactions.
Synthesis of Furo[2,3b]furans and Furo[2,36]pyrans via rhodium-catalyzed tandem hydroformylation/acetalization
Roggenbuck, Rafael,Schmidt, Andreas,Eilbracht, Peter
, p. 289 - 291 (2007/10/03)
Chemical equation presented Rhodium-catalyzed tandem hydroformylation/acetalization of α,ω-alkenediols gives facile access to perhydrofuro[2,3b]furans and perhydrofuro-[2,3b]pyrans in good yields. Similarly, benzoannelated tetrahydrofuro[2,3b]furans are o
Synthesis and nucleophilic substitution reactions of mono α-fluoro ethers
Ringom, Rune,Benneche, Tore
, p. 41 - 47 (2007/10/03)
Mono α-fluoro ethers have been prepared by cleavage of α-alkoxy sulfoxides with diethylaminosulfur trifluoride (DAST) and by an exchange reaction of the corresponding α-chloro ether with tetrabutylammonium fluoride (TBAF). The reactivity of different α-fluoro ethers in some nucleophilic substitution reactions has been investigated. Copyright Acta Chemica Scandinavica 1999.
