Nanochannel-based {BaZn}-organic framework for catalytic activity on the cycloaddition reaction of epoxides with CO2 and deacetalization-Knoevenagel condensation was written by Lv, Hongxiao;Fan, Liming;Chen, Hongtai;Zhang, Xiutang;Gao, Yanpeng. And the article was included in Dalton Transactions in 2022.Application of 55490-87-4 This article mentions the following:
The rare combination of Ba(II) (5s) and ZnII (3d) in the presence of the structure-oriented TDP6– ligand generated the nanochannel-based hybrid material {[(CH3)2NH2]2[BaZn(TDP)(H2O)]·DMF·5H2O}n (NUC-51, H6TDP = 2,4,6-tri(2,4-dicarboxyphenyl)pyridine), which possesses excellent physicochem. characteristics such as nanoscopic channels, high porosity, large sp. surface area and high heat/water-resistance. This is the first 3D [BaIIZnII(CO2)6(H2O)]-based nano-porous host framework, whose activated state NUC-51a possesses the coexistence of Lewis acid-base sites including 4-coordinated Zn2+ ions, 7-coordinated Ba2+ ions, uncoordinated carboxyl oxygen atoms and Npyridine atoms. Catalytic experiments exhibited that activated NUC-51a possesses a high catalytic activity on the cycloaddition reactions of epoxides with CO2 at 55°C, which can be ascribed to its structural advantages of nanoscale channels and rich bifunctional active sites. Moreover, NUC-51a could significantly accelerate the deacetalization-Knoevenagel condensation reaction in DMSO solvent at 70°C. In the experiment, the researchers used many compounds, for example, 2-(Anthracen-9-ylmethylene)malononitrile (cas: 55490-87-4Application of 55490-87-4).
2-(Anthracen-9-ylmethylene)malononitrile (cas: 55490-87-4) belongs to nitriles. Trimerization of aromatic nitriles requires harsh reaction conditions, high temperatures, long reaction times, and pressure. In conventional organic reductions, nitrile is reduced by treatment with lithium aluminium hydride to the amine. Reduction to the imine followed by hydrolysis to the aldehyde takes place in the Stephen aldehyde synthesis, which uses stannous chloride in acid.Application of 55490-87-4
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts