Carboxylate-Functionalized Zeolitic Imidazolate Framework Enables Catalytic N-Formylation Using Ambient CO2 was written by Li, Zhengyi;Li, Hu;Yang, Song. And the article was included in Advanced Sustainable Systems in 2022.Synthetic Route of C4H7NO This article mentions the following:
In this work, carboxylate-functionalized zeolitic imidazolate framework (F-ZIF-90) with good crystallinity and porosity was constructed from ZIF-90 and employed as a robust heterogeneous catalyst to boost the reductive N-functionalization of various amines with CO2 to furnish N-formyl compounds (up to 99% yield) in the presence of PhSiH3 under an ambient environment. The imidazole carboxylate species (COO-) can not only activate hydrosilane and CO2 to form the key intermediate formoxysilane but also activate amines to participate in the N-formylation reaction to obtain the target product. Moreover, it can enhance the catalyst capture and exchange ability toward ambient CO2. The powerful adsorption capacity of the F-ZIF-90 catalyst toward CO2 was conducive to elevating CO2 concentration around the active species. Theor. calculations showed that the carboxylate-mediated conversion path undergoes the transition state of hydrosilane activation with a relatively lower energy barrier (ΔG = 26.9 kcal mol-1). F-ZIF-90 exhibited good thermochem. stability with no obvious activity attenuation after repeated use 5 times. This strategy opens a new avenue based on ZIFs to develop heterogeneous catalysts for reductive upgrading of CO2. In the experiment, the researchers used many compounds, for example, N-Cyclopropylformamide (cas: 58644-54-5Synthetic Route of C4H7NO).
N-Cyclopropylformamide (cas: 58644-54-5) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. Amides are stable compounds. The lower-melting members (such as acetamide) can be readily purified by fractional distillation. Most amides are solids which have low solubilities in water.Synthetic Route of C4H7NO
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics