Тип публикации: статья из журнала
Год издания: 2020
Ключевые слова: brønsted acid catalyst, charge-assisted hydrogen-bonded framework, diels–alder, epoxide ring opening, heterogeneous catalyst
Аннотация: The acid-base neutralization reaction of commercially available disodium 2,6-naphthalenedisulfonate (NDS, 2 equivalents) and the tetrahydrochloride salt of tetrakis(4-aminophenyl)methane (TAPM, 1 equivalent) in water gave a novel three-dimensional charge-assisted hydrogen-bonded framework (CAHOF, F-1). The framework F-1 was charactПоказать полностьюerized by X-ray diffraction, TGA, elemental analysis, and H-1 NMR spectroscopy. The framework was supported by hydrogen bonds between the sulfonate anions and the ammonium cations of NDS and protonated TAPM moieties, respectively. The CAHOF material functioned as a new type of catalytically active Bronsted acid in a series of reactions, including the ring opening of epoxides by water and alcohols. A Diels-Alder reaction between cyclopentadiene and methyl vinyl ketone was also catalyzed by F-1 in heptane. Depending on the polarity of the solvent mixture, the CAHOF F-1 could function as a purely heterogeneous catalyst or partly dissociate, providing some dissolved F-1 as the real catalyst. In all cases, the catalyst could easily be recovered and recycled.
Журнал: Beilstein journal of organic chemistry
Выпуск журнала: Vol. 16
Номера страниц: 1124-1134
ISSN журнала: 18605397
Место издания: Frankfurt am Main
Издатель: Beilstein-institut