Ammonium salts catalyzed acetalization reactions in green ethereal solvents was written by Azzena, Ugo;Carraro, Massimo;Corrias, Martina;Crisafulli, Rosella;De Luca, Lidia;Gaspa, Silvia;Nuvoli, Luca;Pintus, Salvatore;Pisano, Luisa;Polese, Riccardo;Sanna, Michela;Satta, Giuseppe;Senes, Nina;Urtis, Luigi;Garroni, Sebastiano. And the article was included in Catalysts in 2020.Name: Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate The following contents are mentioned in the article:
Cyclopentyl Me ether and 2-methyltetrahydrofuran, low impact ethereal solvents forming a pos. azeotrope with water, were successfully employed as solvents in the synthesis of a variety of acetals carried out under Dean-Stark conditions in the presence of heterogeneous acidic catalysts. Under these conditions, ammonium salts, either as such or supported on SiO2, performed better or equally well than widely employed homogeneous and heterogeneous acidic catalysts such as p-toluenesulfonic acid, Amberlyst 15, or Montmorillonite K10. Several examples highlight the advantage of tuning the relative acidities of ammonium salts by appropriately selecting the counterion. Within one of these examples, our protocol clearly outweighs the classic p-toluenesulfonic acid/toluene protocol in terms of chemoselectivity. Silica-supported catalysts were characterized by SEM, TEM, and FTIR spectroscopies, as well as by N2 physisorption. Such a characterization reveals an even distribution of ammonium salts on silica, thus confirming the formation of expected catalytic supports. This study involved multiple reactions and reactants, such as Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate (cas: 6413-10-1Name: Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate).
Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate (cas: 6413-10-1) belongs to dioxole derivatives. Dioxoles, particularly fluorinated dioxoles, are used as co-monomers to make polymers that find use in forming protective coatings for chemical resistance. Although benzodioxole is not particularly important, many related compounds containing the methylenedioxyphenyl group are bioactive, and thus are found in pesticides and pharmaceuticals.Name: Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate
Referemce:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem