Iron containing di-cationic ionic liquid [DIL]2+[2FeCl4]2− as a highly efficient catalyst for the acylation of alcohols, phenols and amines

Barot, Yash B.; Anand, Vishal; Mishra, Roli

doi:10.1016/j.catcom.2023.106739

Cited by 1 publication

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,5 Several different catalysts developed for the activation of anhydrides include nucleophilic agents such as 4-dimethylaminopyridine (DMAP) 6 and Bu 3 P, 7 and Lewis acids such as CoCl 2 , [7][8][9] as well as diverse triflates Sc(OTf) 2 , 10 Ce(OTf) 2 , 11 Pd(PhCN) 2 (OTf), 12 TMSOTf, 13 In (OTf) 2 , 14 Bi(OTf) 3 , 15,16 Cu(OTf) 2 17,18 and Cu(CH 3 CN) 4 OTf, 19 TaCl 5 , 20 zeolites, 21 clays, 22 Nafion-H, 23 yttria-zirconia, 24 LiClO 4 25 and ion liquids. 26 However, these catalysts suffer from various limitations. Moreover, DMAP is highly toxic while Bu 3 P is flammable and undergoes aerial oxidation.…”

Section: Introductionmentioning

confidence: 99%

Novel base‐catalyzed acylation of benzenediols with vinyl acetate: a Hirshfeld surface study

Ali,

Isaev,

Chichigina

et al. 2024

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUNDThe present work describes the facile, fast and economic base‐catalyzed acylation of benzenediols with vinyl acetate. The Hirshfeld surface analysis of benzene‐1,4‐diol O,O′‐diacetate is also described. NaOH, KOH and K2CO3 were the bases used for the catalysis of the acylation of benzene‐1,x‐diols (x = 2, 3, 4) with vinyl acetate to obtain the corresponding O,O′‐diacetyl derivatives.RESULTSThe yields were quite good, up to 99% under solvent‐free conditions. This method represents an alternative ‘green’ process for the preparation of O‐acetyl derivatives of hydroxyaryls. The benzene‐1,4‐diol O,O′‐diacetate crystal structure was obtained and described using Hirshfeld surface analysis. A noticeable contribution of the C⋯H contacts is shown (16.7%), despite the insignificant area of the Hirshfeld surface occupied by the carbon atoms (9.4%). By using two‐dimensional fingerprint plots, it was proved that C⋯H contacts were due to the presence of π‐stacking. The O⋯H contacts (41.4%) were the most numerous ones, relating mainly to typical hydrogen bonds (de + di ≈ 2.6 Å). The high saturation of the C⋯H and O⋯H contacts (enrichment ratios (E) = 1.30 and 1.36, respectively), despite their smaller contribution to the overall surface as compared to the H⋯H contacts (E = 0.84), is shown.CONCLUSIONThe novelty of this work is the development of a method based on an inexpensive, safe and easy‐to‐use catalyst (K2CO3). This method is fast with high yields. Besides, it may be used for acylation at an industrial scale. © 2024 Society of Chemical Industry (SCI).

show abstract