Zeolite HSZ-360 as a new reusable catalyst for the direct acetylation of alcohols and phenols under solventless conditions

Selective Acetylation of Small Biomolecules and Their Derivatives Catalyzed by Er(OTf)3

“…Regioselective acetylation is one of the strategies that chemists have tentatively developed, over time, in order to maximize the different reactivity of the primary hydroxyl groups in polyols and carbohydrates to be used as constituents of many biologically active compounds [1][2][3][4]. In the literature, several methods have been developed for the preparation of acetyl derivatives, using zeolites [5], various metal salts such as Mg(ClO 4 ) 2 and Zn(ClO 4 ) 2 .6H 2 O [6,7], and some triflate catalysts or stoichiometric reagents [8,9].…”

Zinc dust: An extremely active and reusable catalyst in acylation of phenols, thiophenol, amines and alcohols in a solvent-free system

“…Acid catalyzed acylation mainly requires polymeric acids [12,13]; and metal chlorides [14][15][16], metal triflates such as Sc(OTf)3/Bi(OTf)3/Li(OTf)3 [17][18][19], metal perchlorates (LiClO4 /BiOClO4) [20,21] have also been utilized as Lewis acid catalysts for acylation of alcohols. Other reagents such as I2 [22,23], [bmIm][dca] ionic liquid [24], solid supported reagents like HClO4-SiO2 [25], Py/basic alumina [26], neutral Al2O3 [27], Clay [28,29], ZrOCl2·8H2O [30] polyphosphate ester [31] and very recently ZnO [32], Sm [33] and Mg(NTf2)2 [34] have been employed for the same purpose. In this paper, we are describing our work on the successful use of non-toxic, environmentally benign and inexpensive zinc dust as a catalyst for the acylation of phenols, thiophenol, amines and alcohols with acid chlorides.…”

N,N-dichloro-4-methylbenzenesulphonimide as a novel and efficient catalyst for acetylation of alcohols under mild conditions

“…1,2 The various catalysts developed for the activation of anhydrides include nucleophilic, 3,4 and electrophilic [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] reagents. However, these acetylation methodologies suffer from one or more disadvantages such as stringent conditions, use of hazardous materials (e.g.…”