The silica supported H3PW12O40 (a heteropoly acid) as an efficient and reusable catalyst for a one-pot synthesis of β-acetamido ketones by Dakin–West reaction

Silica supported heteropolyacid catalyzed dehydration of aldoximes to nitriles and alcohols to alkenes

“…Supported HPA has proven to be the efficient catalysts for several organic transformations such as C-alkylation (25), esterification (26), Ritter reaction (27), Bigenelli reaction (28), and DakinÁWest reaction (29). Our group has also explored the catalytic activity of HPA for various other transformations (30,31).…”

Efficient Synthesis of β-Acetamido Ketones by Silver(I) Triflate-Catalyzed Multicomponent Reactions

“…10 Recently, another new procedure for the formation of β-acetamido ketones through the MCRs of acetophenone, arylaldehyde, and acetyl chloride in acetonitrile has been developed. [11][12][13][14][15][16][17][18][19][20][21] This reaction has been extensively studied with the use of a variety of catalysts and reagents such as 20 and Amberlyst-15.…”

“…Although numerous methods for the synthesis of β-acetamido ketones have been reported, [11][12][13][14][15][16][17][18][19][20][21] there is still demand for simpler, less toxic, more effective, and milder catalysts. Our interest in developing a mild and efficient synthetic method that provides a variety of β-acetamido ketones has led us to looking into more convenient and safely usable catalysts.…”

NaHSO4•H2O as an efficient and eco-friendly catalyst for the one-pot multicomponent synthesis of β-acetamido ketones under mild and heterogeneous conditions

“…Recently, other synthetic methods have been used for the formation of β-acetamido ketones through the multicomponent condensation of aryl aldehydes, enolizable ketones and acetyl chloride in acetonitrile in the presence of Lewis or Brǿnsted acid catalysts such as sulfuric acid absorbed on silica gel, 12,13 [21][22][23][24] Nafion-H, 25 and sulfated zirconia. 26 In recent years, sodium hydrogen sulfate has gained much interest in the synthesis of octahydroxanthenes, 27 protection and deprotection, [28][29][30][31][32][33][34][35][36] nitration, 37,38 nitrosation, 39 oxidation, [40][41][42] synthesis of halide derivatives, 43,44 coupling of indoles 45 and synthesis of quinazolinones.…”