Synthesis of 3,4-dihydropyrimidin-2-ones (DHPMs) using mesoporous aluminosilicate (AlKIT-5) catalyst with cage type pore structure

An Efficient One-Pot Protocol for the Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-ones Using Metallophthalocyanines (MPcs) as Potent Heterogeneous Catalysts: Synthesis, Characterization, Aggregation and Antimicrobial Activity

“…The reaction can be catalyzed by Brønsted acids and/or by Lewis acids such as copper(II) trifluoroacetate hydrate and boron trifluoride. Furthemore running this reaction under heterogeneous condition is more promising since it involves the facile recovery and reuse of the expensive catalyst [11,12,13,14,15,16,17,18,19,20]. …”

Direct synthesis and characterization of highly ordered cobalt substituted KIT-5 with 3D nanocages for cyclohexene epoxidation

“…Very recently, Vinu et al successfully introduced a facile technique in which they controlled the n HCl =n Si and the molar water to hydrochloric acid (n H 2 O =n HCl ) ratios which can tune the local concentration of the H + ions in the synthesis mixture. They also successfully demonstrated the preparation of Al and Ti substituted nanoporous 2D and 3D materials such as SBA-15, SBA-1 and KIT-5 with a well-ordered porous structure and further investigated their performance in various organic transformations [12][13][14][15][16][17][18][19][20][21][22][23]. However, the preparation of cobalt containing KIT-5 materials has not been reported in the open literature so far.…”

Exploiting silver trifluoromethanesulfonate as efficient and reusable catalyst for the synthesis of dihydropyrimidine derivatives under different reaction environments

“…[2] Thus, from over the years, the core moiety of this heterocycles has gained a tremendous importance and several modified methodologies of the original Biginelli protocol. [11,12] The literature is enumerated with numerous synthetic efforts concerning Biginelli reaction, which were developed either by use of metal catalysts [13] like CaCl 2 , FeCl 3 or NiCl 2 , RuCl 3 , SnCl 2 , and GaCl 3 , metal triflates [14] like Bi (OTf) 3 , Yb (OTf) 3 , La (OTf) 3 , Ni (OTf) 2 , In (OTf) 3 , and Cu (OTf) 2 , morpholinium acetate/polyphosphonate ester, [15] or by various expensive nano catalysts [16] and ionic liquids. [17] Despite several of these reported procedures have limitations such as use of expensive reagents, use of toxic solvents or catalyst, use of concentrated acids, drastic workup conditions, long reaction time give low to moderate yields.…”