Poly(4-vinylpyridinium butane sulfonic acid) hydrogen sulfate: An efficient, heterogeneous poly(ionic liquid), solid acid catalyst for the one-pot preparation of 1-amidoalkyl-2-naphthols and substituted quinolines under solvent-free conditions

Novel polymeric acidic ionic liquids as green catalysts for the preparation of polyoxymethylene dimethyl ethers from the acetalation of methylal with trioxane

“…The remaining chemicals used were of analytical grade and were used without further treatment. [13][14][15][16][17][18][19][20][21] As shown in Scheme 1, VIMBs or VPyBs (0.1 mol), AMPs (0.1 mol), AIBM (3.2 wt%), or DVB (0.1 mol), were mixed together in 200 mL ethanol in a round-bottom ask under stirring, and heated gradually to reux for an additional 48 h. Then, the mixture was kept for another 12 h at room temperature to form an organic gel. The white powder obtained aer ltration was washed thoroughly with ethanol (100 mL Â3), ethyl acetate (100 mL Â3) and ether (100 mL Â1) at room temperature.…”

“…The concentration of AILs on the surface of PAILs is higher compared with other supported AILs. The most common type of PAILs are those bearing pendant AILs and acid groups in a polymer chain, prepared from the polymerization of an AILs monomer or a precursor, including imidazolium ÀSO 3 H heteropolyanion, 13 poly(4-vinylpyridine), [14][15][16] copolymerization of AILs oligomers with divinylbenzene (DVB), [17][18][19][20] copolymerization of AILs oligomers with resorcinol-FA (RF resin), 21 and polymerization of 2-acrylamido-2-methyl-1propanesulfonic acid with butylamine or 2-(N,N-dimethylamino)ethyl methacrylate. 22 For example, Y. Leng 13 reported an acidic polymeric hybrid obtained from the polymerization of -SO 3 H functionalized polymeric ILs-cations with heteropolyanions.…”

Synthesis and characterization of polyvinylpyrrolidone immobilized on magnetic nanoparticles modified by ionic liquid as a novel and recyclable catalyst for the three‐component synthesis of amidoalkyl naphthols

“…These 1‐amidoalkyl‐2‐naphthols are of a certain value because of their promising biological and pharmacological activities . The synthesis of 1‐amidoalkyl‐2‐naphthols can be accomplished using condensation of aldehydes, amides, and β‐naphthol in the presence of various catalysts such as AIL@MNP, montmorillonite K‐10 clay, Fe 3 O 4 @SiO 2 @PMA, K 5 CoW 12 O 40 .3H 2 O, Ce (SO 4 ) 2 , silica sulfuric acid, sulfamic acid, SiO 2 ‐HClO 4 , NiFe 2 O 4 @SiO 2 –PPA, MCM‐41‐SO 3 H, Fe 3 O 4 ‐CNTs, POCl 3 /Na 2 B 4 O 7 , polyphosphate ester, MNPs‐PhSO 3 H, p ‐TSA, polymer‐supported sulphonic acid, ionic liquids, heteropoly acid, PPA‐SiO 2 , NaHSO 4 .SiO 2 , ZrO (OTf) 2 , NiO‐SnO 2 composite nano‐powder, SnCl 4 .5H 2 O, nano‐sulfated zirconia, dodecylphosphonic acid, ferric hydrogen sulfate and Bi (NO 3 ) 3 .5H 2 O…”

Synthesis of Some Amidoalkyl naphthol and Benzoxanthene Derivatives by Zinc Oxide Nanoparticles Catalyst Under Solvent Free Condition and Evaluation of Their Antimicrobial and Antioxidant Activities

“…It has been noted that 1-amidoalkyl-2-naphthols can be converted to hypotensive and bradycardia causing 1-aminomethyl-2-naphthol derivatives by amide hydrolysis reaction [2]. Besides to this, amidoalkyl naphthols can be converted to derivatives of 1,3-oxazines as an exclusive class of bioactive compounds that present in many biologically important natural products and drug candidates [3,4], which exhibit broad ranges of biological activities such as antihypertensive [5],analgesic [6], antirheumatic [7], antianginal [8],antibacterial, and antiviral [9] and antimalarial [10]. Synthesis of xanthenes and their derivatives, especially benzoxanthenes have also attracted considerable interest due to their various pharmacological activities, such as antibacterial [11], antifungal [12], analgesic [13], anti-inflammatory [14], anti-viral [15,16], antioxidant [17], anti-cancer [18,19], cytotoxic [20], antiproliferative properties [21].…”