New environmentally-friendly solvent-free synthesis of imines using calcium oxide under microwave irradiation

Synthesis and Evaluation of Biological Activities of Some 2-Hydroxy-1-Naphthyl Bicyclo [2.2.1] Heptene-2-Yl-Methanones

“…Numerous metals and their oxides such as Si, Al, Fe, Ca, C, Mg, K, Na, S, Ti, P, Mn, organic mud and insoluble residues present in the fly-ash. 29 The waste fly-ash was used as a catalyst for organic synthesis. The fly-ash particles are in the silt-sized range of 2-50 microns.30 Glass, mullite-quartz, and magnetic spinel are the three major mineralogical matrices identified in fly ash.…”

“…From the statistical results of radical scavenging activity experiments, the observed antioxidant activities of methanones [29,30] were presented in Table 5. From Table 5, all bicyclic methanones are active and shows antioxidant activity referred to standard.…”

Perchloric acid catalyzed condensation of amine and aldehydes: Synthesis and antibacterial activities of some aryl (E)-imines

“…2(A-E). Antibacterial activities of imines petri-dishes (entries [6][7][8][9][10][11][12][13][14][15][16]. N -Control (DMSO); P -Standard drug (Ampicillin).…”

“…Schiff's bases are characterized by the -N=CH-imine group which find important in elucidating the mechanism of transamination and racemization reaction of biological system [1,2]. Many reagents have been used for the synthesis of optically active imines like Lewis acids [3], molecular sieves in ionic liquids [4], solid super acid K-10 montmorillonite [5], Tandam catalyst [6], MnO 2 [7], CaO [8], ZnCl 2 [9], MgSO 4 -PPTS [10], alumina [11], P 2 O 5 -SiO 2 [12], infrared [13], ultrasound radiation [14] and fly-ash:H 2 SO 4 with microwave irradiation. These catalysts were used for the synthesis of chiral imines by condensation of amines [15,16], with carbonyl compounds [5,6,17], alcohols [18] and acid chlorides [3,19].…”

Solvent-Free Synthesis and Spectral Linearity of Some (E)-2-(substituted benzylideneamino)-N-(3-chloro-4-fluorophenyl)-hexahydro-2<i>H</i>-cyclopenta[b]thiophene-3-carboxamides

“…The imine moieties are important intermediates and versatile starting materials for the synthesis of chiral amines [23,24], pyrimidine derivatives [25], phenylhydrazones [26,27], Mannich bases [28], indoles [29], quinoxalines [30], imidazoles [31], amino triphenylmethanes [32], Michael adducts [33], allyl products [34], optically active α-alkyl aldehydes [35,36] by hydrogenation [37], nucleophilic addition with organometallics [38] and cycloaddition reaction [39]. Many reagents have been used for the synthesis of optically active imines such as solid super acids, K-10 montmorillonite [40,41], Tandam catalysts [42], MnO 2 [43], CaO [44], ZnCl 2 [23,24], MgSO 4 -PPTS [26,27], alumina [45], Ti(OR) 4 [46], CuCl [47], MCM-41-SO 3 nanocatalyst [48], P 2 O 5 -SiO 2 [49] promoted by microwave irradiation [43], Cinchona alkaloid-thiourea [50], Infrared [51,52] and ultrasound radiation [53].…”