Application of novel nanostructured dinitropyrazine molten salt catalyst for the synthesis of sulfanylpyridines via anomeric based oxidation

Magnetically Recoverable Catalysts: Catalysis in Synthesis of Polyhydroquinolines

“…The reaction can be visualized as proceeding through a Knoevenagel condensation product which is the key intermediate. In this step, the catalyst plays an important role in the condensation of the activated aldehydes (by the tribromide ions, [138,145] ionic liquids [141,146,147] and acid catalysts, including; (Lewis acid: transition metals [70,115,120,123,148] ) or (Brønsted-Lowry acid: acidic protons [131,135,149,150] )) with the active methylene compounds (dimedone or ethyl acetoacetate) in order to give an α,β-unsaturated intermediate. It is worth mentioning that, regarding the basic catalysts, the basic sites abstract the acidic proton of methylene compounds to promote the Knoevenagel condensation between the…”

“…Cu-SPATBA/Fe 3 O 4 65 98 [122] 10 Pd-SBTU@Fe 3 O 4 140 95 [123] 11 Ni (NO 3 ) 2 − Imine/Thiophene-Fe 3 O 4 @SiO 2 40 98 [124] 12 Fe 3 O 4 -DETA-Cu (II) 20 98 [28] 13 Fe 3 O 4 -Adenine-Ni 145 96 [115] 14 γ-Fe 2 O 3 /Cu@cellulose 15 98 [125] 15 Ru III @CMC/Fe 3 O 4 15 95 [126] 16 CoFe 2 O 4 @SiO 2 -CPTES-Guanidine-Cu (II) 10 95 [127] 17 Fe 3 O 4 -SA-PPCA 120 95 [128] 18 [135] 26 Fe 3 O 4 @D-NH-(CH 2 ) 4 -SO 3 H 9 0 8 6 [152] 27 Fe 3 O 4 -TEDETA-Br 3 120 92 [138] 28 Br 3 -TBA-Fe 3 O 4 10 98 [1] 29 Fe 3 O 4 MNPs-DETA tribromide 10 99 [139] 30 Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Im}C (NO 2 ) 3 18 89 [109] 31 Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Im}C (CN) 3 20 92 [147] 32 NMSMSA 20 93 [150] 33 AIL-SCMNPs 15 80 [141] 34 BIL@MNP 20 89 [142] 35 Fe 3 O 4 @SiO 2 -PEG/NH 2 20 96 [143] 36 Fe 3 O 4 @SiO 2 @PPh 3 @Cr 2 O 7 2− 15 98 [144] 37 Fe 3 O 4 @GA@IG 45 89 [38] a38 Isolated yield.…”

Ionically Tagged Magnetic Nanoparticles with Urea Linkers: Application for Preparation of 2-Aryl-quinoline-4-carboxylic Acids via an Anomeric-Based Oxidation Mechanism

“…In continuation of our efforts to develop catalysts bearing a urea moiety, − this exploration describes the facile synthesis of 2-aryl-quinoline-4-carboxylic acid derivatives in the presence of a catalytic amount of novel Fe 3 O 4 @SiO 2 @(CH 2 ) 3 –urea–thiazole sulfonic acid chloride relying on the expansion of our recently established concept, namely, anomeric-based oxidation (Scheme and ). − …”

1,10‐Phenanthroline‐Based Molten Salt as a Bifunctional Sulfonic Acid Catalyst: Application to the Synthesis of N‐Heterocycle Compounds via Anomeric Based Oxidation

“…The chemistry of quinazolines and quinazolinones have been comprehinslvly reviewed by Guiry and coworkers . In continuation of our previous investigation on designing and synthesis of novel nano molten salts,,,, target molecules such as quinazolinones, acridines and dihydropyridines,,, herein we wish to report 1,10‐phenanthroline‐based molten salt as a novel bifunctional sulfonic acid [Phen(SO 3 H) 2 ]Cl 2 with unique property, high catalytic ability and selectivity in the synthesis of a good range of N ‐heterocyclic compound under mild and green conditions (Scheme ).…”