Novel silica sodium carbonate (SSC): Preparation, characterization and its first catalytic application to the synthesis of new dihydropyrano[2,3-c]pyrazoles

Novel silica-supported molybdic acid (SSMA): an efficient catalyst for the synthesis of new azo dyes

“…In continuation of our interest in the development of novel, efficient, and green procedures for the synthesis of organic compounds [27,28] using safe catalysts [29][30][31], we decided to prepare azo coumarin dyes using SSMA. Firstly, 7-amino coumarins 3a and 3b were synthesized via a modified Pechmann condensation according to previous research [21].…”

Preparation, characterization and catalytic application of nano-Fe3O4@SiO2@(CH2)3OCO2Na as a novel basic magnetic nanocatalyst for the synthesis of new pyranocoumarin derivatives

“…However, the appearance of a peak at 10.53 conrms the connection of -OCO 2 Na in nanocatalyst. 26 Additionally, a broad peak at 13-28 in XRD pattern of catalyst indicates the existence of amorphous silica in the structure of the catalyst.…”

A Novel One‐pot Protocol for Silica Sodium Carbonate‐Catalyzed Synthesis of Pyrano[2,3‐h]coumarins

“…Recently, we have introduced SSC as a reusable silicasupported base catalyst [6]. As can be seen in Scheme 2, from the reaction of silica gel and thionyl chloride, silica chloride is prepared.…”