Microwave-Assisted Solvent-Free Rapid Synthesis of 4-Methyl Coumarin Derivatives by Using Silica functionalized-SO3H as an Effective Heterogeneous Catalyst

A novel silica gel functionalized-SO 3 H as a heterogeneous catalyst was prepared and characterized by FT-IR, XRD, TGA and elemental analysis. It has been studied for microwave-assisted solvent-free Pechmann condensation. The result revealed that 20% w/w silica bonded 3-mercapto propyl diethylene di...

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Published inPolycyclic aromatic compounds Vol. 41; no. 6; pp. 1212 - 1222
Main Authors Kalaria, Piyush N., Satasia, Shailesh P., Purohit, Vishal B., Avalani, Jemin R., Sapariya, Nirav H., Raval, Dipak K.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 22.07.2021
Taylor & Francis Ltd
Subjects
Catalysts
Chemical analysis
Condensates
Coumarin
Diamines
Green procedure
heterogeneous catalyst
microwave
Pechmann condensation
Silica
silica functionalized-SO
Silica gel
Silicon dioxide
solvent-free
Solvents
Sulfamic acid
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Summary:A novel silica gel functionalized-SO 3 H as a heterogeneous catalyst was prepared and characterized by FT-IR, XRD, TGA and elemental analysis. It has been studied for microwave-assisted solvent-free Pechmann condensation. The result revealed that 20% w/w silica bonded 3-mercapto propyl diethylene diamine N-sulfamic acid (SMPDDSA) was found to be effective. 4-methyl coumarin derivatives were the only product obtained in good to excellent yield (75-94%). The present protocol accomplishes the reaction in much lesser time as compared to the conventional method.
ISSN:1040-6638
1563-5333
DOI:10.1080/10406638.2019.1666887