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Title
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Multicomponent Synthesis of Tetrahydrobenzo[a]xanthene and Tetrahydrobenzo[a]acridine Derivatives using Sulfonated Multi-Walled Carbon Nanotubes as Heterogeneous Nanocatalysts
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Abstract
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This study is the first report of the application of sulfonated multi-walled carbon nanotubes (MWCNTs-SO3H) in the synthesis of tetrahydrobenzo[a]xanthene and tetrahydrobenzo[a]acridine derivatives. The catalyst was prepared via a chemical approach and the sulfonated groups were attached to the side-wall of MWCNTs with total density of 2.58 mmol.g-1. In order to prove functionalization of the MWCNTs-SO3H, the catalyst was characterized using FE-SEM, TEM, FT-IR, and Raman spectroscopy techniques. A three-component reaction including 2-naphthol, dimedone, and aromatic aldehydes were applied in the synthesis of tetrahydrobenzo[a]xanthene in the presence of 15.5 mol% of MWCNTs-SO3H under solvent-free conditions. Also, a four-component reaction including 2-naphthol, dimedone, aromatic aldehydes, and ammonium chloride was used in the synthesis of tetrahydrobenzo[a]acridine in the presence of 12.9 mol% of MWCNTs-SO3H under solvent-free conditions. All the derivatives of tetrahydrobenzo[a]xanthene and tetrahydrobenzo[a]acridine were obtained in good to excellent yields. The MWCNTs-SO3H was reused in seven consequent catalytic cycles without loss of their catalytic activity. Highlights
An efficient and reusable sulfonated multi-walled carbon nanotubes were prepared.
MWCNTs-SO3H was used in the synthesis of tetrahydrobenzo[a]xanthene and tetrahydrobenzo[a]acridine.
All of the reactions were performed under solvent-free conditions.
The MWCNTs-SO3H was characterized using FE-SEM, TEM, FT-IR, and Raman spectroscopy.
The catalyst could be reused for seven catalytic cycles.
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Scientific Type
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اكاديمي
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Journal volume
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vol.12,No.2
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Collaboration type
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مشترك
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Publish Date
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June 1, 2022
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Scopus status
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In Scopus
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Scopus index year
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2 022
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Scopus quarter
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3
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Scopus citation score
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3.099999905
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Clarivate status
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In Clarivate
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Clarivate index year
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2 022
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Clarivate impafact
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3.099999905
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Pub. Med. status
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Not In PubMed
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ISSN
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2252-0236
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Country (Publication)
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Iran
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Country type
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عالمية
شاكر محمود سعيد مصطفى
Iranian Journal of Catalysis (IJC)
College of Health and Medical Technologies
Academic Paper 