Multi-wall carbon nanotube supported Co (II) Schiff base complex: an efficient and highly reusable catalyst for synthesis of 1-amidoalkyl-2-naphthol and tetrahydrobenzo[b]pyran derivatives

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• 作者：Jamshid Rakhtshah and Sadegh Salehzadeh
• 刊名：Applied Organometallic Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：31
• 期：2
• 全文大小：2292K
• ISSN：1099-0739

文摘

An immobilized Co (II) Schiff base complex supported on multi-wall pan class="TH_term6">carbon nanotubespan> was synthesized and characterized using Fourier transform pan class="TH_term6">infrared spectroscopypan>, X-ray diffraction, scanning pan class="TH_term6">electron microscopypan>, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and pan class="TH_term6">inductively coupled plasmapan> pan class="TH_term6">mass spectrometrypan>. It was shown that the supported complex is a facile, eco-friendly, recyclable, reusable and green catalyst for three-component condensation of pan class="TH_term3">2-naphtholpan> and acetamide with various aldehydes for the synthesis of 1-amidoalkyl-2-naphthol derivatives under solvent-free conditions. Also, in a further study, the catalytic application was studied in the synthesis of tetrahydrobenzo[b]pyran derivatives via the pan class="TH_term4">condensation reactionpan> of pan class="TH_term1 TH_term3">malononitrilepan> and pan class="TH_term3">dimedonepan> with several aromatic aldehydes. The procedures suggested here for the synthesis of 1-amidoalkyl-2-naphthol and tetrahydrobenzo[b]pyran derivatives offer several advantages, such as stability, recyclability and eco-friendliness of the catalyst, simple experimental conditions, short reaction times, high to excellent yields and easy work-up.