催化学报 ›› 2015, Vol. 36 ›› Issue (4): 626-633.DOI: 10.1016/S1872-2067(14)60284-9

• 论文 • 上一篇    下一篇

Tin sulfide nanoparticles supported on activated carbon as an efficient and reusable Lewis acid catalyst for three-component one-pot synthesis of 4H-pyrano[2, 3-c]pyrazole derivatives

Nasir Iravania, Mosadegh Keshavarzb, Hossein Ali Shojaeian Kisha, Rasool Parandvarc   

  1. a Department of Chemistry, Faculty of Science, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran;
    b Department of Gas and Petroleum, Yasouj University, Gachsaran, Iran;
    c Young and Reasearcers Elite, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran
  • 收稿日期:2014-11-13 修回日期:2014-12-15 出版日期:2015-03-23 发布日期:2015-03-23
  • 通讯作者: Nasir Iravani, Mosadegh Keshavarz

Tin sulfide nanoparticles supported on activated carbon as an efficient and reusable Lewis acid catalyst for three-component one-pot synthesis of 4H-pyrano[2, 3-c]pyrazole derivatives

Nasir Iravania, Mosadegh Keshavarzb, Hossein Ali Shojaeian Kisha, Rasool Parandvarc   

  1. a Department of Chemistry, Faculty of Science, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran;
    b Department of Gas and Petroleum, Yasouj University, Gachsaran, Iran;
    c Young and Reasearcers Elite, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran
  • Received:2014-11-13 Revised:2014-12-15 Online:2015-03-23 Published:2015-03-23

摘要:

Tin sulfide nanoparticles (SnS-NPs) were prepared in aqueous solution at room temperature on the surface of activated carbon (AC) and were investigated using field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction, reflective ultraviolet-visible spectrophotometry, and spectrofluorimetry. Calculations based on the SEM and TEM images showed that the sizes of the SnS-NPs immobilized on the AC were 30-70 nm. The prepared nanocomposite was used as a heterogeneous Lewis acid catalyst for the three-components one-pot synthesis of 4H-pyrano[2,3-c]pyrazole derivatives in ethanol at 80 ℃. The reactions were efficiently performed in the presence of the prepared catalyst in short reaction times, and gave the desired products in high yields. This catalyst can be easily recovered by simple filtration and recycled up to eight consecutive times without significant loss of its efficiency.

关键词: Tin sulfide nanoparticle, Nanocomposite, Lewis acid catalyst, Heterogeneous catalyst, 4H-pyrano[2,3-c]pyrazole, Multicomponent reaction

Abstract:

Tin sulfide nanoparticles (SnS-NPs) were prepared in aqueous solution at room temperature on the surface of activated carbon (AC) and were investigated using field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction, reflective ultraviolet-visible spectrophotometry, and spectrofluorimetry. Calculations based on the SEM and TEM images showed that the sizes of the SnS-NPs immobilized on the AC were 30-70 nm. The prepared nanocomposite was used as a heterogeneous Lewis acid catalyst for the three-components one-pot synthesis of 4H-pyrano[2,3-c]pyrazole derivatives in ethanol at 80 ℃. The reactions were efficiently performed in the presence of the prepared catalyst in short reaction times, and gave the desired products in high yields. This catalyst can be easily recovered by simple filtration and recycled up to eight consecutive times without significant loss of its efficiency.

Key words: Tin sulfide nanoparticle, Nanocomposite, Lewis acid catalyst, Heterogeneous catalyst, 4H-pyrano[2,3-c]pyrazole, Multicomponent reaction