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FeO@纳米纤维素/Cu(ii)：一种用于合成4-嘧啶并[2,1-]苯并噻唑衍生物的生物基且可磁回收的纳米催化剂。

FeO@nano-cellulose/Cu(ii): a bio-based and magnetically recoverable nano-catalyst for the synthesis of 4-pyrimido[2,1-]benzothiazole derivatives.

作者信息

Safajoo Nasrin, Mirjalili Bi Bi Fatemah, Bamoniri Abdolhamid

机构信息

Department of Chemistry, College of Science, Yazd University Yazd P. O. Box 89195-741 Islamic Republic of Iran

Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan Islamic Republic of Iran.

出版信息

RSC Adv. 2019 Jan 11;9(3):1278-1283. doi: 10.1039/c8ra09203f. eCollection 2019 Jan 9.

DOI:10.1039/c8ra09203f
PMID:35518002
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9059560/
Abstract

FeO@nano-cellulose/Cu(ii) as a green bio-based magnetic catalyst was prepared through co-precipitation of Fe and Fe ions in an aqueous suspension of nano-cellulose. The mentioned magnetically heterogeneous catalyst was characterized by FT-IR, XRD, VSM, FESEM, TEM, XRF, EDS and TGA. In this research, the synthesis of 4-pyrimido[2,1-]benzothiazole derivatives was developed a three component reaction of aromatic aldehyde, 2-aminobenzothiazole and ethyl acetoacetate using FeO@nano-cellulose/Cu(ii) under solvent-free condition at 80 °C. Some advantages of this protocol are good yields, environmentally benign, easy work-up and moderate reusability of the catalyst. The product structures were confirmed by FT-IR, H NMR, and C NMR spectra.

摘要

通过在纳米纤维素的水悬浮液中共同沉淀铁离子和亚铁离子，制备了FeO@纳米纤维素/Cu(ii)作为绿色生物基磁性催化剂。通过傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、振动样品磁强计（VSM）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、X射线荧光光谱（XRF）、能谱仪（EDS）和热重分析（TGA）对上述磁性多相催化剂进行了表征。在本研究中，以FeO@纳米纤维素/Cu(ii)为催化剂，在80℃无溶剂条件下，通过芳香醛、2-氨基苯并噻唑和乙酰乙酸乙酯的三组分反应，开发了4-嘧啶并[2,1-]苯并噻唑衍生物的合成方法。该方法的一些优点是产率高、环境友好、后处理简单以及催化剂具有适度的可重复使用性。通过FT-IR、1H NMR和13C NMR光谱对产物结构进行了确证。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/a7d7e042710a/c8ra09203f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/4536d38a71e6/c8ra09203f-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/e6f8e0278018/c8ra09203f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/16005497939f/c8ra09203f-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/bb4d249103f2/c8ra09203f-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/a7d7e042710a/c8ra09203f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/4536d38a71e6/c8ra09203f-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/e6f8e0278018/c8ra09203f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/16005497939f/c8ra09203f-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/bb4d249103f2/c8ra09203f-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/339a/9059560/a7d7e042710a/c8ra09203f-f5.jpg

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