Applied Organometallic Chemistry (2019)
Update date:2022-09-26
Topics:
Javad Kalbasi, Roozbeh
Mesgarsaravi, Niloofar
Gharibi, Reza
Recently, acid–base bifunctional catalysts have been considered due to their abilities, such as the simultaneous activation of electrophilic and nucleophilic species and their high importance in organic syntheses. However, the synthesis of acid–base catalysts is problematic due to the neutralization of acidic and basic groups. This work reports a facial approach to solve this problem via the synthesis of a novel bifunctional polymer using inexpensive materials and easy methods. In this way, at the first step, heterogeneous poly (styrene sulfonic acid-n-vinylimidazole) containing pentaerythritol tetra-(3-mercaptopropionate) (PETMP) and trimethylolpropane trimethacrylate (TMPTMA) cross-linkers were synthesized in the pores of a mesoporous silica structure using click reaction as a novel bifunctional acid–base catalyst. After that, Ni-Pd nanoparticles supported on poly (styrenesulfonic acid-n-vinylimidazole)/KIT-6 as a novel trifunctional heterogeneous acid–base-metal catalyst was prepared. The prepared catalysts were characterized by various techniques like FT-IR, TGA, ICP-AES, DRS-UV, TEM, FE-SEM, EDS-Mapping, and XRD. The synthesized catalysts were efficiently used as bifunctional/trifunctional catalysts for one-pot, deacetalization-Knoevenagel condensation and one-pot, three-step and a sequential reaction containing deacetalization-Knoevenagel condensation-reduction reaction. It is important to note that the synthesized catalyst showing high chemo-selectivity for the reduction of nitro group, alkenyl double bond and ester group in the presence of nitrile. Moreover, it was found that the different nanoparticles including Ni, Pd, and alloyed Ni-Pd showing different chemo-selectivity and catalytic activity in the reaction.
View MoreJinan Decheng Hemu Medical Technology Co.,Ltd.
Contact:+86-531-68650525
Address:NO.554 Zhengfeng Road High-new Technology Development Zone
Contact:0086 16537861366
Address:building 17, shibei district Qingdao, shandong china
Fujian Wanke Pharmaceutical Co., LTD.
Contact:+86-598-5026002
Address:Economic development zone,jiangle county
Shanghai Yuanye Bio-Technology Co., Ltd.
website:http://www.shyuanye.com
Contact:+86-21-61845781
Address:Building 6, No. 465, Changta Road,Songjiang District,Shanghai,China
Contact:+86-571-86025531 / 86024803
Address:1218-24 Guangyin Mansion,42 Fengqi East Road
Doi:10.1016/j.tet.2004.09.084
(2004)Doi:10.1139/V06-032
(2006)Doi:10.1021/cg3016707
(2013)Doi:10.1016/j.bmcl.2021.127817
(2021)Doi:10.1039/jr9330001076
(1933)Doi:10.1021/ol060712f
(2006)