339061-90-4Relevant articles and documents
Mechanical ball milling auxiliary synthesis method 2 -amino -3 - cyano - 4H - pyran compound
-
Paragraph 0082-0083, (2021/11/10)
The invention relates to the technical field of chemical synthesis, and aims to solve the problems that 2 - amino -3 - cyano - 4H - pyran compounds are large in pollution and tedious in preparation in the prior art, and discloses a mechanical ball milling auxiliary synthesis method 2 -amino -3 - cyano - 4H - pyran compound which comprises the following steps: (a) the substrate 1. The substrate 2 and malononitrile were subjected to mechanical ball milling after addition of a protein catalyst and a grinding aid as a raw material. (b) Ball milling, the reactants are scraped off, the solvent is added, and the solvent is added, and after filtration, 2 - amino -3 - cyano - 4H - pyran compounds are prepared by column chromatography. The mechanical ball milling technology facilitates mutual contact of reactant molecules, realizes no solvent reaction, and is easily available to the environment. The method effectively realizes the green synthesis of 2 - amino -3 - cyano - 4H - pyran compounds, and is mild in preparation conditions, simple and convenient to operate and high in reaction rate.
Synthesis and characterization of a novel Fe3O4@SiO2-BenzIm-Fc[Cl]/BiOCl nano-composite and its efficient catalytic activity in the ultrasound-assisted synthesis of diverse chromene analogs
Mohammadi, Reza,Esmati, Somayeh,Gholamhosseini-Nazari, Mahdi,Teimuri-Mofrad, Reza
supporting information, p. 135 - 145 (2019/01/04)
In this study, a novel magnetically recoverable Fe3O4@SiO2-BenzIm-Fc[Cl]/BiOCl nano-composite was synthesized using a simple chemical co-precipitation method. This is the first time that a magnetic nano-catalyst bearing ionic liquid, ferrocene and BiOCl is synthesized. The Fe3O4@SiO2-BenzIm-Fc[Cl]/BiOCl nano-composite was characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and field emission scanning electron microscopy (FE-SEM) techniques. The catalytic activities of the novel magnetic nano-composite were evaluated in one-pot three-component synthesis of a wide variety of 2-amino-3-cyano-4H-chromene derivatives under ultrasound irradiation. A simple, facile and highly efficient ultrasound-assisted method was developed to synthesize 4H-chromene derivatives via one-pot, three-component reaction of aldehyde, malononitrile and active phenolic compounds (2-naphthol, 1-naphthol, 3-(dimethylamino)phenol, resorcinol and orcinol) at room temperature. The reaction of aldehyde, malononitrile and orcinol is newly introduced in this paper. The ultrasound-assisted synthesis protocol that was studied in this article exhibits some notable advantages such as short reaction times, operational simplicity, green reaction conditions, high yields and easy work-up and purification steps. In addition, the novel magnetic nano-composite could be easily recovered by an external magnetic field and reused for six-reaction cycles without significant loss of its catalytic activity.
Polyethyleneimine-modified superparamagnetic Fe3O4 nanoparticles: An efficient, reusable and water tolerance nanocatalyst
Khoobi, Mehdi,Delshad, Tayebeh Modiri,Vosooghi, Mohsen,Alipour, Masoumeh,Hamadi, Hosein,Alipour, Eskandar,Hamedani, Majid Pirali,Sadat Ebrahimi, Seyed Esmaeil,Safaei, Zahra,Foroumadi, Alireza,Shafiee, Abbas
, p. 217 - 226 (2015/01/08)
A novel magnetically separable catalyst was prepared based on surface modification of Fe3O4 magnetic nanoparticle (MNPs) with polyethyleneimine (PEI) via covalent bonding. [3-(2,3-Epoxypropoxy)propyl]trimethoxysilane (EPO) was used a
