615-16-7Relevant articles and documents
Synthesis of bis(2-imino-1,3-dimethylbenzimidazoline)s via reactions of a solvothermally prepared benzimidazolium chloride and diamines
Zuo, Shengli,Zhang, Fan,Liu, Jianjun,Zuo, Ang
, (2021)
The first solvothermal preparation of benzimidazolium chloride for the synthesis of bis(2-imino-1,3-dimethylbenzimidazoline) derivatives from readily available diamines is reported, including an optimized preparation of previously reported solvothermal synthesis of the benzimidazolium intermediate. Several primary diamines including both aliphatic and aromatic linkers were converted to the corresponding bis(guanidine)s in moderate to good yield.
Indium(III)-Catalyzed Synthesis of Primary Carbamates and N-Substituted Ureas
Jain, Isha,Malik, Payal
supporting information, p. 93 - 97 (2021/11/26)
An indium triflate-catalyzed synthesis of primary carbamates from alcohols and urea as an ecofriendly carbonyl source has been developed. Various linear, branched, and cyclic alcohols were converted into the corresponding carbamates in good to excellent yields. This method also provided access to N-substituted ureas by carbamoylation of amines. All the products were obtained by simple filtration or crystallization, without the need for chromatographic purification. Mechanistic investigations suggest that the carbamoylation reaction proceeds through activation of urea by O-coordination with indium, followed by nucleophilic attack by the alcohol or amine on the carbonyl center of urea. The inexpensive and easily available starting materials and catalyst, the short reaction times, and the ease of product isolation highlight the inherent practicality of the developed method.
PrVO4/SnD NPs as a Nanocatalyst for Carbon Dioxide Fixation to Synthesis Benzimidazoles and 2-Oxazolidinones
He, Zemin,Yu, Ping,Zhao, Yuzhen,Zhang, Huimin,Zhang, Yongming,Kang, Xiaoxi,Zhang, Haiquan,Sadeghzadeh, Seyed Mohsen
, p. 1623 - 1632 (2020/10/19)
Recently CO2 stabilization has received a great deal of attention because of its probable applications as a rich C1 resource and the synthesis of several fine chemicals can be accomplished through this stabilization. In this study, Sn(IV) doping dendritic fibrous nanosilica (SnD) supported PrVO4 nanoparticles as a catalyst (PrVO4/SnD) was synthesized by a in-situ procedure. The SnD with the ratios of Si/Sn in a variety of 6 to 40 were acquired through direct hydrothermal synthesis (DHS), and PrVO4 NPs on the surfaces of SnD were reduced in-situ. X-Ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray energy dispersive spectroscopy (EDS) were deployed for identifying the PrVO4/SnD. It is potentially a highly dynamic catalyst in the stabilization of CO2 for the production of 2-oxazolidinones and benzimidazoles. In addition, the catalyst is very easy to recycle and reuse without significant loss of active site Cu metal. Graphic Abstract: PrVO4/SnD NPs as a nanocatalyst for carbon dioxide fixation to synthesis benzimidazoles and 2-oxazolidinones. [Figure not available: see fulltext.]
