18491-91-3Relevant academic research and scientific papers
POLYBENZIMIDAZOLES AND METHODS OF MAKING AND USING THEREOF
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Paragraph 0016; 0129, (2017/04/11)
Disclosed are polybenzimidazoles containing sulfonyl groups. The polymers can be synthesized in Eaton's reagent from 3,3′,4,4′-tetraaminodiphenylsulfone, which itself can be synthesized from 4,4′-dichlorodiphenylsulfone. Methods of synthesizing the polymers are disclosed. The disclosed polymers can be used for high temperature H2/CO2 separation membranes and other uses.
Synthesis and characterization of polybenzimidazoles derived from tetraaminodiphenylsulfone for high temperature gas separation membranes
Borjigin, Hailun,Stevens, Kevin A.,Liu, Ran,Moon, Joshua D.,Shaver, Andrew T.,Swinnea, Steve,Freeman, Benny D.,Riffle,McGrath, James E.
, p. 135 - 142 (2015/07/28)
Abstract A series of polybenzimidazoles containing sulfonyl groups were synthesized in Eaton's reagent for high temperature H2/CO2 separation membranes. The key monomer, 3,3′,4,4′-tetraaminodiphenylsulfone, was prepared via a novel and economical synthetic route starting from 4,4′-dichlorodiphenylsulfone. These polybenzimidazoles with sulfonyl moieties had enhanced solubilities in dipolar aprotic solvents relative to the commercial Celazole that is prepared from diaminobenzidine. Thermal gravimetric analysis showed that the materials were stable at elevated temperatures with 5% weight loss values of at least 485 °C in either air or N2. Glass transition temperatures of three polybenzimidazoles in this series were ascertained by dynamic mechanical analysis to be 438-480 °C. These sulfonyl-containing polybenzimidazoles exhibited excellent gas separation properties for H2/CO2. Polymers from tetraaminodiphenylsulfone and either terephthalic or isophthalic acid crossed Robeson's upper bound for H2/CO2.
The synthesis of diarylsulfones with simple arenes and K2S2O8 through double C-S bond formation
Yang, Yiqing,Chen, Zhang,Rao, Yu
, p. 15037 - 15040 (2014/12/11)
An unprecedented double C-S bond formation method has been developed to prepare both symmetric and unsymmetric diarylsulfones with simple arenes in a single step. This represents the first example that K2S2O8 can be employed as a highly effective sulfonating agent to synthesize diarylsulfones. The reaction demonstrates excellent reactivity, good functional group tolerance and high yields.
Synthesis and fungicidal activity of bis(2-arylcarbonylamino-1H- benzimidazol-5-yl) sulfones
Pilyugin,Kuznetsova,Sapozhnikov,Chikisheva,Kiseleva,Vorob'eva,Klimakova,Sapozhnikova,Davletov,Galeeva
, p. 446 - 450 (2008/09/19)
A procedure has been developed for the synthesis of bis(2- arylcarbonylamino-1H-benzimidazol-5-yl) sulfones by reaction of the corresponding substituted benzoyl chloride with sodium cyanamide and subsequent treatment of the N-cyanobenzamide thus formed with 3,3′,4,4′- tetraaminodiphenyl sulfone in acid medium. The products were tested for fungicidal activity.
Chemotherapeutically active nitro compounds. I. Nitroanilines
Winkelmann,Raether,Dittmar,et al.
, p. 681 - 708 (2007/10/05)
More than 200 nitro compounds, most of them nitroaniline derivatives substituted with one or more radicals having a basic reaction, were prepared and investigated as to their therapeutic activity against bacteria, fungi, protozoa, helminths, viruses and tumors. Several mono nitrobenzenes with a radical having a basic reaction showed a weak in vitro activity against gram positive bacteria and against Crocker's sarcoma 180; they also showed systemic activity against nematodes (Aspiculuris tetraptera) and viruses. The majority of therapeutically active compounds with pronounced in vitro activity against Trichomonas fetus, Entamoeba histolytica, Schistosoma mansoni, cestodes, nematodes (Ancylostoma caninum), viruses (influenza, MHV, SAV and EMC) and various types of carcinoma (Ehrlich's carcinoma, leukemia 1210, Crocker's sarcoma 180) were dinitrobenzene derivatives with one radical having a basic reaction and electropositive groups or unreactive or reactive chlorine atom, and di nitrobenzene with two equal or two different radicals having a basic reaction. Compound No. 70 revealed a marked in vitro activity against fungi (Trichophyton; Microsporum, Candida albicans). Other nitro compounds such as bis mono and bis dinitrobenzene derivatives likewise showed a systemic action against E. histolytica, viruses and, in particular, carcinoma (Crocker's sarcoma 180, Ridgway's osteosarcoma). Oxygen and sulfur analogue compounds as well as compounds produced by reduction also possessed a distinct activity against E. histolytica and viruses. On the basis of the present results, the dinitrobenzenes substituted with two radicals having a basic reaction include a number which have in common a recognizable structure/activity relationship in respect to E. histolytica, Schistosoma mansoni and different types of viruses. The activity against viruses in this class of compounds is probably due to an increased interferon production in the host animal. Whether the mechanism of action is the same against E. histolytica or Schistosoma mansoni has not been determined so far. A tumorigenic effect was observed mainly in those di nitrobenzenes which are classed as alkylating compounds. Because of the small chemotherapeutic index, the trials were not continued with the most effective compounds mentioned.
