13224-79-8Relevant articles and documents
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)
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.
POLYBENZIMIDAZOLES AND METHODS OF MAKING AND USING THEREOF
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, (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.
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.
Synthesis and anthelmintic activity of 2,2'-disubstituted 5,5'-dibenzimidazolylsulfides and sulfones
Abuzar,Sharma,Visen,Gupta,Katiyar
, p. 416 - 419 (2007/10/02)
A number of substituted diphenylsulfides and sulfones (4-11) and 2,2'-disubstituted-5,5'-dibenzimidazolyl sulfides and sulphones (12-19) have been synthesized starting from 5-chloro-2-nitroacetanilide (3) and 4,4'-dichlorodiphenyl sulfone (9), respectively. Among the compounds tested against Ancylostoma ceylanicum in hamsters and Hymenolepis nana in rats and mice, 14, 15, 18 and 19 removed 100% of the worms at an oral dose of 25 mg/kg x 1 to 250 mg/kg x 3. Some of the compounds were tested for their blood schizontocidal activity against Plasmodium berghei in mice but none showed any activity up to an oral dose of 10 mg/kg given for 6 days.
Synthesis and Anthelmintic Activity of Bisbenzimidazole-2-carbamates
Viswanathan, N.,Joshi, B. S.,Gawad, D. H.,Gokhale, U. B.,Sidhaye, A. R.,Rajasekariah, G. R.
, p. 730 - 732 (2007/10/02)
The synthesis of bisbenzimidazole-2-carbamates (1-6) linked directly or by a one-atom bridge (CH2, CO, O, SO2, or S) at the 5 positions is described.Compound (4) shows interesting anthelmintic activity.