poly n methylpyrrole

نتایج جستجو برای: poly n methylpyrrole

تعداد نتایج: 1044740 فیلتر نتایج به سال:

Synthesis of poly(N‐vinylisobutyramide) from poly(N‐vinylacetamide) and its thermosensitive property

Journal: :Journal of Polymer Science Part A: Polymer Chemistry 1996

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Rational design of specific binding hairpin Py-Im polyamides targeting human telomere sequences.

Journal: :Bioorganic & medicinal chemistry 2015

Chuanxin Guo Yusuke Kawamoto Sefan Asamitsu Yoshito Sawatani Kaori Hashiya Toshikazu Bando Hiroshi Sugiyama

N-Methylpyrrole (Py)-N-methylimidazole (Im) polyamides are organic molecules that can recognize predetermined DNA sequences in a sequence-specific manner. Human telomeres contain regions of (TTAGGG)n repetitive nucleotide sequences at each end of chromosomes, and these regions protect the chromosome from deterioration or from fusion with neighboring chromosomes. The telomeres are disposable buf...

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Synthesis and characterization of new heat-resistance polymers based on N- (4-carboxy phenyl) trimellitimide and aromatic diamines

Journal: Journal of the Iranian Chemical Research 2008

Khalil Faghihi, Mohammad Jalalian

Five new aromatic poly(amide-imide)s (5a-e) were synthesized by direct polycondensationreaction of N-(4-carboxy phenyl) trimellitimide (3) with five aromatic diamines (4a-e) by usingtriphenyl phosphite in N-methyl-2-pyrrolidone (NMP) and pyridine at solution containingdissolved CaCl2. All of the polymers were obtained in quantitative yields with inherentviscosities between 0.29-0.40 dL/g. The r...

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1,3-dichloro-5,5-dimethyl hydantoin and poly n,n′-dibromo-n-ethyl naphthyl-2,7-disulfonamide as efficient catalysts for the methoxymethylation of alcohols under solvent-free conditions

Journal: :iranian chemical communication 0

abbas amini manesh payame noor university, hamedan ardeshir khazaei faculty of chemistry, bu-ali sina university, p.o. box 651783868, hamedan, iran maedeh gohari department of chemistry, payame noor university, 19395-4697 tehran, i. r. of iran mahdieh chegeni department of chemistry, faculty of science, ayatollah ozma boroujerdi university, boroujerd, iran shahnaz saednia young researchers & elites club, toyserkan branch, islamic azad university, toyserkan, iran

methoxymethylation of a variety of alcohols was performed using formaldehyde dimethyl acetal in the presence of 1,3-dichloro-5,5-dimethyl hydantoin [dcdmh] and poly n,n′-dibromo-n-ethyl naphthyl-2,7-disulfonamide [pbns] as catalysts at room temperature and under solvent-free conditions. our experiments show that primary and secondary alcohols can be smoothly converted into the corresponding mom...

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