Molecularly imprinted polymers bearing atrazine transforming activity were prepared by using newly designed templates that are atrazine analogues attached with an allyl or a styryl group via a disulfide bond at the 6-position, methacrylic acid as a functional monomer and styrene/divinylbenzene as crosslinkers. After polymerization, the disulfide bond was reduced to remove the atrazine moiety from the polymer matrix, followed by oxidation of the remaining thiol group to generate sulfonic acid (post-imprinting treatment), so that both a methacrylic acid residue and a sulfonic acid residue existed in an atrazine-imprinted cavity. The polymers indicated the selective binding of triazine herbicides and catalytic activity for methanolysis at the 6-position of atrazine, yielding a low toxic atraton.
Nucleophilic Radical Substitution Reaction of Triazine Herbicides with Polysulfides
作者:Weichun Yang、Jay J. Gan、Svetlana Bondarenko、Weiping Liu
DOI:10.1021/jf049505p
日期:2004.11.1
reaction was significantly inhibited by radical scavengers oxygen and 1,4-benzoquinone, suggesting involvement of freeradicals in the reaction. Spectral analysis of the reaction mixture using electron spin resonance showed that after the reaction, the freeradical concentration in polysulfide solution substantially decreased. These evidences indicate that radical sulfur anions may also be involved in
century, by activation of alcohols with activators, deoxygenative substitution of alcohols has been limited to employing nucleophiles with a single nucleophilic site. Herein, we demonstrate a fluoroolefin-mediated deoxygenative substitution of nonactivated and activated alcohols with diverse acidic nucleophiles, with inversion of configuration, to allow chemo- and enantiospecific construction of C–S, C–N
Synthesis and thermal decomposition of halogenalkoxy(thio)-sym -triazines. 12. Synthesis and certain transformations of 2-dialkylamino-4-oxo-6-cyanodihydrothiazolo-sym-triazines
作者:V. V. Dovlatyan、K. A. Eliazyan、A. V. Azatyan
DOI:10.1007/bf00475656
日期:1987.7
Reactions of derivatives of amino- and mercapto-sym-triazines with ethyleneimine and ethylenediamine
作者:V. V. Dovlatyan、K. A. �liazyan、V. A. Pivazyan、A. M. Akopyan