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- W2007066691 abstract "Selectively deuterated monomers for preparation of deuterated poly((dimethyliminio)propylene), poly((dimethyliminio)hexylene), and poly((dimethyliminio)decylene) have been synthesized:(2-2H2)-1,3-dibromopropane, (2,5-2H2)-1,6-dibromohexane, (1,10-2H2)-, (2,9-2H2)-, and (4,7-2H2)-1,10-dibromodecane and N,N,N′,N′-tetra-(2H2)-methyldecamethylenediamine. The syntheses of all dibromoalkanes involved a carboxylic acid or a carboxylic acid derivative either as starting compound or as an intermediate. (2-2H2)-1,3-Dibromopropane was synthesized from catalytically exchanged (NaO2H/2H2O) diethylmalonate by reduction with lithium aluminium hydride and bromination with HBr. (2,5-2H2)-1,6-Dibromohexane and (2,9-2H2)-1, 10-dibromodecane were prepared from base-catalytically (NaO2H/2H2O, 160°C) exchanged sodium salts of adipic and succinic acids, respectively, followed by reduction (LiA1H4) and bromination (HBr). (1,10-2H2)-1,10-Dibromodecane was prepared from succinic acid by reduction with LiA12H4 and subsequent bromination. (4, 7-2H2)-1,10-Dibromodecane was synthesized by coupling the lithiooxazoline salt of acetic acid with (2,5-2H2)-1,6-dibromohexane followed by synthetic steps analogous to those above. The synthesis of N,N,N′,N′-tetra-(2H2)- methyldecamethylenediamine was achieved by reductive amination between hexamethylenediamine and perdeuteroformaldehyde." @default.
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- W2007066691 date "1988-12-01" @default.
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- W2007066691 title "Deuterium labelling of poly((dimethyliminio)alkylenes)" @default.
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- W2007066691 doi "https://doi.org/10.1002/jlcr.2580251212" @default.
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