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Dextran was activated by reaction with 4‐nitrophenyl chloroformate. Analysis of the total carbonate content and the content of 4‐nitrophenyl carbonate moieties during the course of the reaction demonstrate the formation of different types of carbonate moieties. The 4‐nitrophenyl carbonate moieties are transformed into other carbonate structures most likely by reaction with neighbouring polymeric hydroxyls. This process is strongly enhanced by addition of a strong base.
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Vandoorne et al. (1985) studied this question.
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