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- W2037564426 abstract "The present paper describes the chloroformate activation of pullulan by reaction with 4-nitrophenyl chloroformate. N.m.r. analysis indicated that the ester formation takes place preferentially at the C6 hydroxy groups of pullulan. It was further demonstrated that activation gives linear carbonates, aliphatic carbonates including cyclic five-membered carbonates, and non-strained aliphatic carbonates. All of these carbonates react with amines to yield the corresponding urethane derivatives. The 4-nitrophenyl chloroformate activation of pullulan is an easy method for obtaining amine-containing pullulan derivatives." @default.
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- W2037564426 date "1993-01-01" @default.
- W2037564426 modified "2023-10-16" @default.
- W2037564426 title "Chemical modification of pullulan: 2. Chloroformate activation" @default.
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- W2037564426 doi "https://doi.org/10.1016/0032-3861(93)90601-6" @default.
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