AMMONOLYSIS OF URONIC ESTER GROUPS IN BIRCH XYLAN

@inproceedings{Wang1964AMMONOLYSISOU,
  title={AMMONOLYSIS OF URONIC ESTER GROUPS IN BIRCH XYLAN},
  author={Paul Y. Wang and Henry I. Bolker and Clifford Burrough Purves},
  year={1964}
}
Solvent-extracted white birch, kept near 20° in liquid ammonia under pressure for 72 h and then extracted with methanol to remove acetamide, retained 0.25% of amide nitrogen. Extraction of the very finely ground residual wood with hot water yielded 21% as a 4-O-methylglucuronoxylan containing 0.53% of amide nitrogen. Alkaline hydrolysis removed the amide absorption in the infrared and restored the normal xylan spectrum. These results, supported by various control experiments, showed that amide… CONTINUE READING