Acta Scientiarum Naturalium Universitatis Pekinensis

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The Comparative Study on Retro Diels-Alder(RDA) Fragmentation under Fast Atomic Bombardment(FAB) and Chemical lonization(CI)

LIN Xiaoyuan, HE Xiaoran, YU Zhenpei, XU Jiaxi   

  1. College of Chemistry and Molecule Engineering, Peking University, Beijing, 100871
  • Received:1996-09-06 Online:1997-03-20 Published:1997-03-20


林孝元, 贺晓然, 俞振培, 许家喜   

  1. 北京大学化学与分子工程学院,北京,100871

Abstract: The comparative study was carried out on RDA fragmentationof some derivatives of oxazinono-benzothiazepine under FAB and CI. It was found that the intensity ratio of product ions to protonated ion MH+ under FAB were significantly lower than that under CI. Itwas shown that the mechanism of protonation under FAB was quite different from that under CI. A proposal mechanism of protonation under FAB was discussed.

Key words: RDA fragmentation, FAB mechanism

摘要: 对一些嗪酮并苯并硫氮杂衍生物在FAB和CI条件下的RDA碎裂反应进行了比较研究。在FAB条件下,产物离子与质子化分子MH+的强度比明显低于CI。结果表明,FAB质子化机理与CI是不同的。本文对FAB质子化机理进行了探讨。

关键词: RDA碎裂, FAB机理

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