在FAB和CI条件下的RDA碎裂反应的比较研究  

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

作　　者：林孝元[1] 贺晓然[1] 俞振培[1] 许家喜[1] 

机构地区：[1]北京大学化学与分子工程学院

出　　处：《北京大学学报（自然科学版）》1997年第2期158-162,共5页Acta Scientiarum Naturalium Universitatis Pekinensis

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。The comparative study was carried out on RDA fragmentation of 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. It was shown that the mechanism of protonation under FAB was quite different from that under CI. A proposal mechanism of protonation under FAB was discussed.

关 键 词：RAD碎裂 恶嗪酮 苯并硫氮杂草 化学电离 FAB 

分 类 号：O626.5[理学—有机化学]