Citation: Long Zhang, Xing Xin Cao, Hai Xia Jiang, Biao Jiang, Yu Xin Cui. Characterizing some gossypol and gossypolone Schiff's bases by studying their fragmentation patterns with electrospray ionization tandem mass spectra[J]. Chinese Chemical Letters, ;2009, 20(6): 716-719. doi: 10.1016/j.cclet.2008.12.049 shu

Characterizing some gossypol and gossypolone Schiff's bases by studying their fragmentation patterns with electrospray ionization tandem mass spectra

a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China;
b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China

Received Date: 10 November 2008

To investigate the structural form of gossypol and gossypolone Schiff's bases, seven relevant Schiff's bases were synthesized and the electrospray ionization-tandem mass spectrometry (ESI-MS/MS) with low-energy collision-induced dissociation was used to analyze their fragmentations. A common fragmentation pathway with the loss of RNH₂ from those schiff's bases quasi-molecular ions was observed and proposed on the basis of their MS/MS spectra data. This common pathway indicated that those Schiff's bases existed mainly as the enamine form not the imine form previously showed in most reports.
- Gossypol Schiff's bases,
- Gossypolone Schiff's bases,
- ESI-MS,
- Enamine form,
- Imine form
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