Ding Li
2007
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Journal
Journal of Chinese Mass Spectrometry Society
Abstract
A gas chromatography method was employed to determine the purity of ethyl 7-chloro-2-oxohepanoate by area normalization method. Meanwhile, the main trace impurity, a by-product in ethyl 7-chloro-2-oxohepanoate was also separated and analyzed. To identify the structure of this main trace impurity, the product of ethyl 7-chloro-2-oxohepanoate was dissolved in ethyl acetate and analyzed by the gas chromatography-mass spectrometry method. The structure elucidation of ethyl 7-chloro-2-oxohepanoate and its main trace impurity by spectral data were discussed in detail. The trace impurity is identified as 6-chloro caproaldehyde.