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Liu, Qiaoyun; Wang, Jing; Li, Junfei; Wang, Xiaolei; Lu, Shichao; Li, Xuan; Gong, Yaling; Xu, Shu
Molecules (Basel, Switzerland), 03/2017, Volume: 22, Issue: 3Journal Article
Separation of the enantiomers of new chiral alkynes in strategic syntheses and bioorthogonal studies is always problematic. The chiral column high-performance liquid chromatography (HPLC) method in general could not be directly used to resolve such substrates, since the differentiation of the alkyne segment with the other alkane/alkene segment is not significant in the stationary phase, and the alkyne group is not a good UV chromophore. Usually, a pre-column derivatization reaction with a tedious workup procedure is needed. Making use of easily-prepared stable alkyne-cobalt-complexes, we developed a simple and general method by analyzing the in situ generated cobalt-complex of chiral alkynes using chiral column HPLC. This new method is especially suitable for the alkynes without chromophores and other derivable groups.
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