| Literature DB >> 17920291 |
Zhi-Jun Wu1, Shi-Wei Luo, Jian-Wu Xie, Xiao-Ying Xu, Dong-Mei Fang, Guo-Lin Zhang.
Abstract
The Michael-Michael-retro Michael addition catalyzed by 9-amino-9-deoxyepiquinine was monitored and the major intermediates and catalyst in the catalytic cycle were detected and characterized using ESI-MS/MS for the first time. Some important isomeric intermediates including isomeric enamine and imine structures were tentatively differentiated and further studied by theoretical calculations. Fragment ions of protonated catalyst indicate that proton possibly influences the conformation of the catalyst.Entities:
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Year: 2007 PMID： 17920291 DOI： 10.1016/j.jasms.2007.09.002
Source DB: PubMed Journal: J Am Soc Mass Spectrom ISSN： 1044-0305 Impact factor: 3.109