Regioselective synthesis of 4azido-Neu2en5,7Ac21Me and its intramolecular transformation to 4azido-Neu2en5,9Ac21Me
作者:Qingjie Zhao、Yuanyuan Lou、Ruisheng Xiong、Haihong Li、Jingshan Shen
DOI:10.1016/j.carres.2008.06.016
日期:2008.9
Methyl 5-N-acetyl-7-O-acetyl-4-azido-2,3-didehydro-2,4-dideoxy-neuraminic acid (4azido-Neu2en5,7 Ac(2)1Me) was synthesized regioselectively starting from 4azido-Neu2en5Ac1Me in high yield. The transformation of 4azido-Neu2en5,7Ac(2)1Me to the corresponding thermodynamically stable 4azido-Neu2en5,9Ac(2)1Me via intramolecular acetyl migration was confirmed by single-crystal X-ray diffraction analysis
甲基5-N-乙酰基-7-O-乙酰基-4-叠氮基2,3-didehydro-2,4-dideoxy-神经氨酸(4azido-Neu2en5,7 Ac(2)1Me)从4azido- Neu2en5Ac1Me高产量。通过单晶X射线衍射分析证实了4azido-Neu2en5,7Ac(2)1Me通过分子内乙酰基迁移到相应的热力学稳定的4azido-Neu2en5,9Ac(2)1Me的转化。讨论了建议的重排机制。