An appraisal of oxoketene cycloaddition methodology for the synthesis of 2,6-dideoxysugars and fluorinated 2,6-dideoxysugars.
An appraisal of oxoketene cycloaddition methodology for the synthesis of 2,6-dideoxysugars and fluorinated 2,6-dideoxysugars.
复制标题
用于合成 2,6-二脱氧糖和氟化 2,6-二脱氧糖的氧乙烯环加成方法的评估。
DOI:
10.1039/b817672h
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发表时间:
2009
影响因子:
3.2
通讯作者:
Audouard C
中科院分区:
文献类型:
--
作者:
Audouard C
The cycloaddition reaction of acylketenes with vinyl ethers affords an extremely direct route to 2,6-dideoxysugars and their methyl ethers. The lithium enolate of commercial 2,6,6-trimethyldioxinone 3 was fluorinated in good yield to afford fluorinated dioxinone 8. An illustrative range of fluorinated 2,6-dideoxysugar derivatives was prepared via the acetyl ketene–vinyl ether cycloadduct. Electronic structure calculations were carried out to investigate the effect of the fluorine atom on ease of formation and subsequent reaction of the (fluoroacetyl)ketene reactive intermediate. A single fluorine atom lowers the barrier to fragmentation by ca. 7.5 kJ mol−1, consistent with experimental findings, but has almost no effect on the barrier to rate determining vinyl ether addition, or to oxoketene dimerisation.
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DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
Martin Vogtherr and;T. Peters
通讯作者:
T. Peters
影响因子:
3.6
作者:
Shumway;Ham;Moer;Whittlesey;Birney
通讯作者:
Birney
影响因子:
1.9
作者:
J. Nieschalk;D. O'Hagan
通讯作者:
J. Nieschalk;D. O'Hagan
DOI:
10.1002/chin.200448187
发表时间:
2004-06
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
William R. Roush;R. Jeffrey Neitz
通讯作者:
William R. Roush;R. Jeffrey Neitz
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
J. Jünnemann;I. Lundt*;J. Thiem;C. Ivanov;R. Atanasova;A. Napoli;G. Sindona;D. Aksnes;G. Francis
通讯作者:
G. Francis