Carbohydrate‐Derived 3,2‐Enolones in the Base‐Catalyzed Rearrangement to Highly Functionalized C4‐Quaternary 4‐Hydroxy‐2‐cyclopentenones
Carbohydrate‐Derived 3,2‐Enolones in the Base‐Catalyzed Rearrangement to Highly Functionalized C4‐Quaternary 4‐Hydroxy‐2‐cyclopentenones
复制标题
碳水化合物â基础上衍生的3,2â烯醇酮â催化重排为高度功能化的C4â季铵4â羟基â2â环戊烯酮
DOI:
10.1002/ejoc.201700846
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发表时间:
2017
影响因子:
2.8
通讯作者:
T. Ziegler
中科院分区:
文献类型:
--
作者:
D. Borowski;R. M. Oechsner;E. Juergens;T. Ziegler
3,4,6‐O‐benzylated β‐2‐ulosides were subjected to 3,4‐elimination, providing carbohydrate‐derived 3,2‐enolones. Reaction of these enolones under basic conditions in polar aprotic solvents afforded highly functionalized racemic 5‐alkoxy‐2‐benzyloxy‐4‐benzyloxymethyl‐4‐hydroxy‐2‐cyclopentenones. The influence of the nature of the base as well as solvent effects were investigated. The rearrangement products obtained from this reaction exhibit a 4‐hydroxy‐C4‐quaternary stereogenic center. In contrast, the rearrangement of comparable dihydropyran‐3‐ones was reported to furnish theC5‐quaternary 5‐hydroxy‐2‐cyclopentenones. Plausible mechanisms for the described rearrangement and subsequent isomerization processes are given.
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影响因子:
2.7
作者:
Michael D. Urbaniak;L. Frost;J. Bingham;L. Kelland;J. Hartley;D. Woolfson;S. Caddick
通讯作者:
S. Caddick
影响因子:
1.8
作者:
S. Caddick;S. Cheung;L. Frost;S. Khan;G. Pairaudeau
通讯作者:
G. Pairaudeau
影响因子:
3.2
作者:
Hiromasa Ikeda;Erika Kaneko;Shunsuke Okuzawa;D. Takahashi;K. Toshima
通讯作者:
K. Toshima
影响因子:
2.1
作者:
H. Kolb;H. Hoffmann
通讯作者:
H. Hoffmann
影响因子:
3.1
作者:
M. Uhrig;O. Varela
通讯作者:
O. Varela