期刊
TETRAHEDRON
卷 62, 期 7, 页码 1494-1501出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2005.11.019
关键词
pyrimidine; pseudouridine; cycloaddition
Isoxazole, isoxazoline and isoxazolidine analogues of C-nucleosides related to pseudouridine have been synthesized by 1,3-dipolar cycloaddition reactions of nitrile oxides and nitrones derived from mono and disubstituted uracil-5-carbaldehydes and 2,4-dimethoxypyrimidine-5-carbaldehyde. The dimethoxy derivatives have been easily deprotected to the corresponding uracils bearing the heterocyclic ring instead of a Sugar moiety. The regio and stereoselectivity of the reactions are discussed. (c) 2005 Elsevier Ltd. All rights reserved.
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