期刊
TETRAHEDRON LETTERS
卷 43, 期 32, 页码 5573-5577出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)01124-3
关键词
carbohydrates; glycosylation; glycosyl N-(phenyl)trifluoroacetimidates; lanthanides
The mild, moisture-stable and cheap catalyst Yb(OTf)(3) activates glycosyl N-(phenyl)trifluoroacetimidates in the stereoselective synthesis of 1,2-trans and 1,2-cis glycosides. A suitable choice of the reaction solvent led to good yields and stereoselectivity ratios. The protocol was successfully applied to acceptors and donors both exhibiting a wide range of reactivity. (C) 2002 Published by Elsevier Science Ltd.
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