期刊
CARBOHYDRATE RESEARCH
卷 339, 期 13, 页码 2197-2204出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2004.07.010
关键词
carbohydrates; deoxysugars; enoses; thioglycosides
Synthesis of 2-deoxy-1-thioglycosides from glycals, mediated by catalytic amounts of ceric ammonium nitrate is reported. Apart from the 2-deoxy-1-thioglycosides, formation of the 2,3-unsaturated enose, corresponding to the Ferrier product, is also observed, especially for the glucal substrates. A radical oxocarbenium ion and a thiolate intermediates are most likely to mediate the reaction. Upon synthesis of 2-deoxy-1-thioglycosides, few representative glycosylation reactions with both aglycosyl and glycosyl acceptors were performed and alpha-anomeric 2-deoxy glycosides were obtained exclusively. (C) 2004 Elsevier Ltd. All rights reserved.
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