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An Expeditious Route toStreptococciandEnterococciGlycolipidsViaRing-Opening of 1,2-Anhydrosugars with Protic Acids

 

作者: C.M. Timmers,   N.C.R. van Straten,   G.A. van der Marel,   J.H. van Boom,  

 

期刊: Journal of Carbohydrate Chemistry  (Taylor Available online 1998)
卷期: Volume 17, issue 3  

页码: 471-487

 

ISSN:0732-8303

 

年代: 1998

 

DOI:10.1080/07328309808002906

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

1,2-Anhydroglucose6reacts smoothly and with a high degree of stereoselectivity with a variety of carboxylic and phosphoric acids resulting in the formation of the predominantly β-oriented 1-O-acyl and 1-O-phosphorylglucoses7-17. This methodology has been successfully applied in the construction of glycolipids1a,b. Ring-opening of the 1,2-anhydroglucose derivative19with benzoic acid furnished exclusively the β-aligned key intermediate20. Subsequent ICDT-assisted chemoselective α-glucosylation of20with thioethyl donor21, followed by glycosidation of kojibiosyl benzoate22with glycerol acceptor23gave the fully protected α-diglucosyl glycerol derivative25, which upon desilylation (→28), acylation (→29 or 30) and deprotection afforded the target glycolipids1a-bin high overall yield.

 

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