Synlett 2011(16): 2359-2362  
DOI: 10.1055/s-0030-1260313
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Stereoselective Glycosylation of 3-Deoxy-d-manno-2-octulosonic Acid with Batch and Microfluidic Methods

Atsushi Shimoyama, Yukari Fujimoto*, Koichi Fukase
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
Fax: +81(6)68505419; e-Mail: yukarif@chem.sci.osaka-u.ac.jp;
Further Information

Publication History

Received 9 June 2011
Publication Date:
13 September 2011 (online)

Abstract

A practical and efficient stereoselective synthesis of 3-deoxy-d-manno-2-octulosonic acid (Kdo) glycoside was achieved using N-trifluoroacetoimidate as the glycosyl donor with both batch and microfluidic methods. The method used a conformationally constrained glycosyl donor, which has a bulky isopropylidene group at the 4,5-O-position. The strained conformation directed the coordination of the acetonitrile solvent, which led to the enhancement of reactivity and α-selectivity in the glycosylation.

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IMM’s micromixer: http://www.imm-mainz.de.