1-Benzenesulfinyl Piperidine/Trifluoromethanesulfonic Anhydride: A Potent Combination of Shelf-Stable Reagents for the Low-Temperature Conversion of Thioglycosides to Glycosyl Triflates and for the Formation of Diverse Glycosidic Linkages
作者:David Crich、Mark Smith
DOI:10.1021/ja0111481
日期:2001.9.1
piperidine (BSP) and trifluoromethanesulfonic anhydride (Tf(2)O) forms a new, powerful, metal-free thiophile that can readily activate both armed and disarmed thioglycosides, via glycosyl triflates, in a matter of minutes at -60 degrees C in dichloromethane, in the presence of 2,4,6-tri-tert-butylpyrimidine (TTBP). The glycosyl triflates are rapidly and cleanly converted to glycosides, upon treatment with
Method of forming glycosidic bonds from thioglycosides using an N,N-dialkylsulfinamide
申请人:——
公开号:US20040019198A1
公开(公告)日:2004-01-29
A method of forming a glycosidic bond utilizing an activated thioglycoside is disclosed. The thioglycoside is activated by an N,N-dialkylsulfinamide and trifluoromethanesulfonic anhydride. The method allows the facile synthesis of disaccharides, oligosacchraides, and polysaccharides in solution or on a polymer support.
Efficient one-step synthesis of 2-hydroxy and 2-aminoglycals from selenoglycosides
作者:David J. Chambers、Graham R. Evans、Antony J. Fairbanks
DOI:10.1016/s0040-4039(03)01216-4
日期:2003.7
2-Hydroxy and 2-aminoglycals are readily synthesised in one step from selenoglycosides by a Sharpless-type oxidation, which is then followed by spontaneous selenoxide elimination. (C) 2003 Elsevier Science Ltd. All rights reserved.