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.
Stereoretentive Reactions at the Anomeric Position: Synthesis of Selenoglycosides
作者:Feng Zhu、Sloane O'Neill、Jacob Rodriguez、Maciej A. Walczak
DOI:10.1002/anie.201802847
日期:2018.6.11
Reported is the stereospecific cross‐coupling of anomeric stannanes with symmetrical diselenides, resulting in the synthesis of selenoglycosides with exclusive anomeric control. The reaction proceeds without the need for directing groups and is compatible with free hydroxy groups as demonstrated in the preparation of glycoconjugates derived from mono‐, di‐, and trisaccharides and peptides (35 examples)
作者:David J. Chambers、Graham R. Evans、Antony J. Fairbanks
DOI:10.1016/j.tet.2004.07.005
日期:2004.9
Glycosyl selenoxides, generated in situ from selenoglycosides by a Sharpless-type oxidation, undergo facile syn elimination leading to 2-hydroxy and 2-amino glycals in high yield.