One-Pot, Highly Stereoselective Synthesis of Dithioacetal-α,α-Diglycosides
作者:Maria F. Céspedes Dávila、Jérémy P. Schneider、Amélie Godard、Damien Hazelard、Philippe Compain
DOI:10.3390/molecules23040914
日期:——
A one-step access to dithioacetal-α,α-diglycosides is reported. The synthetic strategy is based on the thioacetalization of aldehydes or ketones via highly stereoselective ring-opening of 1,6 anhydrosugars with bis(trimethylsilyl)sulfide.
Stereoselective synthesis of α-glycosyl azides by ring-opening of 1,6-anhydrosugars with trimethylsilyl azide
作者:Tianyu Cui、Raymond Smith、Xiangming Zhu
DOI:10.1016/j.carres.2015.08.002
日期:2015.10
We describe here an expedient and highly stereoselective procedure for the synthesis of alpha-glycosyl azides. Treatment of 1,6-anhydrosugars with trimethylsilyl azide in the presence of trimethylsilyl triflate led to the formation of alpha-glycosyl azides. All the reactions were highly stereoselective and afforded the alpha-glycosyl azides in good to excellent yields.
Substituted titanocene complexes have been prepared by hydrosilylation of organic substrates containing a terminal double bond by cyclopentadienyl complexes of titanium bearing a Si–H functional group. This new synthetic protocol is demonstrated by synthesis of mono-, bi- and trihomonuclear complexes. The structures of prepared compounds have been characterized by standard methods (NMR, IR, and HRMS).
Alpha-GLYCOSYL THIOLS AND alpha-S-LINKED GLYCOLIPIDS
申请人:Zhu Xiangming
公开号:US20100184711A1
公开(公告)日:2010-07-22
The present invention relates to stereoselective methods for the preparation of α-glycosyl thiols and α-S-linked glycosylceramides.
本发明涉及用于制备α-糖基硫醇和α-S-链接糖基酰胺的立体选择性方法。
A direct and stereospecific approach to the synthesis of α-glycosyl thiols
作者:Ravindra T. Dere、Yingxi Wang、Xiangming Zhu
DOI:10.1039/b804536d
日期:——
A new simple method for the synthesis of α-glycosyl thiols is described. Ring-opening of 1,6-anhydrosugars with commercially available bis(trimethylsilyl)sulfide under the action of catalytic amounts of TMSOTf smoothly afforded α-glycosyl thiols in very high yields and in a stereospecific way.