Montmorillonite K-10 as a Reusable Catalyst for Fischer Type of Glycosylation under Microwave Irradiation
作者:Dipak K. Roy、Manobjyoti Bordoloi
DOI:10.1080/07328300802107437
日期:2008.7
Montmorillonite K10 catalyzed Fischer type glycosylation was studied for various monosacharides with different alcohols under microwaveirradiation. The method was found to be efficient, economic, simple and time saving and the catalyst montmorilloniteK-10 was reused three times without loss of catalytic activity and anomeric selectivity. With glycerol, the method gave products glycosylated at primary
[EN] TRITERPENE SAPONIN ANALOGUES<br/>[FR] ANALOGUES DE SAPONINE TRITERPÉNIQUE
申请人:ADJUVANCE TECH INC
公开号:WO2017079582A1
公开(公告)日:2017-05-11
The present application relates to triterpene glycoside saponin-derived adjuvants, syntheses thereof, and intermediates thereto. The application also provides pharmaceutical compositions comprising compounds of the present invention and methods of using said compounds or compositions in the treatment of and immunization for infectious diseases.
Disclosed is the trisaccharide .alpha.-D-Glcp-(1-2)-.alpha.-D-Glcp-(1-3)-.alpha.-D-Glcp and compounds related thereto as well as pharmaceutical compositions thereof.
Glycosidase inhibitors and methods of synthesizing same
申请人:Pinto Mario Brian
公开号:US20050065139A1
公开(公告)日:2005-03-24
A method for synthesizing Salacinol, its stereoisomers, and analogues, homologues and other derivatives thereof potentially useful as glycolsidase inhibitors. The compounds of the invention may have the general formula (I) or (II):
The synthetic schemes comprise reacting a cyclic sulfate with a 5-membered ring sugar containing a heteroatom (X). The heteroatom preferably comprises sulfur, selenium, or nitrogen. The cyclic sulfate and ring sugar reagents may be readily prepared from carbohydrate precursors, such as D-glucose, L-glucose, D-xylose and L-xylose. The target compounds are prepared by opening of the cyclic sulfates by nucleophilic attack of the heteroatoms on the 5-membered ring sugars. The resulting heterocyclic compounds have a stable, inner salt structure comprising a heteroatom cation and a sulfate anion. The synthetic schemes yield various stereoisomers of the target compounds in moderate to good yields with limited side-reactions.