Arrangement of several hydroxamic acid-derived substituents along the cavity of a cyclodextrin ring leads to compounds that detoxify tabun in TRIS-HCl buffer at physiological pH and 37.0 °C with half-times as low as 3 min.
General method for preparing altrosides from 2,3-manno-epoxides and its application to synthesis of alternative β-cyclodextrin with an altroside as the constituent of macrocyclic structure
A general and convenient method for preparing altrosides from 2,3-manno-epoxides is described and as the application, 2A(S),3A(R)-β-Cyclodextrin which has an altroside as the constituent was prepared and assigned;the altroside part has 1C4 conformation predominantly.
描述了一种由2,3-甘露聚糖环氧化物制备皂苷的通用且方便的方法,并且作为申请,制备并指定了以皂苷为成分的2 A(S),3 A(R)-β-环糊精。皂苷部分主要具有1 C 4构象。
New cyclodextrin dimers and trimers capable of forming supramolecular adducts with shape-specific ligands
supramolecular adducts. A series of CD dimers and trimers was prepared in good yields by carrying out the critical synthetic steps under power ultrasound (US) or microwave (MW) irradiation. Starting from azide and acetylenic CD derivatives, we exploited an efficient MW-promoted Huisgen 1,3-dipolar cycloaddition in the presence of Cu(I) salts. The resulting bridged CD derivatives gave stable adducts with m
Preparation of 2A,3A-alloepimino-2A,3A-dideoxy-β-cyclodextrin as a versatile scaffold candidate for the hetero-2A,3A-bifunctionalization
作者:Makoto Fukudome、De-Qi Yuan、Kahee Fujita
DOI:10.1016/j.tetlet.2004.12.076
日期:2005.2
3(A)-Azido-3(A)-deoxy-altro-beta-cyclodextrin, although having as many as 20 different hydroxyl groups, was selectively sulfortylated at the 2(A)-OH of the altrose residue by 2-mesitylenesulfonyl chloride to give 3(A)-azido-3(A)-deoxy-2(A)-O-mesitylenesulfonyl-altro-beta-cyclodextrin. A one-pot reduction-intramolecular substitution of the latter afforded the title compound as a promising intermediate for the introduction of two different functional groups to two different positions of one sugar unit, which has not been succeeded hitherto. (C) 2004 Elsevier Ltd. All rights reserved.
Hetero-bifunctionalization of the secondary face of β-cyclodextrin: selective 3G-sulfonylation and subsequent 2G,3G-epoxidation of 3A-azido-3A-deoxy-altro-β-cyclodextrin
3(A)-Azido-3(A)-deoxy-altro-beta-cyclodextrin, which has 20 different hydroxyl groups, was selectively sulfonylated by 1-naphthalenesulfonyl chloride at the 3(G)-OH of the glucoside residue as well as the 2(A)-OH of the altroside one. Alkali treatment of the 3(G)-sulfonate gave successfully the 2(G), 3(G)-epoxyalloside with the 3(A)-azido group being left unaffected. Both the 3(G)-sulfonate and 2(G),3(G)-alloepoxide species of 3(A)-azido-3(A)-deoxy-altro-beta-cyclodextrin not only have two sugar units being modified differently, but also can serve as versatile starting materials for the syntheses of bifunctional cyclodextrins with diverse combination of different functionalities. (c) 2006 Elsevier Ltd. All rights reserved.