Synthesis and characterisation of O-6-alkylthio- and perfluoroalkylpropanethio-α-cyclodextrins and their O-2-, O-3-methylated analogues
作者:Bernard Bertino Ghera、Florent Perret、Anne Baudouin、Anthony W. Coleman、Hélène Parrot-Lopez
DOI:10.1039/b703894a
日期:——
The synthesis of twelve alkylthio- or perfluoroalkylpropanethio-α-cyclodextrin derivatives and their O-2-, O-3-methylated analogues are described. The coupling reaction involves firstly the basic in situ hydrolysis of alkylperfluoropropane isothiouronium iodide or alkylisothiouronium bromide, then reaction with an α-cyclodextrin modified at the C-6 position by an iodine or methylsulfonyl group. The interfacial properties of these new compounds have been determined by the studies of their mono-molecular layer at the airâwater interface.
Control of the Regioselectivity for New Fluorinated Amphiphilic Cyclodextrins: Synthesis of Di- and Tetra(6-deoxy-6-alkylthio)- and 6-(Perfluoroalkypropanethio)-α-cyclodextrin Derivatives
Twelve new di- and tetraderivatized alpha-cyclodextrin molecules having either alkylthio and perfluoroalkylpropanethio functions at the primary face have been synthesized by using the procedure of Sinay for di-O-debenzylation of perbenzylated alpha-cyclodextrins. A new strategy of protection/deprotection has been developed for introducing the lipophilic chains. The coupling reaction involves the reaction