Abstract Per-2,3-di-O-methyl- and per-2,3-di-O-allyl-β-cyclodextrin duplexes held by two disulfide bonds between their primary faces have been prepared. Permethylation significantly increased the solubility of the cyclodextrinduplexes in a wide range of solvents from water to chlorinated hydrocarbons. Per-2,3-di-O-methylated duplexes are able to form inclusion complexes with organic molecules in aqueous
Synthesis of a cycloheptaose consisting of (1 → 4)-linked 7-amino-6,7-dideoxy-α-d-gluco-heptopyranosyl units: A new analog of cyclomaltoheptaose
作者:Hans H. Baer、Yaping Shen、Francisco Santoyo González、Antonio Vargas Berenguel、Joaquin Isac García
DOI:10.1016/0008-6215(92)80083-d
日期:1992.11
Approaches to chain extension al the C-6 positions in cyclomaltoheptaose (1) were examined with the aim of producing novel beta-cyclodextrin analogs composed of heptose or hepturonic acid units. Iron carbonyl-mediated methoxycarbonylation, and nucleophilic displacement by cyanide, in the fully acetylated heptakis(6-deoxy-6-iodo) and heptakis(6-O-mesyl) derivates of 1, respectively, were unsuccessful, as were similar reactions attempted with the newly synthesized, analogous allyl-protected derivatives of 1. However, reaction of unprotected heptakis(6-deoxy-6-iodo)cyclomaltoheptaose with lithium cyanide in N,N-dimethylformamide afforded a high yield of the corresponding heptakis(6-cyano-6-deoxy) compound, namely, cyclohepta-(1 --> 4)-(6-deoxy-alpha-D-gluco-heptopyranosid)urononitrile, catalytic hydrogenation of which gave the title compound, cyclo-(1 --> 4)-(7-amino-6,7-dideoxy-alpha-D-glucoheptopyrano)heptaose, isolated as its peracetyl derivative.
Tailoring β-Cyclodextrin for DNA Complexation and Delivery by Homogeneous Functionalization at the Secondary Face
作者:Fernando Ortega-Caballero、Carmen Ortiz Mellet、Loïc Le Gourriérec、Nicolas Guilloteau、Christophe Di Giorgio、Pierre Vierling、Jacques Defaye、José M. García Fernández
DOI:10.1021/ol802081z
日期:2008.11.20
An efficient general strategy for the incorporation of functional elements onto the secondary hydroxyl rim of beta-cyclodextrin has been developed and applied to the synthesis of a novel series of C-7-symmetric homogeneous macromolecular polycations with improved DNA complexing and delivery properties.