| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | heptakis(6-deoxy-6-iodo)cyclomaltoheptaose | 30754-23-5 | C42H63I7O28 | 1904.28 |
| —— | 2A,2B,2C,2D,2E,2F,2G,3A,3B,3C,3D,3E,3F,3G-tetradeca-O-acetyl-6A,6B,6C,6D,6E,6F,6G-heptachloro-6A,6B,6C,6D,6E,6F,6G-heptadeoxy-β-cyclodextrin | 123155-25-9 | C70H91Cl7O42 | 1852.64 |
| —— | heptakis(2,3-di-O-acetyl-6-O-methylsulfonyl)cyclomaltoheptaose | 23666-42-4 | C77H112O63S7 | 2270.16 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | heptakis(2,3-di-O-acetyl-6-deoxy)cyclomaltoheptaose | 51515-90-3 | C70H98O42 | 1611.52 |
| —— | heptakis(2,3-di-O-acetyl-6-deoxy-6-thiocyanato)cyclomaltoheptaose | 145932-44-1 | C77H91N7O42S7 | 2011.05 |
| —— | per-6-thio-β-cyclodextrin | 160661-60-9 | C42H70O28S7 | 1247.46 |
Recently, using structure-inspired drug design, we demonstrated that aminoalkyl derivatives of β-cyclodextrin inhibited anthrax lethal toxin action by blocking the transmembrane pore formed by the protective antigen (PA) subunit of the toxin. In the present study, we evaluate a series of new β-cyclodextrin derivatives with the goal of identifying potent inhibitors of anthrax toxins. Newly synthesized hepta-6-thioaminoalkyl and hepta-6-thioguanidinoalkyl derivatives of β-cyclodextrin with alkyl spacers of various lengths were tested for the ability to inhibit cytotoxicity of lethal toxin in cells as well as to block ion conductance through PA channels reconstituted in planar bilayer lipid membranes. Most of the tested derivatives were protective against anthrax lethal toxin action at low or submicromolar concentrations. They also blocked ion conductance through PA channels at concentrations as low as 0.1 nM. The activities of the derivatives in both cell protection and channel blocking were found to depend on the length and chemical nature of the substituent groups. One of the compounds was also shown to block the edema toxin activity. It is hoped that these results will help to identify a new class of drugs for anthrax treatment, i.e., drugs that block the pathway for toxin translocation into the cytosol, the PA channel.
Gold nanoparticles coated with cyclodextrins show enhanced plasmon-based photocatalytic activities by promoting catalyst–reactant approximation
Synthesis of star polymers with a β-cyclodextrin (CD) core was undertaken using the arm-first, then the core-first strategy. Cationic ring opening polymerisation (CROP) of 2-methyl-2-oxazoline (MeOx) was first initiated by allyl bromide, and then quenched with heptakis(6-deoxy-6-amino)β-CD in order to get a 7-arm star polymer. Then heptakis(6-deoxy-6-iodo-2,3-di-O-acetyl)β-CD was synthesised in order to get an initiator for the CROP of MeOx. Initiation and propagation kinetic measurements were undertaken and the ratio kp/ki was found to be too high to provide a controlled polymerisation. Using iodine as co-initiator allowed a decrease of the kp/ki ratio that gave better control of the polymerisation. DOSY NMR and viscosity characterisations were undertaken, and both techniques lead to the demonstration of a lower hydrodynamic volume of the star polymers versus the linear counterparts, for compounds of the same molecular weight.