(2-羟丙基)-β-环糊精

性质

Related Categories	Chelation/Complexation Compounds, Chemical Synthesis, Cyclodextrins, Signal Transduction Research Tools, Solubilizing Agents, 更多...
product line	BioReagent
form	powder
extent of labeling	4-10 (determined by NMR)
solubility	H2O: 100 mg/mL
suitability	suitable for cell culture

产品描述

Application

由于 HBC 和药物形成络合物，因此在水溶液中亲脂性药物的溶解度随着羟丙基-β-环糊精 (HBC) 的浓度线性增加。该客体-主体型络合物形成于药物和 HBC 的非极性腔之间，可引起增溶溶解。溶液可冻干生成易溶的粉末。对兔和小鼠无毒。

包装

5, 10 g in poly bottle

Preparation Note

Solutions may be stored for several months at 4°C. Solid should be stored tightly sealed at room temperature.

General description

Cyclodextrins are cyclic oligosaccharides consisting of 6, 7, or 8 glucopyranose units, usually referred to as α-, β-, or γ-cyclodextrins, respectively. These compounds have rigid doughnut-shaped structures making them natural complexing agents. The unique structures of these compounds owe their stability to intramolecular hydrogen bonding between the C2- and C3-hydroxyl groups of neighboring glucopyranose units. The molecule takes on the shape of a torus with the C2- and C3-hydroxyls located around the larger opening and the more reactive C6-hydroxyl aligned around the smaller opening. The arrangement of C6-hydroxyls opposite the hydrogen bonded C2- and C3-hydroxyls forces the oxygen bonds into close proximity within the cavity, leading to an electron rich, hydrophobic interior. The size of this hydrophobic cavity is a function of the number of glucopyranose units forming the cyclodextrin.

The solubility of natural cyclodextrins is very poor. In the late 1960’s, it was discovered that chemical substitutions at the 2, 3, and 6 hydroxyl sites would greatly increase solubility. Most chemically modified cyclodextrins are able to achieve a 50% (w/v) concentration in water.

Cavity size is the major determinant as to which cyclodextrin is used in complexation. The cavity diameter of β-cyclodextrins or β-glucopyranose unit compounds is well-suited for use with molecules the size of hormones, vitamins and many compounds frequently used in tissue and cell culture applications. For this reason, β-cyclodextrin is most commonly used as a complexing agent.