中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
β-环糊精 | β-cyclodextrin | 7585-39-9 | C42H70O35 | 1135.0 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Lipodex C (heptakis(2,3,6-tri-O-pentyl)cyclomaltoheptaose) | 117340-78-0 | C147H280O35 | 2607.82 |
—— | Lipodex D (heptakis(3-O-acetyl-2,6-di-O-pentyl)cyclomaltoheptaose) | 120614-93-9 | C126H224O42 | 2411.14 |
—— | heptakis(3-O-benzyl-2,6-di-O-pentyl)-β-cyclodextrin | 143571-33-9 | C161H252O35 | 2747.75 |
—— | heptakis(2,6-di-O-pentyl)-β-cyclodextrin hepta(3-phenylcarbamate) | 143205-27-0 | C161H245N7O42 | 2950.74 |
Methodology for preparation of heptakis(2,6-di-O-alkyl)-β-cyclodextrins, heptakis(2-O-alkyl)-β- cyclodextrins, and heptakis(6-O-alkyl)-β-cyclodextrins in substantially purified form has been developed. Treatment of β-cyclodextrin (1) with sodium or barium hydroxide and various alkyl halides in dimethyl sulfoxide or a mixture of dimethyl sulfoxide and N,N-dimethylformamide provided the corresponding heptakis(2,6-di-O-alkyl)-β-cyclodextrins. Treatment of heptakis(6-O-t-butyldimethylsilyl)-β-cyclodextrin (5) with sodium hydroxide and several haloalkanes in dimethyl sulfoxide followed by desilylation provided heptakis(2-O-alkyl)-β-cyclodextrins. Protection of the secondary hydroxy groups of the t-butyldimethylsilyl-β-cyclodextrin (5) as benzyl ethers, followed by desilylation, alkylation, and debenzylation afforded several heptakis(6-O-alkyl)-β-cyclodextrins. Analytical methodology has been developed to characterize all of these compounds, with the homogeneity of the pattern of substitution verified by h.p.l.c. analysis, f.a.b.–mass spectrometry and n.m.r. spectroscopy.