| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 黄芩苷 | baicalin | 21967-41-9 | C21H18O11 | 446.367 |
| 黄芩苷甲酯 | Baicalin methyl ester | 82475-03-4 | C22H20O11 | 460.394 |
| —— | 5,6,7-triacetoxyflavone | 67047-05-6 | C21H16O8 | 396.353 |
| —— | 5,6-Diacetoxy-7-hydroxyflavon | 67047-07-8 | C19H14O7 | 354.316 |
| —— | 5,6-Diacetoxy-7-benzyloxyflavon | 67047-06-7 | C26H20O7 | 444.441 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 黄芩素-7-甲醚 | 5,6-dihydroxy-7-methoxyflavone | 29550-13-8 | C16H12O5 | 284.268 |
| 黄芩素 | 5,6,7-trihydroxy-2-phenyl-4H-1-benzopyran-4-one | 491-67-8 | C15H10O5 | 270.241 |
In this study, we investigated the host–guest interactions between oroxin A (OA) and cucurbit[8]uril (Q[8]) using 1H NMR, MS, UV–vis and IR spectroscopy. The results showed that OA and Q[8] formed an inclusion compound (OA@Q[8]) with a molar ratio of 1:1 and a binding constant of 1.299 × 107 L·mol−1. In addition, the effect of Q[8] on the properties of OA was investigated through comparative experiments. The solubility of OA in water increased 22.47-fold when the concentration of Q[8] was 1 × 10−4 mol·L−1. Q[8] hardly affected the antioxidant capacity of OA, while the cumulative release of OA in gastric juice increased 2.3-fold after forming the inclusion compound with Q[8].
A novel environment-friendly method to access bioactive oroxin A through a one-pot/two-step process from naturally abundant and inexpensive baicalin is described.