中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 3,4-dimethoxy-5-nitrobenzoate | 148546-84-3 | C10H11NO6 | 241.2 |
3,4-二甲氧基苯甲酸甲酯 | methyl 3,4-dimethoxybenzoate | 2150-38-1 | C10H12O4 | 196.203 |
—— | methyl 3,4-dihydroxy-5-nitro-benzoate | 125629-01-8 | C8H7NO6 | 213.147 |
3,4-二羟基-5-硝基苯甲酸 | 3,4-dihydroxy-5-nitrobenzoic acid | 84211-30-3 | C7H5NO6 | 199.12 |
A concise and efficient synthesis of the proposed structure of aaptoline A, a 7,8-dihydroxyquinoline derived from a marine sponge, was accomplished in seven steps with a 52% overall yield. A key feature of the synthesis is the high-yielding Ag(I)-catalyzed cycloisomerization of the N-propargylaniline precursor to afford the quinoline carboxylate skeleton from acid-labile methyl aminobenzoate. However, the spectral data of the synthesized aaptoline A were not consistent with those of previous studies. The structure of the synthesized aaptoline A was confirmed by combined 2D NMR analysis. Additional studies on the bioactivity of the synthesized aaptoline A revealed that it has the ability to protect dopaminergic neurons against MPP+-induced neurotoxicity in C. elegans. In addition, impaired food-sensing ability and travel distance capability in C. elegans were significantly ameliorated by aaptoline A treatment, suggesting that aaptoline A can protect dopaminergic neurons both morphologically and functionally.