Antimalarials: Synthesis of 4-aminoquinolines that circumvent drug resistance in malaria parasites
作者:Dibyendu De、Larry D. Byers、Donald J. Krogstad
DOI:10.1002/jhet.5570340149
日期:1997.1
substitution with neat amine rather than in phenol, regioselective reductive alkylation to convert the terminal primary amine (12a–20a) on the diaminoalkane side chain to a diethylamino group, and purification by column chromatography with basic alumina. The 1H nmr spectra obtained after regioselective reductive alkylation with sodium borodeuteride (in comparison with sodium borohydride) demonstrated that
此处描述的策略已允许合成一系列4-氨基喹啉抗疟药。对先前合成方法的实质性改进包括用纯胺而不是苯酚进行亲核取代,区域选择性还原烷基化以将二氨基烷烃侧链上的末端伯胺(12a-20a)转化为二乙氨基,以及通过使用碱性氧化铝的柱色谱法进行纯化。用硼氘化钠(与硼氢化钠相比)进行区域选择性还原烷基化后获得的1 H nmr光谱表明,该还原烷基化是通过形成并随后原位还原相应的二酰胺而进行的。