Phloroglucinol-type 3-deoxyanthocyanidins were synthesized through the interaction between phloroglucinol derivatives and arylethynylketones in acetic acid in the presence of aqueous hexafluorophosphoric acid. This methodology was applied to achieve the synthesis of natural apigeninidin, luteolinidin and tricetanidin with high yields.
The first totalsynthesis of dracaenins A and B is achieved in four steps. The synthesis features the convergent coupling of three readily available fragments with minimized use of protecting groups. The chemical synthesis enables the discovery of their activity in stimulating platelet aggregation, and thus, sheds light on the possible origin of the hemostatic effect of dragon's blood.
dracaenins A 和 B 的首次全合成分四个步骤完成。该合成的特点是三个容易获得的片段的会聚偶联,同时最大限度地减少了保护基团的使用。化学合成使人们能够发现它们在刺激血小板聚集方面的活性,从而揭示了龙血止血作用的可能来源。