Concise and Efficient Total Syntheses of Alkannin and Shikonin
摘要:
Two enantiomic natural products with wound-healing properties, alkannin (1) and shikonin (2), are accessible by a short and efficient total synthesis. The success was achieved by a novel protecting system for masking of 5,8-dihydroxy-1,4-naphthoquinones (naphthazarins) and a highly stereoselective ketone reduction.
Concise and Efficient Total Syntheses of Alkannin and Shikonin
摘要:
Two enantiomic natural products with wound-healing properties, alkannin (1) and shikonin (2), are accessible by a short and efficient total synthesis. The success was achieved by a novel protecting system for masking of 5,8-dihydroxy-1,4-naphthoquinones (naphthazarins) and a highly stereoselective ketone reduction.
Synthesis and antitumour activity of β-hydroxyisovalerylshikonin analogues
作者:Zhen Rao、Xin Liu、Wen Zhou、Jing Yi、Shao-Shun Li
DOI:10.1016/j.ejmech.2011.05.065
日期:2011.9
β-hydroxyisovalerylshikonin analogues bearing oxygen-containing substituents at the side-chain hydroxyl of shikonin were designed and synthesized. The cytotoxicities of these compounds were evaluated in vitro against multi-drug resistant (MDR) cell lines DU-145 and HeLa. Most compounds exhibited significant inhibitory activity on both cell lines. The structure–activity relationship showed the analogues with ether substituents