Unexpected conversion of echinochrome to brominated spinochrome D. Synthesis of 2-amino-3,6,7-trihydroxynaphthazarin produced by the sea urchins Strongylocentrotus nudus and Psammechinus miliaris
作者:Galina I. Melman、Ksenia L. Borisova、Nataly D. Pokhilo、Vyacheslav V. Makhankov、Victor Ph. Anufriev
DOI:10.1016/j.tetlet.2016.01.004
日期:2016.2
Two approaches to the total synthesis of 2-amino-3,6,7-trihydroxynaphthazarin, a metabolite of the sea urchins Strongylocentrotus nudus and Psammechinus miliaris are described. The first was based on the conversion of 2,3-dichloro-6,7-dimethoxynaphthazarin into the corresponding 3-hydroxy-2-nitro derivative and subsequent reduction to give 2-amino-3-hydroxy-6,7-dimethoxynaphthazarin. The basis for
描述了两种全合成2-氨基-3,6,7-三羟基萘他沙林的方法,这是海胆Strongylocentrotus nudus和Psammechinus miliaris的代谢产物。第一种是基于将2,3-二氯-6,7-二甲氧基萘他沙林转化为相应的3-羟基-2-硝基衍生物,然后还原得到2-氨基-3-羟基-6,7-二甲氧基萘他沙林。第二种方法的基础是将棘皮动物色素转化为溴化多刺色素D,并通过叠氮基直接取代溴原子引入氨基。