Impurity compound A in novel crown therapeutic drug palovirin as well as preparation method and application of impurity compound A

The invention provides an impurity compound A in a novel crown therapeutic drug palovirin as well as a preparation method and application of the impurity compound A. The impurity compound A can be used as a standard substance to control and research the quality of palovirin drugs. The invention also provides a preparation method of the impurity compound A. The preparation method has the advantages of short reaction route, mild conditions and high yield and purity. 本发明提供一种新冠治疗药物帕罗韦德中的杂质化合物A及其制备方法以及应用。该杂质化合物A可作为标准品使用，对帕罗韦德的药品质量进行控制研究。本发明还提供杂质化合物A的制备方法，该制备方法具有反应路线简短、条件温和、产率和纯度高的优点。