Selective synthesis of pyridyl pyridones and oxydipyridines by transition-metal-free hydroxylation and arylation of 2-fluoropyridine derivatives
作者:Chunshu Liao、Jianrong Li、Xiaoqiong Chen、Jingjun Lu、Qiang Liu、Lu Chen、Yubing Huang、Yibiao Li
DOI:10.1039/c9ob02661d
日期:——
An efficient protocol for the construction of various pyridyl pyridone and oxydipyridine derivatives through a hydroxylation and arylation tandem reaction of 2-fluoropyridines is reported. Under simple transition-metal-free conditions, the reaction provided a series of products in good to excellent yields, and their structures were confirmed by crystal diffraction analysis. Furthermore, the controlling
The present invention relates to novel imaging probes and methods for using the probes in diagnostic imaging processes and other imaging processes to determine physiological functions.
本发明涉及新型成像探针以及使用这些探针在诊断成像过程和其他成像过程中确定生理功能的方法。
Novel imaging probes
申请人:——
公开号:US20030198599A1
公开(公告)日:2003-10-23
The present invention relates to fluorinated and paramagnetic polyuronides (Formulas I-IV) and proteins useful as imaging probes, diagnostic agents and contrast agents. Additionally, the present invention relates to imaging methods employing the present compounds of Formulas I-IV.
The present invention relates to fluorinated biopolymer and polymer derivatives useful as imaging probes, diagnostic agents and contrast agents and to imaging methods employing the fluorinated biopolymers and polymers.
Halogenated emulsans are prepared by a fermentation process where a microorganism capable of making emulsans is grown (cultured) in an effective emulsan producing culture medium with a suitable carbon source and halogenated compounds that are assimilated by the microorganism and incorporated into the emulsan molecule made by the microorganism. The emulsans are secreted into the culture medium and isolated therefrom. A preferred microorganism is a bacterium from the genus Actinobacter and preferred halogenated compounds include fluorinated compounds such as fluorinated fatty acids and fluorinated fatty acid esters.