Selective Fluorination of 4-Substituted 2-Aminopyridines and Pyridin-2(1<i>H</i>)-ones in Aqueous Solution
作者:Gang Zhou、Yawei Tian、Xiaoming Zhao、Wenyan Dan
DOI:10.1021/acs.orglett.8b02003
日期:2018.8.17
Fluorination of 2-aminopyridines and pyridin-2(1H)-ones in the presence of Selectfluor, water, and chloroform under mild conditions has been realized. This method gives fluorinated pyridines in good to high yields with high regioselectivities. The electron-deficient pyridine system is activated by an amino or hydroxyl group at C2. The regioselectivity of the fluorination reaction is strongly dependent
HETEROCYCLIC COMPOUND INTERMEDIATE, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
申请人:Wuhan LL Science And Technology
Development Co., Ltd.
公开号:EP3889154A1
公开(公告)日:2021-10-06
Disclosed by the invention is a heterocyclic compound, an intermediate, and a preparation method therefor and an application thereof. Provided by the invention are a heterocyclic compound as shown in formula I, and a stereoisomer, a geometric isomer, a tautomer, a nitrogen oxide, a hydrate, a solvate, a metabolite, an ester, a pharmaceutically acceptable salt or a prodrug thereof. The heterocyclic compound hasa high P2X3 antagonistic activity, and has good selectivity, low toxicity, good metabolic stability and little taste influence.
本发明公开了一种杂环化合物、一种中间体及其制备方法和应用。本发明提供了一种如式 I 所示的杂环化合物及其立体异构体、几何异构体、同分异构体、氧化氮、水合物、溶液、代谢物、酯、药学上可接受的盐或原药。该杂环化合物具有很高的 P2X3 拮抗活性,并且选择性好、毒性低、代谢稳定性好、味道影响小。
[EN] HETEROCYCLIC COMPOUND INTERMEDIATE, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF<br/>[FR] INTERMÉDIAIRE DE COMPOSÉ HÉTÉROCYCLIQUE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 杂环类化合物、中间体、其制备方法及应用