申请人:THR REGENTS OF THE UNIVERSITY OF CALIFORNIA
公开号:US20160185723A1
公开(公告)日:2016-06-30
The present invention provides compositions and methods for the selective C—H fluorination of nitrogen-containing heteroarenes with AgF
2
, which has previously been considered too reactive for practical, selective C—H fluorination. Fluorinated heteroarenes are prevalent in numerous pharmaceuticals, agrochemicals and materials. However, the reactions used to introduce fluorine into these molecules require pre-functionalized substrates or the use of F
2
gas. The present invention provides a mild and general method for the C—H fluorination of nitrogen-containing heteroarene compounds to 2-fluoro-heteroarenes with commercially available AgF
2
. In various embodiments, these reactions occur at ambient temperature within one hour and occur with exclusive selectivity for fluorination at the 2-position. Exemplary reaction conditions are effective for fluorinating diazine heteroarenes to form a single fluorinated isomer.
本发明提供了使用AgF2对含氮杂环进行选择性C-H氟化的组合物和方法,这在以前被认为过于反应活泼而不适用于实际的选择性C-H氟化。氟代杂环在许多药物、农药和材料中广泛存在。然而,用于将氟引入这些分子的反应需要预功能化的底物或使用F2气体。本发明提供了一种轻柔且通用的方法,用于使用商业上可获得的AgF2对含氮杂环化合物进行C-H氟化,以形成2-氟杂环。在各种实施例中,这些反应在一个小时内在室温下发生,并且仅在2位进行氟化的选择性非常高。示例反应条件对于氟化二氮杂环以形成单个氟代异构体是有效的。