Synthetic Protocols Mutually Applicable to 4-Oxoquinolines and 4-Oxo-1,8-naphthyridines: Synthesis of 1-Aryl-2-substituted and 1-Aryl-3-fluoro-4-oxoquinolines and 4-Oxo-1,8-naphthyridines
作者:Ken-ichiro Awasaguchi、Hiromi Hayashi、Hyouei Kawai、Hiroko Tominaga、Yuichiro Sato、Kazuya Hayashi、Yozo Todo
DOI:10.1055/s-0031-1290079
日期:2012.2
We have achieved the synthesis of 1-aryl-2-substituted 4-oxoquinoline and 4-oxo-1,8-naphthyridine derivatives, which cannot be synthesized by known methods, via two useful synthons, 2-formyl-4-oxoquinoline and 2-methylsulfonyl-4-oxo-1,8-naphthyridine. We also succeeded in the synthesis of 1-aryl-3-fluoro-4-oxoquinoline by fluorocyclization of N-arylenaminone with Selectfluor® and potassium carbonate in DMF in a one-pot procedure. To the best of our knowledge, this is the first synthesis of 3-fluoro-4-oxoquinoline derivatives. We confirmed that these protocols were mutually applicable to the synthesis of 4-oxoquinoline and 4-oxo-1,8-naphthyridine derivatives.
我们已经通过两种有用的合成单元,2-醛基-4-氧喹啉和2-甲基磺酰基-4-氧-1,8-萘啶,成功合成了1-芳基-2取代的4-氧喹啉和4-氧-1,8-萘啶衍生物,这些化合物无法通过已知的方法合成。我们还通过在DMF中使用Selectfluor®和碳酸钾对N-芳基氨基酮进行氟化环化反应,成功合成了1-芳基-3-氟-4-氧喹啉,这是一锅法合成的。尽我们所知,这是3-氟-4-氧喹啉衍生物的首次合成。我们确认这些合成方案在4-氧喹啉和4-氧-1,8-萘啶衍生物的合成中具有相互适用性。