Decarboxylative Fluorination of Electron-Rich Heteroaromatic Carboxylic Acids with Selectfluor
作者:Xi Yuan、Jian-Fei Yao、Zhen-Yu Tang
DOI:10.1021/acs.orglett.7b00335
日期:2017.3.17
A transition-metal-free decarboxylative fluorination of electron-rich five-membered heteroaromatics, including furan-, pyrazole-, isoxazole-, thiophene-, indole-, benzofuran- and indazolecarboxylic acids, with Selectfluor is reported. Fluorinated dimer products were observed for nitrogen-containing heteroaromatic carboxylic acids, such as indole and pyrazole. An effective method has been developed
富电子的五元杂芳族化合物(包括呋喃,吡唑,异恶唑,噻吩,吲哚,苯并呋喃和吲唑羧酸)与Selectfluor的无过渡金属脱羧氟化反应得到了报道。观察到氟化二聚体产物中含氮杂芳族羧酸,例如吲哚和吡唑。已经开发出有效的方法,以在低温下以Li 2 CO 3为碱合成2-和3-氟吲哚的单体。