Fluorocyclization of 2‐Alkynylbenzoates: Synthesis of Fluorinated Isocoumarins by <i>N</i>‐Fluoropyridinium Salts
作者:Haruki Sakagami、Akira Tsubouchi、Akio Saito
DOI:10.1002/adsc.202301460
日期:2024.2.19
Fluorocyclization of heteroatom-centred nucleophile-tethered unsaturated compounds is one of the most powerful methods for the synthesis of fluorinated heterocycles. However, although these reactions have often been accomplished by using transition metal catalysts along with fluorine sources, such catalytic systems have not been applicable to the reaction of 2-alkynylbenzoates. Herein, we describe
以杂原子为中心的亲核试剂束缚的不饱和化合物的氟环化是合成氟化杂环的最有效的方法之一。然而,尽管这些反应通常通过使用过渡金属催化剂和氟源来完成,但此类催化体系尚未适用于2-炔基苯甲酸酯的反应。在此,我们描述了 N-氟吡啶鎓盐对 2-炔基苯甲酸酯的无金属氟环化。本方法允许通过对反应条件进行少量修改来选择性合成4-氟异香豆素和3,4,4-三氟异苯并二氢吡喃酮。该报告提供了合成氟化异香豆素的少数方法之一。