A first regioselective synthesis of 3-fluoroalkylated benzofurans via palladium-catalyzed annulation of fluorine-containing internal alkynes with variously substituted 2-iodophenol
作者:Tsutomu Konno、Jungha Chae、Takashi Ishihara、Hiroki Yamanaka
DOI:10.1016/j.tet.2004.10.005
日期:2004.12
The palladium-catalyzed annulation reaction of a variety of fluorine-containing internal alkynes with 2-iodophenol derivatives was investigated. The use of P(t-Bu)3 as a ligand on palladium was found to be crucial in this annulation reaction, resulting in the exclusive formation of 3-fluoroalkylated benzofurans in high yields. 19F NMR analysis of the reaction mixture revealed that the addition of phenol
研究了各种含氟内炔与2-碘苯酚衍生物的钯催化的环化反应。已发现使用P(t- Bu)3作为钯上的配体在该环化反应中至关重要,从而导致以高收率独家形成3-氟烷基化的苯并呋喃。反应混合物的19 F NMR分析表明,将苯酚加入到氟代烷基化的炔烃中,随后进行分子内Heck反应,得到相应的3-氟代烷基化的苯并呋喃。