Palladium-Catalyzed Suzuki Coupling with Terminal Alkynes - Application to the Synthesis of 2,3-Disubstituted Benzo[b]furans
作者:Françoise Colobert、Anne-Sophie Castanet、Olivier Abillard
DOI:10.1002/ejoc.200500166
日期:2005.8
The Suzuki coupling reaction between alkynylboronic esters (generated in situ from acetylenic derivatives) and aryl bromides, pyridyl bromides or vinyl bromides is reported. 5-endo-dig-iodocyclisation of o-alkynylanisoles, generated by this palladium-catalyzed Suzuki coupling reaction, was performed with N-iodosuccinimide (NIS) in the presence of BCl3. 2-Substituted 3-iodobenzo[b]furans were synthesized
报道了炔基硼酸酯(由炔属衍生物原位生成)与芳基溴化物、吡啶基溴化物或乙烯基溴化物之间的 Suzuki 偶联反应。在 BCl3 存在下,使用 N-碘代琥珀酰亚胺 (NIS) 进行由这种钯催化的 Suzuki 偶联反应生成的邻炔基苯甲醚的 5-endo-dig-iodocyclisation。合成了 2-取代的 3-碘苯并 [b] 呋喃,并通过 Suzuki 偶联反应以高产率转化为 2,3-二取代的苯并 [b] 呋喃。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)