Ligand assisted palladium catalyzed one-pot tandem Heck alkynylation/cyclization reactions for the synthesis of benzofurans was reported in this paper. Well-defined palladium-pincer complexes exhibited excellent catalytic activities for the one-pot tandem Heck alkynylation/cyclization reactions yielding benzofuran derivatives using 0.1 mol% catalyst. All the catalytic reactions are performed in air. The effects of variables such as solvents, the temperature on the catalytic activity are also reported. High product conversion was obtained for differently substituted 2-iodophenol at 120 °C in 10 h.

中文翻译：

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双（吡咯基）吡啶基钯钳复合物催化一锅串联Heck烷基化/环化反应

本文报道了配体辅助钯催化的一锅串联Heck烷基化/环化反应合成苯并呋喃。定义明确的钯-夹杂物配合物对一锅式串联Heck烷基化/环化反应显示出优异的催化活性，使用0.1摩尔％的催化剂生成苯并呋喃衍生物。所有催化反应均在空气中进行。还报道了变量例如溶剂，温度对催化活性的影响。在120°C下，在10小时内获得了不同取代的2-碘苯酚的高产物转化率。