Synthesis of 2-Substituted Benzofurans from o-Iodophenols and Terminal Alkynes with a Recyclable Palladium Catalyst Supported on Nano-sized Carbon Balls under Copper- and Ligand-Free Conditions
作者:Eul Kgun Yum、Ok-Kyung Yang、Ji-Eun Kim、Hee Jung Park
DOI:10.5012/bkcs.2013.34.9.2645
日期:2013.9.20
developed a one-step synthesis of benzofurans from o-iodophenol and various terminal alkynes, byusing Pd catalyst supported on nano-sized carbon balls (NCB) under copper- and ligand free conditions. Thisrecyclable catalyst could be reused more than 5 times in the same heteroannulation reaction. The results havedemonstrated that diverse 2-substituted benzofurans with tolerant functional groups can be prepared
E-mail: hjpark8659@kbsi.re.krReceived April 11, 2013 Accepted June 10, 2013我们开发了一种由邻碘苯酚和各种末端炔烃一步合成苯并呋喃的方法,采用纳米碳球负载钯催化剂( NCB) 在无铜和无配体条件下。这种可回收的催化剂可以在同一个异质环化反应中重复使用5次以上。结果表明,在这些条件下,可以简单方便地制备多种具有耐受官能团的2-取代苯并呋喃。关键词:苯并呋喃,纳米碳球,末端炔烃,可回收,钯催化剂环境友好和清洁的反应介质。在 Pd 催化过程中,已经报道了许多关于绿色技术的方法,例如开发可回收的钯催化剂和高效的反应方法。关于可回收的多相 Pd 催化剂,使用了多种载体。即聚合物,