Gold-catalyzed synthesis of 1,3-disubstituted benzenes through tandem allylation/cyclization reaction of alkynals
作者:Sabyasachi Bhunia、Shariar Md. Abu Sohel、Chao-Chin Yang、Shie-Fu Lush、Fwu-Ming Shen、Rai-Shung Liu
DOI:10.1016/j.jorganchem.2008.10.049
日期:2009.2
Treatment of alkynals with 2-substituted allylsilanes and PPh3AuCl/AgOTf (5/3 mol%) catalyst led to formation of 1,3-disubstituted benzenes efficiently. This reaction sequence comprises an initial allylation of aldehyde, followed by cycloisomerization of enynes; PPh3AuOTf is active in both steps.
用2-取代的烯丙基硅烷和PPh 3 AuCl / AgOTf(5/3 mol%)催化剂处理炔烃可有效地形成1,3-二取代的苯。该反应顺序包括醛的初始烯丙基化,然后是烯炔的环异构化。PPh 3 AuOTf在两个步骤中均处于活动状态。