Rhenium(I)-Catalyzed Cyclization of Silyl Enol Ethers Containing a Propargyl Carboxylate Moiety: Versatile Access to Highly Substituted Phenols
作者:Kodai Saito、Yuji Onizawa、Hiroyuki Kusama、Nobuharu Iwasawa
DOI:10.1002/chem.200903586
日期:2010.4.26
containing an acyloxy substituent at the propargylic position gave highly substituted phenols in good yields (see scheme). Depending on the structure of the silyl enol ether, either nucleophilic addition of this moiety or 1,2‐acyloxy migration occurs to give two kinds of synthetically useful, substituted phenols.
选择性迁移:在炔丙基位置含有酰氧基取代基的2-甲氧基-1-en-5-炔烃的rh催化反应可得到高取代度的苯酚,收率很高(参见方案)。取决于甲硅烷基烯醇醚的结构,该部分的亲核加成或1,2-酰氧基的迁移都会产生两种合成上有用的取代酚。