A simple and convenient synthetic approach to difurylmethane derivatives has been developed via gold-catalyzed cycloisomerization of 1-oxiranyl-2-alkynyl esters and dimerization of the 2-(α-hydroxyalkyl)furans. The reaction takes place in the presence of 2 mol% of tetrachloroauric acid tetrahydrate (HAuCl4⋅4 H2O) under very mild conditions.
通过
金催化的1-
环氧乙烷基-2-炔基酯的环异构化和2-(α-羟烷基)
呋喃的二聚化,已经开发了一种简单且方便的合成二
呋喃甲烷衍
生物的方法。该反应发生于
四氯金酸四水合物(的HAuCl的2%(摩尔)的存在下4 ⋅4ħ 2 O)下非常温和的条件。