Cu(I) Catalyst in DMF: An Efficient Catalytic System for the Synthesis of Furans from 2-(1-Alkynyl)-2-alken-1-ones
作者:Nitin T. Patil、Huanyou Wu、Yoshinori Yamamoto
DOI:10.1021/jo050191u
日期:2005.5.1
The cyclization of 2-(1-alkynyl)-2-alken-1-ones 1 proceeded very smoothly in the presence of alcohols 2 with a catalytic amount of Cu(I)Br in DMF at 80 °C, leading to the formation of highly substituted furans 3. The catalytic system reported herein is easy to handle, compared to the previously known system wherein the reaction between 1 and 2 needed to use moisture sensitive gold(III) chloride.
2-(1-炔基)的环化-2-链烯-1-酮1在醇的存在下很顺利进行2与在80℃下的Cu(I)溴在DMF催化量,导致形成高度取代的呋喃3。与先前已知的其中使用湿敏氯化金(III)需要1和2之间的反应的系统相比,本文报道的催化系统易于处理。