example of a gold‐catalyzed intermolecular addition of carbon ylides to terminal alkynes is reported (see scheme; DCE=dichloroethane, Tf=trifluoromethanesulfonyl). Subsequent intramolecular trapping of the generated gold carbene completes a formal [3+2] cycloaddition, which represents a novel synthesis of 2,4‐disubstituted furans.
黄
金的
呋喃:报道了第一个
金碳分子间加成碳烷基化物到末端
炔烃的例子(见方案; DCE =
二氯乙烷,Tf =三
氟甲磺酰基)。随后生成的
金卡宾的分子内捕集完成了正式的[3 + 2]环加成反应,这代表了2,4-二取代
呋喃的新型合成。