Synthesis of 9-Alkylidene-9<i>H</i>-fluorenes by a Novel Palladium-Catalyzed Rearrangement
作者:Qingping Tian、Richard C. Larock
DOI:10.1021/ol000220h
日期:2000.10.1
iodides react with 1-aryl-1-alkynes to afford 9-alkylidene-9H-fluorenes in good yields. This process appears to involve (1) oxidative addition of the aryl iodide to Pd(0), (2) alkyne insertion, (3) rearrangement of the resulting vinylic palladium intermediate to an arylpalladium species, and (4) aryl-aryl coupling with simultaneous regeneration of the Pd(0) catalyst.
在钯催化剂和NaOAc的存在下,芳基碘化物与1-芳基-1-炔烃反应以高收率得到9-亚烷基-9H-芴。该过程似乎涉及(1)将芳基碘化物氧化加成至Pd(0),(2)炔烃插入,(3)将所得乙烯基钯中间体重排为芳基钯物质和(4)芳基-芳基与同时再生Pd(0)催化剂。