Synthesis of 9-Alkylidene-9<i>H</i>-fluorenes by a Novel, Palladium-Catalyzed Cascade Reaction of Aryl Halides and 1-Aryl-1-alkynes
作者:Richard C. Larock、Qingping Tian
DOI:10.1021/jo010561o
日期:2001.11.1
In the presence of a palladium catalyst and NaOAc, aryl iodides react with 1-aryl-1-alkynes to afford 9-alkylidene-9H-fluorenes in good yields. The products from this reaction are highly dependent on the base employed. 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
The Solvent Effect on the Reaction of 1,1,4,4-Tetraphenyl-2-halobuta-2,3-dien-1-ol with Mercuric Halide
作者:Fumio Toda、Nobuhiro Ooi、Katsuhiko Akagi
DOI:10.1246/bcsj.44.1050
日期:1971.4
The reaction of the title compound (I) with mercuric halide in an aprotic and in a protic solvent afforded the fulvene derivative (VII) and the dihydrofuran derivative (VIII or IX) respectively. Both the cross-reactions (bromo-analog of I (Ia)+HgCl2, chloro-analog of I (Ib)+HgBr2) in an aprotic solvent afforded the chloro-fulvene derivative (VIIb). However, when the above reactions were carried out