Zirconacyclopropanes and Zirconacyclopropenes. Their Synthesis, Characterization, and Reactions
作者:Tamotsu Takahashi、Douglas R. Swanson、Ei-ichi Negishi
DOI:10.1246/cl.1987.623
日期:1987.4.5
Zirconacyclopropenes represented by Cp2Zr(PhCCPh) (PR3) (4), where PR3 is PMe3 or PMePh2, have been prepared by the reaction of Cp2Zr(PR3)2 with PhC≡CPh, isolated as yellowish crystals, and spectroscopically characterized. Zirconacyclopropenes readily react with proton donors, carbonyl compounds, e.g., acetone, and alkynes to induce dimerization of alkynes and are likely intermediates in the ZrCp2-induced bicyclization of enynes.
以 Cp2Zr(PhCCPh) (PR3) (4) 为代表的氧化锆环丙烯,其中 PR3 是 PMe3 或 PMePh2,是通过 Cp2Zr(PR3)2 与 PhC≡CPh 的反应制备的,分离为淡黄色晶体,并进行了光谱表征。氧化锆环丙烯很容易与质子供体、羰基化合物(例如丙酮)和炔烃反应,诱导炔烃二聚,并且可能是 ZrCp2 诱导的烯炔双环化的中间体。