作者:Emily Hollink、Jeffrey C. Stewart、Pingrong Wei、Douglas W. Stephan
DOI:10.1039/b308114a
日期:——
The diphosphines m-C6H4(CH2Pt-Bu2)21 and m-C6H4(CH2PCy2)22 were prepared and oxidized with Me3SiN3 to m-C6H4(CH2(t-Bu2)PNSiMe3)23 and m-C6H4(CH2(Cy2)PNSiMe3)24, and subsequently converted to m-C6H4(CH2(t-Bu)2PNH)25 and m-C6H4(CH2(Cy)2PNH)26. Reaction of 5 and 6 with Ti(NMe2)4 afforded the yellow compounds m-C6H4(CH2(t-Bu)2PN)2Ti(NMe2)27 and m-C6H4(CH2(Cy)2PN)2Ti(NMe2)28, and the low abundance by-product m-C6H4(CH2(t-Bu)2PN)2TiBr(NMe2)
9. In a similar manner, the species m-C6H4(CH2(t-Bu)2PN)2Zr(NEt2)210 was prepared from Zr(NEt2)4. Compounds 8, 9 and 10 were converted to C6H4(CH2(t-Bu)2PN)2TiBr211, m-C6H4(CH2(Cy)2PN)2TiCl213 and C6H4(CH2(t-Bu)2PN)2ZrCl214via reaction with Me3SiX (X = Br, Cl). Alternatively, m-C6H4(CH2(t-Bu)2PN)2TiCl212 and 13 were prepared in low yield from reaction of 3 or 4 with TiCl4. Alkylation of 11 with MeMgBr and PhCH2MgBr proceeded to give m-C6H4(CH2(t-Bu)2PN)2TiMe215 and m-C6H4(CH2(t-Bu)2PN)2Ti(CH2Ph)216, respectively. The species (m-C6H4(CH2(t-Bu)2PN)2)2Zr 17 was prepared from Zr(CH2Ph)4. These synthetic routes are described and the implications for applications in olefin polymerization catalysis are considered. X-Ray structural data for compounds 1, 3, 4, 5, 8, 9 and 16 are reported.
合二膦化合物 m-C6H4(CH2Pt-Bu2)21 和 m-C6H4(CH2PCy2)22 被合成并用 Me3SiN3 氧化成 m-C6H4(CH2(t-Bu2)PNSiMe3)23 和 m-C6H4(CH2(Cy2)PNSiMe3)24,随后转化为 m-C6H4(CH2(t-Bu)2PNH)25 和 m-C6H4(CH2(Cy)2PNH)26。化合物 5 和 6 与 Ti(NMe2)4 反应生成黄色化合物 m-C6H4(CH2(t-Bu)2PN)2Ti(NMe2)27 和 m-C6H4(CH2(Cy)2PN)2Ti(NMe2)28,以及少量副产物 m-C6H4(CH2(t-Bu)2PN)2TiBr(NMe2)9。以类似方法,从 Zr(NEt2)4 制备出物种 m-C6H4(CH2(t-Bu)2PN)2Zr(NEt2)210。化合物 8、9 和 10 通过与 Me3SiX (X = Br, Cl) 反应转化为 C6H4(CH2(t-Bu)2PN)2TiBr211、m-C6H4(CH2(Cy)2PN)2TiCl213 和 C6H4(CH2(t-Bu)2PN)2ZrCl214。或者,m-C6H4(CH2(t-Bu)2PN)2TiCl212 和 13 是通过化合物 3 或 4 与 TiCl4 的反应获得的低产率化合物。化合物 11 与 MeMgBr 和 PhCH2MgBr 的烷基化反应分别生成 m-C6H4(CH2(t-Bu)2PN)2TiMe215 和 m-C6H4(CH2(t-Bu)2PN)2Ti(CH2Ph)216。物种 (m-C6H4(CH2(t-Bu)2PN)2)2Zr 17 是从 Zr(CH2Ph)4 制备的。这些合成路线被描述,并考虑了在烯烃聚合催化应用中的意义。报告了化合物 1、3、4、5、8、9 和 16 的 X 射线结构数据。