A New Route to Cationic Half‐Sandwich Ruthenium(
<scp>II</scp>
) Complexes with Chiral Cyclopentadienylphosphane Ligands
作者:Angelino Doppiu、Albrecht Salzer
DOI:10.1002/ejic.200300934
日期:2004.6
Optically active cyclopentadienyl-linked phosphane ligands Ln of general formula C5H5CH2CH(R)PR′2 (R = Ph, R′ = Ph, L1; R = Ph, R′ = Cy, L2; R = mesityl, R′ = Ph, L3) and C5H5CH(R)CH2PPh2 (R = Cy, L4; R = Bzl, L5) are synthesised by ring-opening reactions of 1-R-spiro[2.4]hepta-4,6-dienes (R = Ph, Cy, mesityl, benzyl), with lithium phosphides LiPR′2 (Ar = Ph, Cy). Reaction of the ligands Ln with [
通式 C5H5CH2CH(R)PR'2 的光学活性环戊二烯基连接的磷烷配体 Ln (R = Ph, R' = Ph, L1; R = Ph, R' = Cy, L2; R = mesityl, R' = Ph, L3) 和 C5H5CH(R)CH2PPh2 (R = Cy, L4; R = Bzl, L5) 是通过 1-R-spiro[2.4]hepta-4,6-diene (R = Ph, Cy , 甲基, 苄基), 与磷化锂 LiPR'2 (Ar = Ph, Cy)。配体Ln与[RuH(η5-C7H11)2][BF4]在乙腈中回流反应得到双(乙腈)钌(II)配合物[Ru(η5-C5H4(C2H3R)PR'2-κP)(CH3CN) )2][BF4],其中配体通过环戊二烯基和磷烷部分与金属配位,形成螯合物,产量几乎是定量的。这些配合物是香叶醇氧化还原异构化的活性催化剂,可提供手性香茅醛,但对映选择性较低。它们还催化