| 915218-10-9

• CAS: 915218-10-9
• 化学式: C₂₇H₅₃ClN₂P₄Ru
• 分子量: 666.149
• InChiKey: BBGLAMVXNLIOGF-UHFFFAOYSA-M

反应信息

• 作为产物：
  描述：

  、 三甲基膦 以 氘代苯 为溶剂， 生成 、 、
  参考文献：
  名称：

  Double C−H Activation Results in Ruthenium Complexes of a Neutral PCP Ligand with a Central Carbene Moiety

  摘要：

  Ru complexes of a new neutral PCP pincer ligand containing a central carbene ligand have been prepared (referred to as (P2C=) for emphasis). The ligand precursor P2CH2 can be prepared in good yield in two steps from pyrrole, formaldehyde, and chlorodiisopropylphosphine. The reaction between P2CH2 and [(p-cymene)RuCl2](2) in the presence of Et3N cleanly furnishes (P2C=) RuHCl. The latter possesses a Y-shaped five-coordinate geometry about Ru, as determined in an X-ray diffraction study. Reactions of (P2C=) RuHCl with a series of potential ligands have been examined. Addition of pyridine, MeCN, or ethylene leads to a simple adduct formation and addition of CO leads to coordination of two CO ligands to Ru with concomitant hydride-to-carbene migration, while addition of PMe3 gives rise to both types of products. (P2C=) RuHCl is a moderately active precatalyst for transfer hydrogenation of ketones. Addition of phenylacetylene leads to the insertion of the triple bond into Ru-H to give (P2C=)Ru(-CPh=CH2)Cl. (P2C=) RuHCl can be converted to (P2C=) RuCl2 by action of an iminium chloride reagent. (P2C=) RuCl2 adds one molecule of CO with retention of the carbene moiety, even at elevated temperatures. These results demonstrate the potential of (P2C=) as a robust and electronically distinctive ancillary ligand.

  DOI：

  10.1021/om060464r