[(η6-cymene)RuCl((S)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)]Cl | 351885-40-0

• 英文名称: [(η6-cymene)RuCl((S)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)]Cl
• 英文别名: [CyRuCl(S)-BINAP]Cl
• CAS: 351885-40-0
• 化学式: C₅₅H₄₈ClP₂Ru*Cl
• 分子量: 942.91
• InChiKey: SQJPPEZPWAYNIP-UHFFFAOYSA-L

反应信息

• 作为反应物：
  描述：

  silver hexafluoroantimonate 、 [(η6-cymene)RuCl((S)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)]Cl 以 二氯甲烷 为溶剂， 生成 [(η6-cymene)RuCl((S)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)]SbF6
  参考文献：
  名称：

  An Application of Electronic Asymmetry to Highly Enantioselective Catalytic Diels−Alder Reactions

  摘要：

  The compounds (R-Ru)-[CyRuCl(S)-BINPO]SbF6 and [CyRuCl(S)-TolBINPO]SbF6 (Cy = eta (6)-cymene), were synthesized from (CyRuCl2)(2) and the appropriate non-C-2-symmetric bisphosphine monoxide ligands (S)-BINPO and (S)-TolBINPO (BINPO = 2,2 ' -bis(dipbenylphosphino)-1,1 ' -binaphthyl) in the presence of NaSbF6. When these complexes were mixed with AgSbF6 the resulting Lewis acids catalyzed the Diels-Alder cycloaddition of cyclopentadiene and methacrolein. The product, (2S)-methylbicyclo[2.2.1]hept-5-ene-2-carboxaldehyde was obtained with excellent diastereoselectivity (up to 99%) and enantioselectivity (up to 99%) in several cases. When the complexes containing the analogous C-2-symmetric bisphosphine;ligands (S)-BINAP and (S)-TolBINAP were employed as catalysts, the Diels-Alder cycloadducts were obtained with much lower enantioselectivity (19 to 50%) for the opposite antipode. Although some of the effect may arise from chelate ring size change, much of the enhanced stereoselectivity of (R-Ru)-[CyRuCl(S)-BINPO] SbF6 and [CyRuCl(S)-TolBINPO]SbF6 can be attributed to the electronic asymmetry at the stereogenic Ru center.

  DOI：

  10.1021/ja003528c