trans-P,P-dichloridobis[5-diphenylphosphanyl-4(24),6(10),12(16),18(22)-tetramethylenedioxy-2,8,14,20-tetrapentylresorcin-[4]arene]palladium(II) | 1602896-76-3

• 英文名称: trans-P,P-dichloridobis[5-diphenylphosphanyl-4(24),6(10),12(16),18(22)-tetramethylenedioxy-2,8,14,20-tetrapentylresorcin-[4]arene]palladium(II)
• CAS: 1602896-76-3
• 化学式: C₁₂₈H₁₄₆Cl₂O₁₆P₂Pd
• 分子量: 2179.83
• InChiKey: GLVZTXKRZFVCGC-WKLFGMQUSA-L

反应信息

• 作为产物：
  描述：

  dichloro(cycloocta-1,5-diene)palladium (II) 、 5-diphenylphosphanyl-4(24),6(10),12(16),18(22)-tetramethylenedioxy-2,8,14,20-tetra-pentylresorcin[4]arene 以 二氯甲烷 为溶剂， 反应 0.5h， 以96%的产率得到trans-P,P-dichloridobis[5-diphenylphosphanyl-4(24),6(10),12(16),18(22)-tetramethylenedioxy-2,8,14,20-tetrapentylresorcin-[4]arene]palladium(II)
  参考文献：
  名称：

  Resorcinarenyl‐Phosphines in Suzuki–Miyaura Cross‐Coupling Reactions of Aryl Chlorides

  摘要：

  AbstractTwo phosphines built on a bowl‐shaped resorcin[4]arene skeleton, namely 5‐diphenylphosphanyl‐ and 5‐diisopropylphosphanyl‐4(24),6(10),12(16),18(22)‐tetramethylenedioxy‐2,8,14,20‐tetrapentylresorcin[4]arene, have been synthesised and tested in the Suzuki–Miyaura cross‐coupling reaction of aryl halides. Combining these ligands with [Pd(OAc)2] resulted in highly active catalysts that allowed the formation of o,o′‐biphenyls starting from aryl chlorides. The remarkable activities observed possibly arise from 1) the capacity of the phosphines to operate transiently as P,O chelators, thereby increasing the electron density of the metal, and 2) the ability of the ligands to embed metal–organic units, which, when occurring, makes the ligand considerably bulkier so as to disfavour the coordination of a second phosphine. Both features are known to facilitate the oxidative addition step.

  DOI：

  10.1002/ejic.201301473