(R)-[(η5-C5H4PPh2)Re(NO)(PPh3)(CH2PPh2)] | 470666-08-1

• 英文名称: (R)-[(η5-C5H4PPh2)Re(NO)(PPh3)(CH2PPh2)]
• CAS: 470666-08-1
• 化学式: C₄₈H₄₁NOP₃Re
• 分子量: 926.988
• InChiKey: GRKSRPMWEQHURC-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  二(氰基苯)二氯化钯 、 (R)-[(η5-C5H4PPh2)Re(NO)(PPh3)(CH2PPh2)] 以 四氢呋喃 为溶剂， 以85%的产率得到(R)-[(η5-C5H4PPh2)Re(NO)(PPh3)(μ-CH2PPh2)PdCl2]
  参考文献：
  名称：

  Syntheses, Structures, and Catalytic Reactions of Palladium Adducts of Chiral Diphosphines That Contain a Rhenium Stereocenter in the Backbone

  摘要：

  Reactions of the title diphosphines [(eta(5)-C(5)H(4)Phh(2))Re(NO)(PPh3)((CH2)(n)PPh2)] (n = 0, (R)-1; n = 1, recemic or (S)-2) with [PdCl2(PhCN)(2)] give palladium/rhenium chelate complexes [(eta(5)-C5H4PPh2)Re(NO)(PPh3)((mu-CH2)(n)PPh2)PdCl2] (n = 0, (S)-5; n = 1, racemic or (S)-6) in 75-92% yield. The crystal structure of racemic 6 shows a twisted-boat conformation of the chelate ring, giving a chiral pocket very different from that in a related rhodium chelate. However, NOE experiments suggest a similar ensemble of conformations in solution. Catalysts are generated from various combinations of a) Pd(OAc)(2) and (R)-1 or (S)-2 (1:2), b) (S)-5 or (S)-6 and (R)-1 or (S)-2 (1:2), or c) (i-Bu)(2)AlH with the preceding recipes. These factors effect the Heck arylation of 2,3-dihydrofuran with phenyl trifluoromethylsulfonate. In contrast to analogous reactions with (R)-binap (=(R)-2,2'-bis(diplienylphosphanyl)-1,1'-binaphthalene), the major product 2-phenyl-2,3-dihydrofuran is nearly racemic (less than or equal to12% ee).

  DOI：

  10.1002/1522-2675(200206)85:6<1778::aid-hlca1778>3.0.co;2-9