Mild reduction of chlorophosphine boranes to secondary phosphine boranes
β Scribed by Hubert Lam; David J. Aldous; King Kuok (Mimi) Hii
- Book ID
- 104253898
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 98 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
A number of reducing reagents were assessed in the transformation of chlorophosphine boranes to secondary phosphine boranes. The efficiency of the process requires judicious matching between steric and electronic requirements of reductant and the substrate. The stereochemistry of the reduction was investigated by using a chiral precursor.
π SIMILAR VOLUMES
The reactivity of primary phosphine-boranes RPH2'BH 3 (R = Ph and Me) towards CH2=CHCO2Me and CH2=CHP(O)(OMe)2 is discussed. Hydrophosphination is the major process. The presence of the free phosphine (0-20%) in the crude media indicates that a competitive hydroboration reaction also occurs. The P-H