Darstellung von trans-4-Diphenylphosphinyl-stilbenen
✍ Scribed by Dr. D. Gloyna; Dipl.-chem. L. Alder; Prof. Dr. H.-G. Henning; Dr. H. Köppel; Dr. M. Siegmund; Prof. Dr. K.-D. Schleinitz
- Book ID
- 105352120
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 633 KB
- Volume
- 322
- Category
- Article
- ISSN
- 1615-4150
No coin nor oath required. For personal study only.
✦ Synopsis
Synthesis of trans‐4‐Diphenylphosphinyl Stilbenes
The reaction of 4‐tolyl‐diphenylphosphine oxide with N‐bromosuccinimide results in 4‐diphenylphosphinyl benzylbromide 5 which can be easily converted to (4‐diphenylphosphinyl)‐benzyl triphenylphosphonium bromide 6 and (4‐diphenylphosphinyl)‐benzyl diphenylphosphine oxide 7, respectively. In the presence of strong bases 6 and 7 react with aromatic aldehydes 8 to the 4‐diphenylphosphinyl substituted stilbenes 1. The yields depend on the nature of base and solvent. The trans configuration of 1 is determined by i.r. and ^1^H‐n.m.r. measurements.
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