A new synthesis of unsymmetrical conjugated diynes
โ Scribed by Andrew Pelter; Rosemary Hughes; Keith Smith; Masayoshi Tabata
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 148 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0040-4039
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๐ SIMILAR VOLUMES
## Abstract Chiral, racemic alkylarylโ, or diarylhalophosphines have been obtained in 50โ70% yields by treatment of alkylarylโ or diarylโmethylthiohalophosphonium triflates with triphenylphosphine in methylene chloride solution at room temperature or under reflux.
An improved synthetic approach to conjugated monodendrons with unsymmetrical branching structures is reported. Dendrimers containing two or three such conjugated monodendrons are synthesized and their optical properties are studied. Such dendrimers exhibit broad absorptions and very high fluorescenc