| Autor: |
Yang Qin, Frieder Jäkle, and Anand Sundararaman, Guanglou Cheng |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Journal of the American Chemical Society. 124(43) |
| ISSN: |
0002-7863 |
| Popis: |
A general new route to well-defined polymeric Lewis acids via borylation of silylated polymers is reported. Trimethylsilylated polystyrene (PS-Si) of controlled molecular weight and low polydispersity (PDI < 1.15) was obtained via atom transfer radical polymerization (ATRP) of 4-(trimethylsilyl)styrene. The functional polymer PS-Si was quantitatively borylated using BBr3 to give poly(4-dibromoborylstyrene) (PS-B), a novel soluble boron-containing polymeric Lewis acid. PS-B readily reacted with nucleophiles serving as a precursor to a family of new polymers with boron centers of variable Lewis acidity. Reaction of PS-B with Cu(C6F5) gave the highly Lewis acidic polymer poly[4-bis(pentafluorophenyl)borylstyrene], the first polymeric analogue of tris(pentafluorophenyl)borane. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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