Nucleophilic Aromatic Substitution of Hydrogen Through Lithiated Phosphine Borane Complexes and N-Phosphorylphosphazenes.
β Scribed by Carmen M. Andujar Sanchez; Ma. Jose Iglesias; Isidro J. Perez Alvarez; Fernando Lopez Ortiz
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 115 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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The title reaction leads to diastereomeric lithium carbanion acylation with acid chlorides, stannylation, and silylation take place at the Ξ±-position with stereoinversion (79-86% pairs that are configurationally unstable and equilibrate even at temperatures below -50 Β°C. The initially formed epimer