Here is described a high yield synthesis of 3-substituted 4H-1,4-benzoxazines via palladium-catalysed coupling reactions between organostannanes and a vinylphosphate obtained from a benzoxazin-3-one derivative.
Stereoselective synthesis of highly functionalised P-stereogenic nucleosides via palladium-catalysed P–C cross-coupling reactions
✍ Scribed by Benjamin Whittaker; Manuel de Lera Ruiz; Christopher J. Hayes
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- French
- Weight
- 241 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
We have shown that the configuration at the P-stereogenic centre in a range of H-phosphonates can be assigned using a combination of chromatographic mobility, 1 H and 31 P NMR data. We have also shown that the individual P-stereoisomers can be cross-coupled with vinyl and aryl halides, in the presence of a palladium(0) catalyst, to afford the corresponding vinyl-and arylphosphonates in a stereocontrolled manner.
📜 SIMILAR VOLUMES
The rhodium catalysed C-H insertion reactions of o~-(triethylsilyl)diazoacetates have been studied, facilitating the stereoselective synthesis of t~-(triethylsilyl)-y-lactones. An intriguing 'and unprecedented inversion of stereoselectivity is observed upon changing from rhodium (It) carboxylates to