In developing new approaches to the use of stable transition metal-carbene complexes in organic synthesis, we have focused our attention of the M&+ ylide nature of the metal-carbene bond and on the susceptibility of the electron deficient carbene carbon atom to nucleophilic attack.' In this regard,
A new synthesis of spiroacetals via alkylidenation of ester carbonyls with metal carbene complexes
✍ Scribed by Michael Mortimore; Philip Kocieński
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 261 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
The condensation reaction between y-unsubstituted pyrylium salts and carbanions of Fischertype cmbcne complexes allowed the synthesis of new y -methylenepyran carbene complexes. 13C NMR data and single cristal X-ray analysis suggest a delocalisation of the oxygene lone pair of the heterocycle.
**Surprising reactions of carbon monoxide with transition metal complexes** have been observed with compounds __(1)__ and __(2)__. The carbyne complex __(1)__ takes up CO at normal pressure and −30°C to form the metalated ketene __(2)__ which itself is deoxygenated by CO at +60°C and under 60atm pre