Synthesis and X-ray Crystal Structure Analysis of a Cp-Substituted Phosphaferrocene
Résumé
At 140 °C in THF, a 2,3,4,5-tetramethyl-1- cyclopentadienylide anionic substituent migrates from phosphorus to the R-carbon of the corresponding Psubstituted 3,4-dimethylphosphole 2. The resulting 2-cyclopentadienyl- 3,4-dimethylphospholide ion (3) reacts with a [CpFe]+ source to give the corresponding 2-cyclopentadienyl- 3,4-dimethyl-1-phosphaferrocene (5) as a mixture of two diastereomers, one of which has been characterized by X-ray crystal structure analysis.