| Autor: |
Rufanov, K. A., Shevelyukhina, A. V. |
| Předmět: |
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| Zdroj: |
Russian Chemical Bulletin; Jun2023, Vol. 72 Issue 6, p1438-1453, 16p |
| Abstrakt: |
The synthesis of a series of new organophosphorane bis-ylide ligands is described. Upon their deprotonation, the stabilization of the ylide α-carbanion is achieved through the negative charge delocalization either over the π-system of the α-aryl groups bonded to carbanionic centers or over the {Cp}-type aromatic system in the case when the α-carbanion is involved in this system. The dibenzyl ylides [Ph2P(=CHAr)(CH2Ar)] were synthesized in situ starting from Ph2PLi and 2 equiv. of benzyl halides that significantly increased the yields of the target compounds. Ligands of the fluorenylidene, indenylidene, and cyclopentadienylidene types were synthesized in high yields. π-Stabilized organo-phosphorane ligands are readily metalated with potassium hydride and sodium amide to give the corresponding salts as solvates with THF. The reaction of 9-(diphenylphosphino)-fluorenide, Li[Ph2PC13H8], with Ph2PCl afforded the gem-bis(phosphine) ligand [9,9-(Ph2P)2C13H8] that readily gave the corresponding palladium complex [{κ-P, P-(Ph2P)2C13H8}PdCl2] in high yield. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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