As electron-rich partners, they act as 4π phosphadienic systems toward alkenes and alkynes in [4 + 2] cycloaddition reactions. As electron-poor partners, they act either as 2π systems toward conjugated dienes in [2 + 4] cycloaddition reactions via their P═C double bond or as 6π systems toward phosphadienes in [6 + 4] cycloaddition reactions.
FeCl<sub>2</sub> Catalyzed Three-Component Reactions of Phospholes, Pyrrolidine, and Ketones (Aldehydes): Chemoselective Synthesis of 1-Phosphafulvenes
We have developed an unprecedented approach for the synthesis of transient 1-phosphafulvenes through three component reactions of phospholes. The generation of 1-phosphafulvenes was demonstrated by in situ [6 + 4] cycloaddition with 2H-phospholes and [6 + 6] self-dimerization. The [6 + 4] and [6 + 6] reaction pathway could be modulated by the starting ketones and aldehydes. The construction of 1-phosphafulvenes
Phospholes react with aldimines at 170 degrees C in the presence of mild Lewis acids to give C-2-bridged biphospholes in good yields: The mechanism includes a series of [1,5] shifts of the P-substituents around the phosphole ring, a P-H + aldimine condensation, and the formation of a transient three-membered ring that dimerizes.
A Novel Family of Phosphole-Thiophene Oligomers for Optoelectronic Applications
作者:Ngoc Hoa Tran Huy、Bruno Donnadieu、François Mathey、Astrid Muller、Kathryn Colby、Christopher J. Bardeen
DOI:10.1021/om800644m
日期:2008.11.10
A 2-terthienylphospholide can be prepared from a 1-terthienylphosphole by reaction with tBuOK in diglyme at 150 degrees C. This phospholide is then transformed into the corresponding 1-methyl-2-terthienylphosphole-borane. This borane complex fluoresces at 5 10 nm in CH2Cl2 with a quantum yield of 0.17. The excited-state displays a significant charge transfer between the terthienyl substituent and the phosphole ring as shown by the shift of the emission to lower energies upon increasing the polarity of the solvent.
Bevierre, M. O.; Mercier, F.; Ricard, L., Bulletin de la Societe Chimique de France, 1992, # 1, p. 1 - 8
作者:Bevierre, M. O.、Mercier, F.、Ricard, L.、Mathey, F.