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https://doi.org/10.1016/S0022-328X(01)01074-9
Title: | Palladium(II) ion promoted hydroamination of di(phenylethynyl)phenylphosphine and aniline: A facile synthesis of a six-membered P-N heterocycle | Authors: | Liu, X. Ong, T.K.W. Selvaratnam, S. Vittal, J.J. White, A.J.P. Williams, D.J. Leung, P.-H. |
Keywords: | Acid hydrolysis Azaphospha heterocycle Crystal structures Hydroamination reaction Imino-phosphine Phosphinoalkyne |
Issue Date: | 1-Feb-2002 | Citation: | Liu, X., Ong, T.K.W., Selvaratnam, S., Vittal, J.J., White, A.J.P., Williams, D.J., Leung, P.-H. (2002-02-01). Palladium(II) ion promoted hydroamination of di(phenylethynyl)phenylphosphine and aniline: A facile synthesis of a six-membered P-N heterocycle. Journal of Organometalic Chemistry 643-644 : 4-11. ScholarBank@NUS Repository. https://doi.org/10.1016/S0022-328X(01)01074-9 | Abstract: | The six-membered aromatic heterocycle 1,4-2H-1,2,4,6-tetraphenyl-1,4-azaphosphabenzene was generated efficiently via a [PdCl2(NCMe)2] promoted hydroamination between PhP(C=CPh)2 and aniline. The heterocyclization reaction adopts a stepwise mechanism during which the unstable intermediate imino complex cis-dichloro {1,2-diphenyl-3-phenyl(phenylethynyl)phosphino-1-aza-1-propene} palladium(II) is formed. The end product of the cyclization reaction is a palladium complex in which the six-membered aromatic P-N heterocyclic ring is coordinated to the metal center as a typical monodentate ligand via phosphorus. The azaphospha heterocycle can subsequently be liberated from the palladium reaction activator as an air-stable yellow solid by treating the palladium complex with KCN. In contrast to the intermediate imino-complex, where the C=N is readily hydrolyzed by HCl, the aromatic heterocycle is stable in strongly acidic environments. © 2002 Elsevier Science B.V. All rights reserved. | Source Title: | Journal of Organometalic Chemistry | URI: | http://scholarbank.nus.edu.sg/handle/10635/113203 | ISSN: | 0022328X | DOI: | 10.1016/S0022-328X(01)01074-9 |
Appears in Collections: | Staff Publications |
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