Amatore, C. and Jutand, A. and Meyer, G. and Atmani, H. and Khalil, F. and Chahdi, F.O. (1998) Comparative reactivity of palladium(0) complexes generated in situ in mixtures of triphenylphosphine or tri-2-furylphosphine and Pd(dba)2. Organometallics, 17 (14). pp. 2958-2964.

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Abstract

For PPh3, mixtures of Pd(dba)2 and nTFP (TFP = tri-2-furylphosphine, n ≥ 2) in DMF and THF (S) lead to the formation of Pd(dba)(TFP)2, SPd(TFP)3 in equilibrium with SPd-(TFP)2. The substitution of dba by the phosphine in Pd(dba)L2 to form SPdL3 is easier for L = TPF than for L = PPh3. The less ligated complex SPd(TFP)2 is the reactive species in the oxidative addition with phenyl iodide. In THF, Pd(dba)2 + nTFP, a mixture often used as a catalyst promoter in several synthetic organic reactions, is found to be less reactive than Pd(dba)2 + nPPh3 for small values of n (n = 2 or 4) whereas it is more reactive for higher values of n (n > 6). Conversely, in DMF, Pd(dba)2 + nTFP is always found to be more reactive than Pd(dba)2 + nPPh3 whatever n (n ≥ 2).

Item Type: Article
Subjects: Chemistry
Divisions: SCIENTIFIC PRODUCTION > Chemistry
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:45
URI: http://eprints.umi.ac.ma/id/eprint/2098

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