Chiral Palladium Complexes from N-Diphenylphosphinoamino Methyl Esters

Q Zhang, Alexandra Martha Zoya Slawin, John Derek Woollins

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

(S)-N,S-Bis(diphenylphosphino) cystein methyl ester (bdppcys 3) is obtained from the reaction of chlorodiphenylphosphine with (S)-cystein methyl ester hydrochloride in the presence of Et3N as (S)-N-diphenylphosphinoalanine methyl ester (dppal 1) and (S)-N-diphenylphosphinomethionine methyl ester (dppmet 2). Compounds 1-3 show different coordination behaviour to [PdCl2(cod)]. Ligand 1 and [PdCl2(cod)] give an unexpected chloro-bridged binuclear complex trans-[PdCl(mu -Cl)(dppal-P)](2) 4. Compound 2 interacts with [PdCl2(cod)] to give a chelate complex cis-[PdCl2(dppmet-S,P)] 5. Reaction of 3 with [PdCl2(cod)] leads to an unstable chelate complex cis-[PdCl2(dppcys-P,P')] 6, which gradually decomposes into a novel sulfur-bridged binuclear complex trans-[PdCl(mu -S)-dppcys-P)](2) 7 and a chloro-bridged binuclear complex trans-[Pd(mu -Cl)(P(O)Ph-2-P)(P(OH)Ph-2-P)](2) 8.

Original languageEnglish
Pages (from-to)3598-3602
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number24
DOIs
Publication statusPublished - 2001

Keywords

  • TRANSITION-METAL COMPLEXES
  • RAY CRYSTAL-STRUCTURE
  • BIDENTATE LIGAND
  • CARBONYLATION
  • DERIVATIVES
  • PHOSPHINE
  • PD

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