Preparation of triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes and their application as catalyst precursors in the carbonylation of ethyl diazoacetate to diethyl malonate

Robert Tuba, Eszter Förds, Ferenc Ungváry

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The triphenylphosphane substituted derivatives Co2(CO) 6(CHCO2Et)(PPh3), [μ 2-{ethoxycarbonyl(methylene)}-μ 2-(carbonyl)-(tricarbonyl-cobalt) -(triphenylphosphane-dicarbonyl-cobalt) (CoCo)] (3) and Co2(CO) 5(CHCO2Et)(PPh3)2, [μ 2-{ethoxycarbonyl-(methylene)}-μ 2-(carbonyl)-bis(triphenylphosphane-dicarbonyl-cobalt) (Co-Co)] (4) were prepared from the known Co2(CO)7(CHCO2Et) (1) and Co2(CO)6(CHCO2Et)2 (2) complexes with triphenylphosphane. The new complexes 3 and 4 as well as Co 2(CO)7(PPh3), Co2(CO) 6(PPh3)2, and Co2(CO)6 (dppm) (dppm = Ph2PCH2PPh2) were found to be suitable catalyst precursors in the selective carbonylation of ethyl diazoacetate to diethyl malonate in the presence of ethanol.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume236
Issue number1-2
DOIs
Publication statusPublished - Jul 18 2005

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Keywords

  • Carbene carbon monoxide coupling
  • Diethyl malonate
  • Triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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