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, F. Ungváry

Research output: Article

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 - júl. 18 2005

Fingerprint

Carbonylation
Cobalt
cobalt
methylene
catalysts
preparation
Catalysts
Ethanol
ethyl alcohol
Derivatives
diazoacetic ester
diethyl malonate

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Materials Science (miscellaneous)

Cite this

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title = "Preparation of triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes and their application as catalyst precursors in the carbonylation of ethyl diazoacetate to diethyl malonate",
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.",
keywords = "Carbene carbon monoxide coupling, Diethyl malonate, Triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes",
author = "Robert Tuba and Eszter F{\"o}rds and F. Ungv{\'a}ry",
year = "2005",
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journal = "Journal of Molecular Catalysis A: Chemical",
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T1 - Preparation of triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes and their application as catalyst precursors in the carbonylation of ethyl diazoacetate to diethyl malonate

AU - Tuba, Robert

AU - Förds, Eszter

AU - Ungváry, F.

PY - 2005/7/18

Y1 - 2005/7/18

N2 - 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.

AB - 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.

KW - Carbene carbon monoxide coupling

KW - Diethyl malonate

KW - Triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes

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