Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

Vladimir B. Golovko; Louisa J. Hope-Weeks; Martin J. Mays; Mary McPartlin; Anna M. Sloan; Anthony D. Woods

doi:10.1039/b310515f

Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

Vladimir B. Golovko, Louisa J. Hope-Weeks, Martin J. Mays, Mary McPartlin, Anna M. Sloan, Anthony D. Woods

Chemistry and Biochemistry

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Abstract

The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co ₂(CO)₆(μ-η²-HOMe₂CC≡C-) }₂] 1 in the presence of a variety of nucleophiles leads in each case to [{Co₂(CO)₆}₂{cyclo-μ-η²: μ-η²-C(=CH₂)CH₂CMe₂C≡C- C≡}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co ₂(CO)₆}₂{μ-η²:μ- η²-1,4-C₆H₄(C≡CCMe ₂OH)₂}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.

Original language	English
Pages (from-to)	527-534
Number of pages	8
Journal	New Journal of Chemistry
Volume	28
Issue number	4
DOIs	https://doi.org/10.1039/b310515f
State	Published - Apr 2004

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title = "Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne",

abstract = "The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co 2(CO)6(μ-η2-HOMe2CC≡C-) }2] 1 in the presence of a variety of nucleophiles leads in each case to [{Co2(CO)6}2{cyclo-μ-η2: μ-η2-C(=CH2)CH2CMe2C≡C- C≡}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co 2(CO)6}2{μ-η2:μ- η2-1,4-C6H4(C≡CCMe 2OH)2}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.",

author = "Golovko, {Vladimir B.} and Hope-Weeks, {Louisa J.} and Mays, {Martin J.} and Mary McPartlin and Sloan, {Anna M.} and Woods, {Anthony D.}",

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T1 - Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

AU - Golovko, Vladimir B.

AU - Hope-Weeks, Louisa J.

AU - Mays, Martin J.

AU - McPartlin, Mary

AU - Sloan, Anna M.

AU - Woods, Anthony D.

PY - 2004/4

Y1 - 2004/4

N2 - The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co 2(CO)6(μ-η2-HOMe2CC≡C-) }2] 1 in the presence of a variety of nucleophiles leads in each case to [{Co2(CO)6}2{cyclo-μ-η2: μ-η2-C(=CH2)CH2CMe2C≡C- C≡}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co 2(CO)6}2{μ-η2:μ- η2-1,4-C6H4(C≡CCMe 2OH)2}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.

AB - The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co 2(CO)6(μ-η2-HOMe2CC≡C-) }2] 1 in the presence of a variety of nucleophiles leads in each case to [{Co2(CO)6}2{cyclo-μ-η2: μ-η2-C(=CH2)CH2CMe2C≡C- C≡}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co 2(CO)6}2{μ-η2:μ- η2-1,4-C6H4(C≡CCMe 2OH)2}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.

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JF - New Journal of Chemistry

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Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

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