Rhodium(I)-catalyzed intramolecular ene reaction of vinylidenecyclopropanes and alkenes for the formation of bicyclo[5.1.0]octylenes

Wei Li; Wei Yuan; Min Shi; Erik Hernandez; Guigen Li

doi:10.1021/ol902505p

Rhodium(I)-catalyzed intramolecular ene reaction of vinylidenecyclopropanes and alkenes for the formation of bicyclo[5.1.0]octylenes

Wei Li, Wei Yuan, Min Shi, Erik Hernandez, Guigen Li

Chemistry and Biochemistry

Research output: Contribution to journal › Article

37 Scopus citations

Abstract

"Chemical Equation Presented" An efficient catalytic system for the intramolecular ene reaction of allene and alkene of diarylvinylidenecyclopropanes has been established. The reaction was achieved by using [RhCl(CO)₂]₂ as the catalyst in co-solvents of toluene and acetonitrile. MeCN was found to play a crucial role in controlling the reaction toward formation of bicyclo[5.1.0]octylene derivatives. An alternative system consisting of [RhCl(CO)₂]₂ and toluene in the absence of MeCN was found to give [2 + 2] cycloaddition adducts. The structures have been unambiguously determined by X-ray structural analysis. Deuterium labeling experiments were conducted to confirm the mechanism hypothesis.

Original language	English
Pages (from-to)	64-67
Number of pages	4
Journal	Organic Letters
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/ol902505p
State	Published - Jan 1 2010

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10.1021/ol902505p

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title = "Rhodium(I)-catalyzed intramolecular ene reaction of vinylidenecyclopropanes and alkenes for the formation of bicyclo[5.1.0]octylenes",

abstract = "{"}Chemical Equation Presented{"} An efficient catalytic system for the intramolecular ene reaction of allene and alkene of diarylvinylidenecyclopropanes has been established. The reaction was achieved by using [RhCl(CO)2]2 as the catalyst in co-solvents of toluene and acetonitrile. MeCN was found to play a crucial role in controlling the reaction toward formation of bicyclo[5.1.0]octylene derivatives. An alternative system consisting of [RhCl(CO)2]2 and toluene in the absence of MeCN was found to give [2 + 2] cycloaddition adducts. The structures have been unambiguously determined by X-ray structural analysis. Deuterium labeling experiments were conducted to confirm the mechanism hypothesis.",

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T1 - Rhodium(I)-catalyzed intramolecular ene reaction of vinylidenecyclopropanes and alkenes for the formation of bicyclo[5.1.0]octylenes

AU - Li, Wei

AU - Yuan, Wei

AU - Shi, Min

AU - Hernandez, Erik

AU - Li, Guigen

PY - 2010/1/1

Y1 - 2010/1/1

N2 - "Chemical Equation Presented" An efficient catalytic system for the intramolecular ene reaction of allene and alkene of diarylvinylidenecyclopropanes has been established. The reaction was achieved by using [RhCl(CO)2]2 as the catalyst in co-solvents of toluene and acetonitrile. MeCN was found to play a crucial role in controlling the reaction toward formation of bicyclo[5.1.0]octylene derivatives. An alternative system consisting of [RhCl(CO)2]2 and toluene in the absence of MeCN was found to give [2 + 2] cycloaddition adducts. The structures have been unambiguously determined by X-ray structural analysis. Deuterium labeling experiments were conducted to confirm the mechanism hypothesis.

AB - "Chemical Equation Presented" An efficient catalytic system for the intramolecular ene reaction of allene and alkene of diarylvinylidenecyclopropanes has been established. The reaction was achieved by using [RhCl(CO)2]2 as the catalyst in co-solvents of toluene and acetonitrile. MeCN was found to play a crucial role in controlling the reaction toward formation of bicyclo[5.1.0]octylene derivatives. An alternative system consisting of [RhCl(CO)2]2 and toluene in the absence of MeCN was found to give [2 + 2] cycloaddition adducts. The structures have been unambiguously determined by X-ray structural analysis. Deuterium labeling experiments were conducted to confirm the mechanism hypothesis.

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