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1 article(s) from Iwashita, Kento

Three-component coupling of aryl iodides, allenes, and aldehydes catalyzed by a Co/Cr-hybrid catalyst

Kimihiro Komeyama,
Shunsuke Sakiyama,
Kento Iwashita,
Itaru Osaka and
Ken Takaki

Beilstein J. Org. Chem. 2018, 14, 1413–1420, doi:10.3762/bjoc.14.118

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Scheme 1: Nucleophilic and π-electrophilic characters of organometallics depending on the central metals.

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Scheme 2: Ni/Cr or Co/Cr-catalyzed NHK reaction.

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Scheme 3: Functionalization of alkynes via carbocobaltation.

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Scheme 4: Cyclization/borylation of alkynyl iodoarenes using the Co/Cr catalyst.

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Scheme 5: Three-component coupling of aryl iodides, arenes, and aldehydes using Co/Cr catalyst (this work).

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Scheme 6: Screening of aldehydes in the Co/Cr-catalyzed three-component coupling reaction. All yields are det...

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Scheme 7: Screening of aryl iodides in the Co/Cr-catalyzed three-component coupling reaction. All yields are ...

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Scheme 8: Screening of allenes in the Co/Cr-catalyzed three-component coupling reaction. All yields are deter...

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Scheme 9: Reversed diastereoselectivity using allenyl ethers 5 and 6. ^a4-chlorobenzaldehyde was used instead ...

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Scheme 10: Stoichiometric reaction of phenylchromium(II or III) reagents (reaction 1) and the three-component ...

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Scheme 11: The origin of the diastereoselectivity in the present three-component coupling.

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Scheme 12: Plausible reaction mechanism of the three-component coupling.

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Published 11 Jun 2018

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