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Dive into the research topics where Chika I. Someya is active.

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Featured researches published by Chika I. Someya.


Catalysis Letters | 2013

Nickel-catalyzed C(sp 2 )–C(sp 2 ) Cross Coupling Reactions of Sulfur-Functionalities and Grignard Reagents

Chika I. Someya; Maik Weidauer; Stephan Enthaler

In the present study, the nickel-catalyzed carbon carbon bond formation of a range of sulfur containing substrates with Grignard reagents via desulfurization has been explored. After investigation of different reaction parameters with a well-defined nickel complex an excellent and easy-accessible pre-catalyst was found. The obtained system was capable to convert a broad scope of substrates under mild reaction conditions.Graphical Abstract


Catalysis Letters | 2012

Application of a Nickel-Bispidine Complex as Pre-Catalyst for C(sp 2 )-C(sp 3 ) Bond Formations

Michael Haberberger; Chika I. Someya; Elisabeth Irran; Stephan Enthaler

In the present study, the nickel-catalyzed cross coupling of aryl halides with benzyl zinc bromides or dialkyl zinc reagents to create C(sp2)–C(sp3) bonds has been explored. As pre-catalyst the well-defined and easy-accessible (bispidine)Ni(NO3)2 complex has been applied. After investigation of different reaction parameters a broad scope of C(sp2)–C(sp3) bond formations were feasible under mild reaction conditions.Graphical Abstract.


Chemistry Letters | 2013

Application of a Bis(silylene) Nickel Complex as Precatalyst in C–C Bond Formation Reactions

Chika I. Someya; Michael Haberberger; Wenyuan Wang; Stephan Enthaler; Shigeyoshi Inoue


Chemistry: A European Journal | 2012

Reductive cleavage of amides to alcohols and amines catalyzed by well-defined bimetallic molybdenum complexes.

Sebastian Krackl; Chika I. Someya; Stephan Enthaler


Chemical Communications | 2011

Formation of N-heterocyclic, donor-stabilized borenium ions

Chika I. Someya; Shigeyoshi Inoue; Carsten Präsang; Elisabeth Irran; Matthias Driess


European Journal of Inorganic Chemistry | 2012

Application of Nickel Complexes Modified by Tridentate O,N,O′-Ligands as Precatalysts in Nickel-Catalyzed C(sp2)–C(sp3) Bond Formations

Chika I. Someya; Shigeyoshi Inoue; Sebastian Krackl; Elisabeth Irran; Stephan Enthaler


Journal of Organometallic Chemistry | 2013

Nickel-catalyzed hydrodehalogenation of aryl halides

Maik Weidauer; Elisabeth Irran; Chika I. Someya; Michael Haberberger; Stephan Enthaler


European Journal of Inorganic Chemistry | 2011

New Binding Modes of 1-Acetyl- and 1-Benzoyl-5-hydroxypyrazolines – Synthesis and Characterization of O,O′-Pyrazoline- and N,O-Pyrazoline-Zinc Complexes

Chika I. Someya; Shigeyoshi Inoue; Elisabeth Irran; Sebastian Krackl; Stephan Enthaler


Asian Journal of Organic Chemistry | 2013

Nickel-catalyzed Hydrodecyanation of Carbon–Cyano Bonds

Maik Weidauer; Chika I. Someya; Elisabeth Irran; Stephan Enthaler


Asian Journal of Organic Chemistry | 2012

Nickel Complexes Modified by O,N,O’-Ligands as Synthons for the Straightforward Synthesis of Highly Efficient Precatalysts for CC Bond Formation

Chika I. Someya; Elisabeth Irran; Stephan Enthaler

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Stephan Enthaler

Technical University of Berlin

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Elisabeth Irran

Technical University of Berlin

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Shigeyoshi Inoue

Technical University of Berlin

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Maik Weidauer

Technical University of Berlin

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Michael Haberberger

Technical University of Berlin

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Sebastian Krackl

Technical University of Berlin

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Carsten Präsang

Technical University of Berlin

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Jan Dirk Epping

Technical University of Berlin

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Matthias Driess

Technical University of Berlin

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Robert Kretschmer

Technical University of Berlin

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