- Pd-catalyzed cross-electrophile Coupling/C-H alkylation reaction enabled by a mediator generatedviaC(sp3)-H activation
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Transition-metal-catalyzed cross-electrophile C(sp2)-(sp3) coupling and C-H alkylation reactions represent two efficient methods for the incorporation of an alkyl group into aromatic rings. Herein, we report a Pd-catalyzed cascade cross-electrophile coupling and C-H alkylation reaction of 2-iodo-alkoxylarenes with alkyl chlorides. Methoxy and benzyloxy groups, which are ubiquitous functional groups and common protecting groups, were utilized as crucial mediatorsviaprimary or secondary C(sp3)-H activation. The reaction provides an innovative and convenient access for the synthesis of alkylated phenol derivatives, which are widely found in bioactive compounds and organic functional materials.
- Jiang, Hang,Wu, Zhuo,Zhang, Yanghui
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p. 8531 - 8536
(2021/07/02)
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- Dinitroalkyl aromatics polymerization retarders or inhibitors and methods for making and for using same
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A vinyl monomer inhibitor systems is disclosed which includes 2,6-dinitro-4-alkylated phenols and mixtures of 2,6-dinitro-4-alkylated phenols and 2,4-dinitro-6-alkylated phenols as well as vinyl monomer stabilized composition including an effective amount of the inhibitor systems. A method for the preparation and use is also disclosed where phenol is first alkylated under conditions that afford predominately monoalkylated phenols having a high para alkylation preference, followed by nitration of the alkylated phenols to form a dinitrated, monoalkylated product.
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- Facile Synthesis of 2,6-Dialkylphenols by Cross-Aromatization of Cyclohexanones with Aldehydes Catalyzed by Zirconocene Complexes
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2,6-Dialkylphenols, which are difficult to prepare by conventional methods, have been conveniently synthesized in one step via zirconocene-catalyzed cross-aromatization of cyclohexanones with aldehydes.
- Nakano, Tatsuya,Shirai, Hideki,Tamagawa, Hiroshi,Ishii, Yasutaka,Ogawa, Masaya
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p. 5181 - 5183
(2007/10/02)
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