- Palladium-catalyzed direct arylation of aryl(azaaryl)methanes with aryl halides providing triarylmethanes
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Direct arylation of aryl(azaaryl)methanes with aryl halidas takes place at the benzylic position in the presence of a hydroxide base under palladium catalysis to yield triarylmethanes
- Niwa, Takashi,Yorimitsu, Hideki,Oshima, Koichiro
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- Palladium-Catalyzed Triarylation of sp3 C?H Bonds in Heteroarylmethanes: Synthesis of Triaryl(heteroaryl)methanes
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A straightforward method for the palladium-catalyzed triarylation of heteroarylmethanes at the methyl group has been developed. The reaction works with a variety of aryl halides, enabling the rapid synthesis of triaryl(heteroaryl)methanes in moderate to e
- Zhang, Shuguang,Hu, Bowen,Zheng, Zhipeng,Walsh, Patrick J.
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supporting information
p. 1493 - 1498
(2018/03/05)
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- Trichloroisocyanuric Acid/Triphenylphosphine-Mediated Synthesis of Benzimidazoles, Benzoxazoles, and Benzothiazoles
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A new and efficient method for preparation of benzimidazoles, benzoxazoles, and benzothiazoles from reactions of different carboxylic acids with o-phenylenediamine, o-aminophenol, and o-aminothiophenol in the presence of triphenylphosphine/trichloroisocyanuric acid system is presented. The desired products have been characterised on the basis of spectral (infrared, NMR, mass spectrometry) data, and the mechanism of their formation is proposed. The remarkable advantages are the inexpensive and readily available reagent, simple procedure, mild conditions, and good-to-excellent yields.
- Rezazadeh, Soodabeh,Akhlaghinia, Batool,Razavi, Nasrin
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p. 145 - 155
(2015/05/05)
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- Pd(0)-catalyzed diarylation of sp3 C-H bond in (2-azaaryl)methanes
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A highly efficient and selective palladium-catalyzed diarylation of (2-azaaryl)methanes at the methyl group is described. Aryl chlorides proved reactive enough. A palladium η3-azaallyl intermediate has been identified on the basis of DFT studies.
- Song, Guoyong,Su, Yan,Gong, Xue,Han, Keli,Li, Xingwei
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supporting information; experimental part
p. 1968 - 1971
(2011/06/25)
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- Copper-catalyzed direct benzylation or allylation of 1,3-azoles with N -tosylhydrazones
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Cu-Catalyzed cross-coupling of N-tosylhydrazones with 1,3-azoles leads to the direct C-H benzylation or allylation. Cu carbene migratory insertion is proposed to play the key role in this transformation.
- Zhao, Xia,Wu, Guojiao,Zhang, Yan,Wang, Jianbo
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supporting information; experimental part
p. 3296 - 3299
(2011/04/24)
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- FACILE SYNTHESIS OF 2-SUBSTITUTED BENZOTHIAZOLES VIA KETENES
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The generation of phenyl-, diphenyl-, phenoxy-, and chloroketenes, by the dehydrochlorination of the corresponding acid chlorides with triethylamine, in the presence of 2-aminothiophenol 1 gave 2-substituted benzothiazoles 3 in good yields.
- Abayeh, O.J.,Olagbemiro, T.O.,Agho, M.O.,Amupitan, J.O.
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p. 687 - 690
(2007/10/02)
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- 1-Methyl-2-pyrrolidinone: A Well-Adapted Solvent in the Benzothiazoles Synthesis
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We describe the synthesis of a series of 2-aryl and 2-alkyl benzothiazoles with high yields using 1-methyl-2-pyrrolidinone as reaction solvent.
- Brembilla, A.,Roizard, D.,Lochon, P.
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p. 3379 - 3384
(2007/10/02)
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