- Cu(II)-Catalyzed Ortho-C-H Nitration of Aryl Ureas by C-H Functionalization
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A novel protocol for the aromatic ortho C-H nitration of aryl ureas with Fe(NO3)3·9H2O is developed. The reaction utilizes CuCl2·2H2O as catalyst and p-TSA as additive, showing good functional group tolerance and furnishing the desired products in moderate to excellent yields.
- Wang, Chun-Meng,Tang, Kai-Xiang,Gao, Tian-Hong,Chen, Lin,Sun, Li-Ping
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p. 8315 - 8321
(2018/07/15)
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- Transition Metal-Free Carbazole Synthesis from Arylureas and Cyclohexanones
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An efficient strategy for carbazole synthesis from arylureas and cyclohexanones under transition metal-free conditions has been developed. The combined use of potassium iodide and iodine could significantly improve the reaction efficiency to provide 2,6-disubstituted 9-arylcarbazoles in moderate to good yields. In this kind of transformation, the whole carbazole moiety (except the nitrogen atom) comes from two equivalents of cyclohexanones. (Figure presented.).
- Wu, Jun,Xie, Yanjun,Chen, Xiangui,Deng, Guo-Jun
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supporting information
p. 3206 - 3211
(2016/10/21)
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- Comparative catalytic C-H vs. C-Si activation of arenes with Pd complexes directed by urea or amide groups
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Analysis of regiocontrol in Pd-catalysed C-H activation leads to observations of aryltrimethylsilyl activation and to superior results with urea-based substrates.
- Rauf, Waqar,Thompson, Amber L.,Brown, John M.
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supporting information; experimental part
p. 3874 - 3876
(2010/01/06)
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- Distinct reactivity of Pd(OTs)2: The intermolecular Pd(II)-catalyzed 1,2-carboamination of dienes
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A Pd-catalyzed intermolecular 1,2-carboamination route to indolines from N-aryl ureas and 1,3-dienes that proceeds under mild conditions in relatively nonacidic media, is presented. The in situ generation, or preformation, of a palladium tosylate emerges as a key parameter in gaining the requisite reactivity for the C-H insertion/carbopalladation/nucleophilic displacement process. Copyright
- Houlden, Chris E.,Bailey, Chris D.,Ford, J. Gair,Gagne, Michel R.,Lloyd-Jones, Guy C.,Booker-Milburn, Kevin I.
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supporting information; experimental part
p. 10066 - 10067
(2009/02/04)
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