130289-79-1Relevant academic research and scientific papers
Two-Step One-Pot Synthesis of Unsymmetrical (Hetero)Aryl 1,2-Diketones by Addition-Oxygenation of Potassium Aryltrifluoroborates to (Hetero)Arylacetonitriles
Kumar, Yogesh,Jaiswal, Yogesh,Kumar, Amit
, p. 494 - 505 (2018/02/09)
An efficient one-pot two-step procedure for the synthesis of unsymmetrical (hetero)aryl 1,2-diketones has been developed. The reaction proceeds through a palladium-catalyzed nucleophilic addition of potassium aryltrifluoroborates to aliphatic nitriles followed by a copper-catalyzed aerobic benzylic C–H oxygenation using molecular oxygen as a green oxidant. This represents the first example of the direct synthesis of unsymmetrical diaryl 1,2-diketones from arylacetonitriles. This method utilizes inexpensive, stable, nontoxic, and readily available starting materials, is highly effective in the presence of both electron-rich and electron-poor nitriles and aryltrifluoroborates, and tolerates a wide variety of functional groups. The synthetic utility of this transformation was shown by increasing the scale of the reaction and by carrying out the one-pot protocol for the preparation of quinoxaline and benzimidazole derivatives. A plausible reaction mechanism has also been proposed.
Synthesis of 3-acylated indoles through iron-catalyzed oxidative coupling of indoles with α-amino carbonyl compounds
Yi, Niannian,Li, Jinxia,Zhang, Hao,Wang, Ruijia,Jiang, Jun,Deng, Wei,Zeng, Zebing,Xiang, Jiannan
supporting information, p. 2062 - 2069 (2017/10/13)
A novel iron-catalyzed oxidative coupling of indoles with α-amino carbonyl compounds has been developed. The transformation provides an attractive approach to the synthesis of 3-acylindoles, with the advantages of easily available starting materials and high functional group tolerance. Furthermore, control experiments imply that a radical process maybe involved in this reaction.
Copper-catalyzed synthesis of indolyl diketones: Via C-H oxidation/diacylation of indoles with arylglyoxal hydrates
Wang, Cuiping,Zhang, Zhiqiang,Liu, Kui,Yan, Jingbo,Zhang, Tiexin,Lu, Gonghao,Meng, Qingtao,Chi, Haijun,Duan, Chunying
supporting information, p. 6185 - 6193 (2017/08/02)
An expedient protocol for Cu-catalyzed C-H oxidation/diacylation of indoles with arylglyoxal hydrates to construct indolyl diketones is developed. This methodology exhibits the synthetic utility of the synthesis of an indole-alkaloid 1,2-di(1H-indol-3-yl)ethane-1,2-dione and offers a straightforward means to produce different indolyl nitrogen-containing heterocycles such as indolyl quinoxaline, indolyl hydantoin and indolyl imidazole in high yields. Preliminary mechanistic studies indicate that two proposed pathways are involved in this process.
3-dicarbonyl substitution indole compound and preparation method thereof
-
Paragraph 0015; 0016; 0027; 0028, (2016/10/09)
The invention discloses a 3-dicarbonyl substitution indole compound and a preparation method thereof, and belongs to the technical field of synthesis of indole derivatives. According to the technical scheme, the 3-dicarbonyl substitution indole compound i
The dicarbonylation of indoles: Via Friedel-Crafts reaction with dicarbonyl nitrile generated in situ and retro-cyanohydrination
Yan, Jianwei,He, Guangjie,Yan, Fulin,Zhang, Jixia,Zhang, Guisheng
, p. 44029 - 44033 (2016/06/09)
A novel one-pot tandem reaction of indole and β-carbonyl nitrile to generate dicarbonyl indoles has been developed. This tandem process involves α-oxonation of the β-carbonyl nitrile to afford α,β-dicarbonyl nitrile, Friedel-Crafts reaction with indoles and subsequent retro-cyanohydrination of cyano tertiary alcohol form dicarbonyl indoles.
Palladium-catalyzed synthesis of 3-acylated indoles involving oxidative cross-coupling of indoles with α-amino carbonyl compounds
Tang, Ri-Yuan,Guo, Xiao-Kang,Xiang, Jian-Nan,Li, Jin-Heng
, p. 11163 - 11171 (2013/12/04)
A new and selective C-N bond oxidative cleavage method to 3-acylated indoles by Pd-catalyzed oxidative cross coupling of indoles with α-amino carbonyl compounds has been developed; moreover, one-pot synthesis of 3-acylated indoles from 2-ethynylanilines and α-amino carbonyl compounds has also been established. Importantly, the products 3-acylated indoles can be used to construct polyheterocyclic compound, which can be employed as efficient probes for Hg2+ and Fe3+.
Copper-catalyzed C-H oxidation/cross-coupling of α-amino carbonyl compounds
Wu, Ji-Cheng,Song, Ren-Jie,Wang, Zhi-Qiang,Huang, Xiao-Cheng,Xie, Ye-Xiang,Li, Jin-Heng
supporting information; experimental part, p. 3453 - 3457 (2012/06/01)
Keeping options open: The new and mild title reaction involving indoles selectively furnishes 1 and 2 with the aid of tert-butyl hydroperoxide (TBHP). The method represents the first example of a copper-catalyzed α arylation of α-amino carbonyl substrates leading to α-aryl α-imino and α-aryl α-oxo carbonyl compounds using a C-H oxidation strategy. Copyright
