1184944-70-4Relevant academic research and scientific papers
Copper-Catalyzed Trifluoromethylation/Cyclization of Alkynes for Synthesis of Dioxodibenzothiazepines
Zhang, Zi-Qi,Xu, Yi-Hao,Dai, Jing-Cheng,Li, Yan,Sheng, Jie,Wang, Xi-Sheng
supporting information, p. 2194 - 2198 (2021/04/05)
A facile and efficient approach for the synthesis of the CF3-containing dioxodibenzothiazepines has been developed via copper-catalyzed trifluoromethylation/cyclization of alkynes utilizing a radical relay strategy. This method has demonstrated low cataly
Photoinduced Radical Cascade Cyclization: A Metal-Free Approach to Access Difluoroalkylated Dioxodibenzothiazepines
Deng, Yinglan,Jian, Jing-Xin,Lu, Maojian,Tong, Qing-Xiao,Xiao, Qian,Zhong, Jian-Ji
supporting information, p. 9303 - 9308 (2021/12/06)
A simple and mild photoredox catalytic approach to access difluoroalkylated dioxodibenzothiazepines in high regioselectivity via radical cascade cyclization has been described herein. In contrast to previous methods, this strategy does not involve the use
A Hg(OTf)2-Catalyzed Enolate Umpolung Reaction Enables the Synthesis of Coumaran-3-ones and Indolin-3-ones
Dai, Ning,Hu, Weican,Qian, Guoying,Rong, Zhouting
supporting information, p. 3286 - 3290 (2020/04/21)
The potential of mercury catalysis has been extended to the arena of enolate umpolung reactions for the first time by the generation of enolonium species via Hg(OTf)2-catalyzed N-oxide addition to alkynes. The enolonium species formed can undergo intramolecular nucleophilic attack by hydroxyl or amino groups, leading to the synthesis of various coumaran-3-ones and indolin-3-ones.
Copper-Catalyzed Tandem Cross-Coupling/[2 + 2] Cycloaddition of 1,6-Allenynes with Diazo Compounds to 3-Azabicyclo[5.2.0] Ring Systems
He, Min,Chen, Nuan,Zhou, Ting,Li, Qing,Li, Hongguang,Lang, Ming,Wang, Jian,Peng, Shiyong
, p. 9559 - 9563 (2019/11/21)
An unprecedented copper-catalyzed tandem cross-coupling/[2 + 2] cycloaddition of 1,6-allenynes with diazo compounds was reported, chemo- and regioselectively providing 3-azabicyclo[5.2.0] frameworks in moderate to excellent yields under mild reaction conditions. Moreover, the products readily convert to highly functionalized quinolines via oxidative radical rearrangement.
Synthesis of 2-(Trifluoromethyl)indoles via Domino Trifluoromethylation/Cyclization of 2-Alkynylanilines
Ye, Yibin,Cheung, Kelvin Pak Shing,He, Lisi,Tsui, Gavin Chit
supporting information, p. 1676 - 1679 (2018/03/23)
A new method for the synthesis of 2-(trifluoromethyl)indoles using easily accessible 2-alkynylanilines and a well-established fluoroform-derived CuCF3 reagent is described. This method utilizes a domino trifluoromethylation/cyclization strategy
Well-Defined Noble Metal Single Sites in Zeolites as an Alternative to Catalysis by Insoluble Metal Salts
Rubio-Marqués, Paula,Rivero-Crespo, Miguel A.,Leyva-Pérez, Antonio,Corma, Avelino
supporting information, p. 11832 - 11837 (2015/09/28)
Insoluble precious metal chlorides in polymeric form (i.e., PtCl2, PdCl2, AuCl, RhCl3) are commonly used as catalysts for a plethora of organic reactions in solution. Here we show that only the minor soluble fraction of these precious metal chlorides (typically 5-30%) is catalytically active for the hydroamination, hydroalkoxylation, hydrosilylation, and cycloisomerization of alkynes and alkenes, and that the resting insoluble metal is catalytically useless. To circumvent this waste of precious metal and follow a rational design, we generate here well-dispersed Pt(II) and Pd(II) single sites on zeolite Y, with an exquisite control of the Lewis acidity, to catalyze different hydroaddition reactions to alkynes and alkenes with up to 104 catalytic cycles (at least 2 orders of magnitude superior to precious metal chlorides) and with high isolated yields (82-99%, >15 examples).
Flexible and practical synthesis of 3-oxyindoles through gold-catalyzed intermolecular oxidation of o-ethynylanilines
Shu, Chao,Li, Long,Xiao, Xin-Yu,Yu, Yong-Fei,Ping, Yi-Fan,Zhou, Jin-Mei,Ye, Long-Wu
supporting information, p. 8689 - 8692 (2014/07/22)
A novel gold-catalyzed intermolecular oxidation of o-ethynylanilines has been developed. A range of functionalized 3-oxyindoles are readily accessed by utilizing this strategy. Importantly, this gold-catalyzed oxidative process outcompetes the typical ind
