52893-51-3Relevant academic research and scientific papers
Copper-Catalyzed Imidovinylation of Alkynes via 1,3-Vinyl Migration
Sun, Jiaqiong,Zheng, Guangfan,Zhang, Qiao,Wang, Yimin,Yang, Shengbiao,Zhang, Qian,Li, Yan,Zhang, Qian
supporting information, p. 3767 - 3770 (2017/07/26)
The first copper-catalyzed imidovinylation of alkynes has been developed, which grants facile access to various (E)-2-imido-2,4-dienals with high stereoselectivity under mild conditions. This transformation also represents the first 1,3-carbon migration o
Enantioselective fluorination of 2-oxindoles by structure-micro-tuned n-fluorobenzenesulfonamides
Wang, Fajie,Li, Juli,Hu, Qingyang,Yang, Xianjin,Wu, Xin-Yan,He, Haoming
, p. 3607 - 3613 (2014/06/23)
We describe our attempts to fine-tune the reactivity and selectivity of N-fluorobenzenesulfonamide in fluorination reactions by changing the substituents on its phenyl rings. A series of N-fluorobenzenesulfonamides bearing substituents at the ortho, meta, and para positions were prepared, and were used in the enantioselective fluorination of 2-oxindoles catalysed by chiral palladium complexes. Fluorinating reagents 1b, 1c, 1d, 1e, 1h, 1i, and 1j gave similar results to 1a, while 1f, 1g, and 1n gave worse yields and selectivities. Under mild reaction conditions, a series of 3-fluoro-2-oxindoles were obtained in excellent yields (up to 98%) and enantioselectivities (up to 99% ee) using N-fluoro-4,4′-difluoro-benzenesulfonamide as the fluorination agent. Copyright
Comparative studies on the enantioselective fluorination of oxindoles with structurally modified N-fluorobenzenesulfonimides
Zhang, Yan,Yang, Xian-Jin,Xie, Tian,Chen, Guan-Long,Zhu, Wen-Hua,Zhang, Xiao-Qi,Yang, Xue-Yan,Wu, Xin-Yan,He, Xiao-Peng,He, Hao-Ming
, p. 4933 - 4937 (2013/07/25)
Structurally modified N-fluorobenzenesulfonimides (NFSIs) have been used to study the enantioselective fluorination of oxindoles in the presence of a bis-cinchona alkaloid, (DHQD)2PHAL, as the catalyst. We observe that the NFSI analogues bearin
The investigation of fluorination reaction of p-substituted benzenesulfonimides with fluorine-nitrogen mixed gas to synthesize NFSI analogues
Yang, Xianjin,Chen, Guanlong,Chen, Fuli,Zhang, Yan,Yang, Xueyan,Yuan, Xiaoming,Wu, Fanhong
experimental part, p. 155 - 159 (2012/02/14)
This paper studied the fluorination reaction of p-substituted benzenesulfonimides with diluted elemental fluorine to synthesize N-fluoro-benzenesulfonimide (NFSI) analogues. Several synthetic methods were compared and we found that, for many p-substituted
