3955-65-5Relevant articles and documents
C2-Selective C-H methylation of heterocyclic N-oxides with sulfonium ylides
An, Won,Choi, Su Bin,Kim, Namhoon,Kwon, Na Yeon,Ghosh, Prithwish,Han, Sang Hoon,Mishra, Neeraj Kumar,Han, Sangil,Hong, Sungwoo,Kim, In Su
supporting information, p. 9004 - 9009 (2020/11/30)
A redox-neutral C2-selective methylation of heterocyclic N-oxides with sulfonium ylides is described herein. This report presents unprecedented findings for the utility of sulfonium ylides as the methylation source of N-heterocycles beyond the Corey-Chaykovsky reaction. Intriguingly, pyrrolidine plays a significant role in minimizing the reductive C2-methylation process. This method is characterized by its mild conditions, simplicity, and excellent site selectivity. The applicability of the developed protocol is showcased by the late-stage methylation and sequential transformations of complex drug molecules.
Cathode Material Determines Product Selectivity for Electrochemical C?H Functionalization of Biaryl Ketoximes
Zhao, Huai-Bo,Xu, Pin,Song, Jinshuai,Xu, Hai-Chao
supporting information, p. 15153 - 15156 (2018/10/31)
The synthesis of polycyclic N-heteroaromatic compounds and their corresponding N-oxides has been developed through electrochemical C?H functionalization of biaryl ketoximes. The oxime substrates undergo dehydrogenative cyclization when a Pt cathode is used, resulting in unprecedented access to a wide range of N-heteroaromatic N-oxides. The products of the electrosynthesis are switched to the deoxygenated N-heteroaromatics by employing a Pb cathode through sequential anode-promoted dehydrogenative cyclization and cathodic cleavage of the N?O bond in the initially formed N-oxide.
Pd-catalyzed assembly of phenanthridines from aryl ketone O-acetyloximes and arynes through C-H bond activation
Tang, Chen-Yu,Wu, Xin-Yan,Sha, Feng,Zhang, Fei,Li, Hao
supporting information, p. 1036 - 1039 (2014/02/14)
Pd-catalyzed annulation of aryne and aryl ketone O-acetyloxime via C-H bond activation was realized. Through the C-H bond activation/insertion/cyclization/ elimination reaction sequence, phenanthridines are successfully constructed, providing an attractiv