152190-58-4Relevant academic research and scientific papers
Antimicrobial activity of a new series of benzimidazole derivatives
Oezkay, Yusuf,TunalI, Yagmur,Karaca, Huelya,IsIkdag, Ilhan
, p. 1427 - 1435 (2011)
Due to antimicrobial importance of benzimidazoles and hydrazones, some benzimidazolehydrazone compounds were synthesized to screen their antimicrobial activity. Structures of the synthesized compounds were elucidated by 1H-NMR, IR and ES-MS spe
Asymmetric Carbene-Catalyzed Oxidation of Functionalized Aldimines as 1,4-Dipoles
Wang, Guanjie,Zhang, Qiao-Chu,Wei, Chenlong,Zhang, Ye,Zhang, Linxue,Huang, Juhui,Wei, Donghui,Fu, Zhenqian,Huang, Wei
supporting information, p. 7913 - 7919 (2021/03/03)
The use of functionalized aldimines has been demonstrated as newly structural 1,4-dipole precursors under carbene catalysis. More importantly, enantiodivergent organocatalysis has been successfully developed using carbene catalysts with the same absolute configuration, leading to both (R)- and (S)- enantiomers of six-membered heterocycles with quaternary carbon centers. This strategy features a broad substrate scope, mild reaction conditions, and good enantiomeric ratio. DFT calculation results indicated that hydrogen bond C?H???F interactions between the catalyst and substrate are the key factors for controlling and even switching the enantioselectivity. These new 1,4-dipoles can also react with isatin and its imines under carbene catalysis, allowing for access to the spiro oxindoles with excellent enantiomeric ratios.
