A novel methodology for synthesis of dihydropyrazole derivatives as potential anticancer agents
作者:Xu Wang、Ying-ming Pan、Xiao-chao Huang、Zhong-yuan Mao、Heng-shan Wang
DOI:10.1039/c3ob42432d
日期:——
A flexible and efficient method for the synthesis of 4,5-dihydropyrazole derivatives has been developed.
已开发出一种灵活高效的合成4,5-二氢吡唑衍生物的方法。
US4162913A
申请人:——
公开号:US4162913A
公开(公告)日:1979-07-31
US4170464A
申请人:——
公开号:US4170464A
公开(公告)日:1979-10-09
Transformations of 3-aryl-2-chloro-2-imidoylaziridines: novel entries to 4-chloro-2,5-diaryl-1H-imidazoles and 2-chloro-2-acylaziridines
作者:Filip Colpaert、Sven Mangelinckx、Nicola Giubellina、Norbert De Kimpe
DOI:10.1016/j.tet.2010.11.082
日期:2011.2
The reactivity of stereochemically defined 3-aryl-2-chloro-2-imidoylaziridines, an unexplored class of substituted aziridines, was investigated under various reaction conditions. 2-Chloro-2-imidoylaziridines underwent a novel thermal rearrangement by reflux in acetonitrile via C–C bond cleavage to 4-chloro-2,5-diarylimidazoles in high yield. Alternatively, a novel efficient entry toward 2-aroyl-2-chloroaziridines
Copper-Catalyzed Aerobic Intramolecular Dehydrogenative Cyclization of N,N-Disubstituted Hydrazones through C sp 3H Functionalization
作者:Guangwu Zhang、Yan Zhao、Haibo Ge
DOI:10.1002/anie.201209618
日期:2013.2.25
An aerobic activity: The title reaction proceeds through an oxidation/cyclization/aromatization sequence under an atmosphere of O2 (see scheme; DBU=1,8‐diazabicyclo[5.4.0]undec‐7‐ene, DCE=1,2‐dichloroethane, DMS=dimethylsulfide). This coupling reaction is the first to proceed via an iminium intermediate for a CH bond‐functionalization process, and provides an environmentally friendly and atom‐efficient