these cell lines. Our results showed that the effectiveness of compound 11a may be attributed to its suppression of the survival of HT-29. Secondly, in the Hoechst 33258 staining test, compound 11a-treated cells exhibited nuclear condensation typical of apoptosis. Additionally, cell cycle analysis by flow cytometry indicated that compound 11a arrested HT-29 cells in the S phase. Furthermore, cell death
Organocatalytic Enantioselective Michael‐Aldol[3+2] Annulation for the Synthesis of Nitro‐Methanobenzo[7] annulenes
作者:Yang Zhang、Jin‐Yu Liu、Xiao‐Hai Zhang
DOI:10.1002/ejoc.202100974
日期:2021.9.21
An enantioselective Michael-Aldol[3+2] annulation via bifunctional thiourea catalysis has been reported, and a series of nitro-methanobenzo[7]annulenes with potential biological activities were synthesized in good yields with excellent enantio- and diastereoselectivities.
Towards targeting anticancer drugs: ruthenium(<scp>ii</scp>)–arene complexes with biologically active naphthoquinone-derived ligand systems
作者:Mario Kubanik、Wolfgang Kandioller、Kunwoo Kim、Robert F. Anderson、Erik Klapproth、Michael A. Jakupec、Alexander Roller、Tilo Söhnel、Bernhard K. Keppler、Christian G. Hartinger
DOI:10.1039/c6dt01110a
日期:——
2-hydroxy-[1,4]-naphthoquinone-derived ligands and their coordination to a RuII(η6-p-cymene)Cl moiety. The synthesis of oxime derivatives resulted in the surprising formation of nitroso-naphthalene complexes, as confirmed by X-ray diffraction analysis. The compounds were shown to be stable in aqueous solution but reacted with glutathione and ascorbic acid rather than undergoing reduction. One-electron reduction
Regioselective alkylation of substituted quinones by trialkylboranes
作者:Lothar W. Bieber、Pedro J. Rolim Neto、Regina M. Generino
DOI:10.1016/s0040-4039(99)00804-7
日期:1999.6
2-Methoxy-1,4-benzoquinone can be alkylated selectively with trialkylboranes in position 5, givinghigh yields of 5-alkyl-2-methoxy-1,4-benzoquinones after oxidative work up. In the case of 2-hydroxy-1,4-naphthoquinone, the same procedure leads to 3-alkylated products. A radical chain mechanism is proposed to explain the observed selectivity.