从易于获得的起始原料中,以5-6个步骤合成了许多5-arylisatin衍生物。它们的结构通过1 H NMR和13 C NMR以及LC / MS确认。在体外通过MTT分析评估了这些新颖的靛红对人白血病K562细胞的细胞毒性。SAR研究表明,N-取代的苄基和C-5取代的苯基基团大大增强了它们的细胞毒性活性,而保持在母体环上C-3上完整的羰基官能度是必需的。尤其是,N-(对甲氧基苄基)-5-(对甲氧基苯基)Isatin(化合物2m)对K562细胞系表现出最高的抗肿瘤活性(IC50 = 0.03μM)。此外,化合物2m的治疗可显着抑制肝癌HepG2细胞的增殖和迁移,这也可以减少人脐静脉内皮细胞(HUVEC)管的形成。总之,化合物2m在体外通过血管生成反应表现出非常良好的癌细胞增殖抑制作用,并且2m可能是有希望的用于癌症治疗的血管生成抑制剂。
efficient and catalyticasymmetric alkynylation of isatins has been developed using a bifunctional amidophosphine‐urea/AgBF4 complex as the catalyst. By a combination of metal catalysis and organocatalysis, excellent enantioselectivities (up to 99 % ee) and good yields are achieved. A wide range of both terminal alkynes and isatins are tolerated by this new catalyst system, providing access to structurally
Enantioselective and Regioselective Indium(III)-Catalyzed Addition of Pyrroles to Isatins
作者:Elisa G. Gutierrez、Casey J. Wong、Aziza H. Sahin、Annaliese K. Franz
DOI:10.1021/ol202329s
日期:2011.11.4
The indium(III)-catalyzed enantioselective and regioselectiveaddition of pyrroles to isatins is described. The effects of metal and solvent on the reactivity and selectivity are compared and discussed, demonstrating that the indium(III)–indapybox complex provides the most effective catalyst. A case of divergent reactivity between pyrroles and indoles is presented.
appearance of numerous drug-unresponsive strains of Leishmania donovani and severe toxic side effects of conventional antileishmanial therapy necessitates the search for novel leads, to treat visceral leishmaniasis efficiently. The current study deals with the synthesis and biologicalevaluation of a unique C-5 functionalized oxindole based polyphenol to ascertain its activities against L. donovani infection
A novel series of hybrids of indolin-2-one and quinazolin-4(3H)-one linked via an imine bond were synthesized and tested for their inhibitory activity against the proliferation of a panel of five human cancer cell lines. We found that compound 5c bearing 5-bromo substituent at the indolin-2-one ring exhibited weak cytotoxic activity with percentages of inhibition ranging from 27% to 49% at 20 μM, while its counterpart 7c having 4-methoxybenzyl group at the N1-position of indolin-2-one ring was more active with percentages of inhibition in range of 32-63%. These results indicate that the presence of a bromo substituent at the 5-position and a 4-methoxybenzyl group at the N1-position of indolin-2-one ring is important for the cytotoxic activity.