21905-78-2Relevant articles and documents
Synthesis of 4-azachromeno[2,3-b]indol-11(6H)-one and its derivatives as analogues of ellipticine
Chen, Yanhong,Yang, Chunhao,Xie, Yuyuan
, p. 251 - 258 (2010)
4-Azachromeno[2,3-b]indol-11(6H)-ones (4) and their derivatives (5) as analogues of ellipticine were synthesized through a straightforward, two or three-step process. Tetracyclic heterocycles (4) were obtained by facile cyclization of indolin-2-ones (2) or (3) and 2-chloronicotinoyl chloride under the condition of the 'Jensen'-reaction. Alkylation of the compounds (4) afforded 6-substituted 4-azachromeno[2,3-b]indol-ll(6H)-ones.
Discovery of a potent inhibitor of MELK that inhibits expression of the anti-apoptotic protein Mcl-1 and TNBC cell growth
Edupuganti, Ramakrishna,Taliaferro, Juliana M.,Wang, Qiantao,Xie, Xuemei,Cho, Eun Jeong,Vidhu, Fnu,Ren, Pengyu,Anslyn, Eric V.,Bartholomeusz, Chandra,Dalby, Kevin N.
, p. 2609 - 2616 (2017/04/06)
Despite recent advances in molecularly directed therapy, triple negative breast cancer (TNBC) remains one of the most aggressive forms of breast cancer, still without a suitable target for specific inhibitors. Maternal embryonic leucine zipper kinase (MELK) is highly expressed in TNBC, where level of overexpression correlates with poor prognosis and an aggressive disease course. Herein, we describe the discovery through targeted kinase inhibitor library screening, and structure-guided design of a series of ATP-competitive indolinone derivatives with subnanomolar inhibition constants towards MELK. The most potent compound, 17, inhibits the expression of the anti-apoptotic protein Mcl-1 and proliferation of TNBC cells exhibiting selectivity for cells expressing high levels of MELK. These studies suggest that further elaboration of 17 will furnish MELK-selective inhibitors with potential for development in preclinical models of TNBC and other cancers.
General synthesis of mono-, di-, and tri-acetylated indoles from indolin-2-ones
Jha, Mukund,Chou, Ting-Yi,Blunt, Brian
experimental part, p. 982 - 989 (2011/03/19)
Having developed the one-pot triacetylation of indolin-3-ones, we have now devised a simple two-step reaction sequences to produce di- and mono-acetylated indoles from indolin-2-ones. The indolin-2-ones were first subjected to acetylation in the presence of acetic anhydride and a catalytic amount of N,N-dimethylaminopyridine to give 2-acetoxy-1,3-diacetylindoles. Subsequently, an enzyme-assisted deacetylation resulted in the chemoselective deprotection of the acetoxy group to produce 1,3-diacetyl-2-hydroxyindoles. However, a chemical deacetylation of 2-acetoxy-1,3-diacetylinoles under mild basic or acidic conditions resulted in the formation of 3-acetyl-2-hydroxyindoles.
