3135-51-1

Upstream product

• 110-86-1 pyridine 
• 117-80-6 2,3-Dichloro-1,4-naphthoquinone 
• 1620-53-7 1-phenyl-2-pyridin-2-ylethanone 
• 98-86-2 acetophenone 
• 130-15-4 [1,4]naphthoquinone 
• 93-91-4 1-phenylbutan-1,3-dione 
• 18413-03-1 N-(Phenacyl)pyridinium 
• 70-11-1 α-bromoacetophenone 
• 1214-47-7 1-(2-hydroxyphenyl)-3-phenylprop-2-en-1-one 

Downstream Products

• 75277-14-4 6,11-diacetoxynaphth<2,3-b>indolizin-12-yl phenyl ketone 

Relevant academic research and scientific papers

Synthesis of benzo[f]pyrido[1,2-a]indole-6,11-diones via the I2-promoted reactions of methyl ketones with pyridines and 1,4-naphthoquinone

An effective synthesis of benzo[f]pyrido[1,2-a]indole-6,11-diones has been achieved via the I2-promoted reactions of methyl ketones, pyridines and 1,4-naphthoquinone. In this reaction, either aromatic or aliphatic methyl ketones proceeded well. The advantages of this method include a broad substrate scope, metal-free reaction conditions, and high atom- and step-economy.

6,11-Dioxobenzo[ f]pyrido[1,2- a]indoles Kill Mycobacterium tuberculosis by Targeting Iron-Sulfur Protein Rv0338c (IspQ), A Putative Redox Sensor

Screening of a diversity-oriented compound library led to the identification of two 6,11-dioxobenzo[f]pyrido[1,2-a]indoles (DBPI) that displayed low micromolar bactericidal activity against the Erdman strain of Mycobacterium tuberculosis in vitro. The activity of these hit compounds was limited to tubercle bacilli, including the nonreplicating form, and to Mycobacterium marinum. On hit expansion and investigation of the structure activity relationship, selected modifications to the dioxo moiety of the DBPI scaffold were either neutral or led to reduction or abolition of antimycobacterial activity. To find the target, DBPI-resistant mutants of M. tuberculosis Erdman were raised and characterized first microbiologically and then by whole genome sequencing. Four different mutations, all affecting highly conserved residues, were uncovered in the essential gene rv0338c (ispQ) that encodes a membrane-bound protein, named IspQ, with 2Fe-2S and 4Fe-4S centers and putative iron-sulfur-binding reductase activity. With the help of a structural model, two of the mutations were localized close to the 2Fe-2S domain in IspQ and another in transmembrane segment 3. The mutant genes were recessive to the wild type in complementation experiments and further confirmation of the hit-target relationship was obtained using a conditional knockdown mutant of rv0338c in M. tuberculosis H37Rv. More mechanistic insight was obtained from transcriptome analysis, following exposure of M. tuberculosis to two different DBPI; this revealed strong upregulation of the redox-sensitive SigK regulon and genes induced by oxidative and thiol-stress. The findings of this investigation pharmacologically validate a novel target in tubercle bacilli and open a new vista for tuberculosis drug discovery.

Synthesis of benzonaphthofuroquinones and benzoylnaphthindolizinediones by reactions of flavonoids with dichlone under basylous, oxygenous and aqueous conditions: Their cytotoxic and apoptotic activities

Using flavonoids and dichlone as substrates, benzonaphthofuroquinones (1, 2, 3, 5, 6, novel; 4 new) and benzoylnaphthindolizinediones (7, 8, known; 9, new) were synthesized through common base-catalyzed method and a new method of combining base-catalyzed with O2/H2O exposing. The possible reaction mechanisms may involve the process like isomerization, hydration, oxidation, decomposition and intermolecular condensation. Benzonaphthofuroquinones (2, 3, 4, 5) were found to exhibit potent cytotoxicity against carcinoma cell lines and low toxicity to normal cell lines. The compounds 4 and 5 not only expressed a significant late-stage-apoptosis against human leukemia and melanoma, but also promoted the cleavage of caspase-3 and PARP in human leukemia, which suggested that the late-stage-apoptosis and caspase-3 pathway may be responsible for the cytotoxicities of these benzonaphthofuroquinones. The replacement of the furan ring with pyrrole system in benzoylnaphthindolizinediones (7, 8, 9) resulted in the loss of anticancer activity.

Copper(II)-catalyzed synthesis of benzo[ f ]pyrido[1,2- a ]indole-6,11-dione derivatives via naphthoquinone difunctionalization reaction

Benzo[f]pyrido[1,2-a]indole-6,11-diones have been synthesized in high yields by copper(II)-catalyzed three-component reactions of acyl bromide, 1,4-naphthoquinone, and pyridine (or isoquinoline) via sp2-C-H difunctionalization of naphthoquinone

Synthesis of polycyclic indolizine derivatives via one-pot tandem reactions of N-ylides with dichloro substituted α,β-unsaturated carbonyl compounds

Convenient and regioselective syntheses of 1,2-annulated, and 1,2-, 5,6- and 1,2-, 7,8-bisannulated polycyclic indolizine derivatives have been achieved by one-pot tandem reactions of cyclic N-ylides derived from the corresponding N-substituted pyridinium

Synthesis of Naphthoindolizine-6,11-dione Derivatives by Iodine Oxidation of 2-Alkyl-1,4-naphthoquinones in the Presence of Substituted Pyridines

Iodine oxidation of 2-alkyl-1,4-naphthoquinones (1) in the presence of substituted pyridines (2) afforded naphthoindolizine-6,11-dione derivatives (3). Other oxidant systems (MnO2/I- or Fe(ClO4)3/I2) can be used and 2-alkylbenzoquinones