- Synthesis of Pyrido[2,3-b]indole Derivatives via Rhodium-Catalyzed Cyclization of Indoles and 1-Sulfonyl-1,2,3-triazoles
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Acyloxy-substituted α,β-unsaturated imines generated in situ from triazoles can act as aza-[4 C] synthons and be trapped by indoles in a stepwise [4 + 2] cycloaddition reaction, thus providing rapid access to valuable pyrido[2,3-b]indoles in high yields. Attractive features of this reaction system include operational simplicity, readily available substrates, construction of sterically demanding quaternary centers, and convenient derivatization using triflate. (Figure presented.).
- An, Yuehui,Chen, Yidian,Duan, Shengguo,Li, Chuan-Ying,Xu, Ze-Feng,Xue, Bing,Zhang, Wan
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supporting information
(2020/04/22)
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- NOVEL COMPOUNDS AND THEIR USES AS THYROID HORMONE RECEPTOR AGONISTS
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A compound of formula (I) or (Ia), or a tautomer or a pharmaceutically acceptable salt thereof is provided. Compounds of formula (II) to (V), or a tautomer or a pharmaceutically acceptable salt thereof are also provided. These compounds and the pharmaceutical compositions containing them are useful for the treatment of diseases such as obesity, hyperlipidemia, hypercholesterolemia and diabetes and other related disorders and diseases, and may be useful for other diseases such as NASH, atherosclerosis, cardiovascular diseases, hypothyroidism, thyroid cancer and other disorders and diseases related thereto. (I), (Ia)
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Page/Page column 58
(2020/09/08)
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- N-Alkylation-Initiated Redox-Neutral [5 + 2] Annulation of 3-Alkylindoles with o-Aminobenzaldehydes: Access to Indole-1,2-Fused 1,4-Benzodiazepines
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Described herein is an unprecedented N-Alkylation-initiated redox-neutral [5 + 2] annulation of 3-Alkylindoles with o-Aminobenzaldehydes via a cascade N-Alkylation/dehydration/[1,5]-hydride transfer/Friedel-Crafts alkylation sequence. A series of indole-1,2-fused 1,4-benzodiazepines are facilely constructed in moderate to good yields in one step. This protocol features excellent regioselectivity, metal-free conditions, high step economy, and wide substrate scope.
- Wang, Shuai,Shen, Yao-Bin,Li, Long-Fei,Qiu, Bin,Yu, Liping,Liu, Qing,Xiao, Jian
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supporting information
p. 8904 - 8908
(2019/11/19)
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- C4 Pictet-Spengler Reactions for the Synthesis of Core Structures in Hyrtiazepine Alkaloids
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The hyrtiazepine alkaloids are a family of bisindole natural products that have the azepinoindole backbone. We developed a biomimetic approach by constructing the azepinoindole core in a one-pot manner through 1,4-diazabicyclo[2.2.2]octane/2,2,2-trifluoroethanol (DABCO/TFE) promoted Pictet-Spengler reaction onto the C-4 position of tryptophan. This strategy allowed the synthesis of common key structures of these families. The key intermediate can be converted into the 3 H -pyrano[2,3- b:5,6- e ′]diindol intermediate present in hyrtimomines A and B, as well as the azepinoindole core present in fargesine..
- Abe, Takumi,Haruyama, Tomohiro,Yamada, Koji
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p. 4141 - 4150
(2017/09/13)
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- Palladium-catalyzed C-H ethoxycarbonyldifluoromethylation of electron-rich heteroarenes
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The first Pd-catalyzed C-H ethoxycarbonyldifluoromethylation with BrCF2CO2Et has been developed. The use of a bidentate phosphine ligand (Xantphos) is critical for the reaction to occur. A variety of electron-rich heteroarenes, including indoles, furans, thiophenes, and pyrroles, can be ethoxycarbonyldifluoromethylated in moderate to excellent yields. The reactions take place at the C-H bonds adjacent to the heteroatoms with high regioselectivity. This method provides a new protocol for the introduction of difuoroalkyl groups into electron-rich heteroarenes.
- Shao, Changdong,Shi, Guangfa,Zhang, Yanghui,Pan, Shulei,Guan, Xiaohong
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supporting information
p. 2652 - 2655
(2015/06/16)
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- Highly enantioselective Friedel-Crafts alkylation/N-hemiacetalization cascade reaction with indoles
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A new ring for your indole: An unprecedented copper-catalyzed enantioselective Friedel-Crafts alkylation/N-hemiacetalization cascade reaction with indoles and β,γ-unsaturated α-ketoesters is reported. This mild strategy provides new access to various synthetically and biologically important 2,3-dihydro-1H-pyrrolo[1,2-a]indoles in a highly enantioselective manner.
- Cheng, Hong-Gang,Lu, Liang-Qiu,Wang, Tao,Yang, Qing-Qing,Liu, Xiao-Peng,Li, Yang,Deng, Qiao-Hui,Chen, Jia-Rong,Xiao, Wen-Jing
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supporting information
p. 3250 - 3254
(2013/04/10)
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- Synthesis of indolyl-3-acetonitrile derivatives and their inhibitory effects on nitric oxide and PGE2 productions in LPS-induced RAW 264.7 cells
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Arvelexin is one of major constituents of Brassica rapa that exerts anti-inflammatory activities. Several indolyl-3-acetonitrile derivatives were synthesized as arvelexin analogs and evaluated for their abilities to inhibit NO and PGE2 productions in LPS-induced RAW 264.7 cells. Of the indolyl-3-acetonitriles synthesized, compound 2k, which possesses a hydroxyl group at C-7 position of the indole ring and an N-methyl substituent, more potently inhibited NO and PGE2 productions and was less cytotoxic than arvelexin on macrophage cells.
- Kwon, Tae Hoon,Yoon, Ik Hwan,Shin, Ji-Sun,Lee, Young Hun,Kwon, Bong Jin,Lee, Kyung-Tae,Lee, Yong Sup
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p. 2571 - 2574
(2013/07/04)
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- INDOLE, INDOLINE DERIVATIVES, COMPOSITIONS COMPRISING THEM AND USES THEREOF
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The invention provides indole and indoline derivatives and slats thereof, compositions comprising them and uses thereof for the treatment of diseases and disorders.
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Page/Page column 25; 32; 33; 98; 99
(2013/10/22)
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- Novel benzofuran-3-one indole inhibitors of PI3 kinase-α and the mammalian target of rapamycin: Hit to lead studies
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A series of benzofuran-3-one indole phosphatidylinositol-3-kinases (PI3K) inhibitors identified via HTS has been prepared. The optimized inhibitors possess single digit nanomolar activity against p110α (PI3K-α), good pharmaceutical properties, selectivity versus p110γ (PI3K-γ), and tunable selectivity versus the mammalian target of rapamycin (mTOR). Modeling of compounds 9 and 32 in homology models of PI3K-α and mTOR supports the proposed rationale for selectivity. Compounds show activity in multiple cellular proliferation assays with signaling through the PI3K pathway confirmed via phospho-Akt inhibition in PC-3 cells.
- Bursavich, Matthew G.,Brooijmans, Natasja,Feldberg, Lawrence,Hollander, Irwin,Kim, Stephen,Lombardi, Sabrina,Park, Kaapjoo,Mallon, Robert,Gilbert, Adam M.
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scheme or table
p. 2586 - 2590
(2010/06/19)
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- Convenient synthetic method for 3-(3-substituted indol-2-yl)quinoxalin-2- ones as VEGF inhibitor
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It has already been reported that 3-(indol-2-yl)quinoxalin-2-ones 1)? have a potent inhibitory effect on the growth of tumor cells based on anti-angiogenesis activity. We have also carried out a structure-activity relationship (SAR) study of 3-(indol-2-yl)quinoxalin-2-ones, which showed a potent inhibitory activity toward the vascular endothelial growth factor (VEGF)-induced proliferation of human mesangial cells and the VEGF-induced auto-phosphorylation of human umbilical vein endothelial cells.2) Moreover, one of these compounds has a potent medicinal effect based on anti-angiogenic action, by oral administration2) (Chart 1, 9). However, since the existing synthetic methods1) for the preparation of 3-(indol-2-yl)quinoxalin-2-ones consist of multiple steps some of which require strict anhydrous conditions, a convenient and simple synthetic method in place of the existing method is desirable. As a result of the investigations into the synthetic procedures, 3-(3-substituted indol-2-yl)quinoxalin-2-ones can be easily prepared by the condensation of 3-substituted indoles with quinoxalin-2-ones in the presence of trifluoroacetic acid (TFA). Herein, we report the examination of these reaction conditions and the application of this new synthetic method to the synthesis of the derivatives as VEGF inhibitors.
- Aoki, Katsuyuki,Koseki, Jyun-Ichi,Takeda, Shuichi,Aburada, Masaki,Miyamoto, Ken-Ichi
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p. 922 - 925
(2008/02/09)
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- Fused [d]pyridazin-7-ones
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The present invention is directed to fused [d]pyridazin-7-ones. The invention is also directed to methods for making and using the fused [d]pyridazin-7-ones. In particular, the compounds of the present invention may be effective in the treatment of diseases or disease states related to the activity of VEGFR2, MLK1 and CDK5 enzymes, including, for example, angiogenic disorders and neurodegenerative diseases.
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Page/Page column 17
(2008/06/13)
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- THERAPEUTIC AGENTS I
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Compounds of formula(I), processes for preparing such compounds, their use in the treatment of obesity, psychiatric disorders, cognitive disorders, memory disorders, schizophrenia, epilepsy, and related conditions, and neurological disorders such as dementia, multiple sclerosis, Parkinson's disease, Huntington's chorea and Alzheimer's disease and pain related disorders, and pharmaceutical compositions containing them.
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Page/Page column 90-91
(2010/02/12)
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- ((((1H-INDOL-3YL) METHYLIDENE)AMINO)OXY)ACETIC ACID DERIVATIVES AND RELATED COMPOUNDS AS PAI-1 INHIBITORS FOR THE TREATMENT OF INPAIREMENT OF THE FIBRINOLYTIC SYSTEM AND OF THROMBOSIS
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The present invention relates to indole oxime derivatives of formula (I) wherein: R1 is -OH, -OC1-C8 alkyl, or NH2; R2and R3 are, independently, hydrogen, C1-C8 alkyl, -CH2-C3-C6 cycloalkyl, -CH2-pyridinyl, phenyl, or benzyl; R4 is hydrogen, C1-C8 alkyl, C3-C6 cycloalkyl, -CH2-C3-C6cycloalkyl, phenyl, benzyl, heteroaryl, or -CH2-heteoraryl; X is: formula (II), (III), (IV) or (V).The other substituents are defined in claim 1. The present compounds are PAI-1 inhibitors for the treatment of e.g. impairment of the fibrinolytic system, thrombosis or cardiovascular diseases.
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Page/Page column 41
(2008/06/13)
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- Pyrroloindoles, pyridoindoles and azepinoindoles as 5-ht2c agonists
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A chemical compound of formula (I), wherein n is 1, 2 or 3; R1and R2are independently selected from hydrogen and alkyl; R3is alkyl; R4to R7are independently selected from hydrogen, halogen, hydroxy, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, alkylsulfoxyl, alkylsulfonyl, arylsulfoxyl, arylsulfonyl, amino, monoalkylamino, dialkylamino, nitro, cyano, carboxaldehyde, alkylcarbonyl, arylcarbonyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, alkoxycarbonylamino, aminocarbonyloxy, monoalkylaminocarbonyloxy, dialkylaminocarbonyloxy, monoalkylaminocarbonylamino and dialkylaminocarbonylamino, or R5and R6together form a carbocyclic or heterocyclic ring, and pharmaceutically acceptable salts and prodrugs thereof, and the use thereof in therapy, particularly for the treatment of disorders of the central nervous system; damage to the central nervous system; cardiovascular disorders; gastrointestinal disorders, diabetes insipidus, and sleep apnea, and particularly for the treatment of obesity
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- The serotonin 5-HT4 receptor. 2. Structure-activity studies of the indole carbazimidamide class of agonists.
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A number of substituted indole carbazimidamides were prepared and evaluated as 5-HT4 receptor agonists by using the isolated field-stimulated guinea pig ileum preparation. Their selectivity for the 5-HT4 receptor was established by examining their affinity for other 5-HT receptors using radioligand-binding techniques. Several selective and highly potent full as well as partial agonists emerged from this study. For example, 1b,d were found to be the most potent, full 5-HT4 receptor agonist described so far (EC50 = 0.5 and 0.8 nM, respectively), being 6 and 4 times more potent than serotonin itself. On the other hand, 5b and 1h appeared as partial 5-HT4 receptor agonists in the nonstimulated guinea pig ileum preparation with potencies, evaluated against serotonin action, respectively similar (5b, Ki = 12 nM) to and 300-fold higher (1h, Ki = 0.04 nM) than serotonin.
- Buchheit,Gamse,Giger,Hoyer,Klein,Kloeppner,Pfannkuche,Mattes
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p. 2331 - 2338
(2007/10/02)
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