- Stereoselective Cascade Cyclizations with Samarium Diiodide to Tetracyclic Indolines: Precursors of Fluorostrychnines and Brucine
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A series of γ-indolylketones with fluorine, cyano or alkoxy substituents at the benzene moiety was prepared and subjected to samarium diiodide-promoted cyclization reactions. The desired dearomatizing ketyl cascade reaction forming two new rings proceeded
- Beemelmanns, Christine,Nitsch, Dominik,Bentz, Christoph,Reissig, Hans-Ulrich
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supporting information
p. 8780 - 8789
(2019/06/17)
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- A method for the preparation of indole compounds and use thereof (by machine translation)
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A method for the preparation of indole compounds and its application, relates to the field of organic synthesis, the preparation method by aniline compound with ethylene oxide in the 1st under the action of catalyst reaction to obtain N - hydroxy ethyl aniline compound, then the N - hydroxy ethyl aniline compound with the aniline of the compounds in the 2nd reaction under the action of catalyst preparation indole compounds. The preparation method step is simple, requires only two-step reaction can efficiently yield to obtain the indole compound, its route is reasonable in design, simple steps, easy operation, low cost, and is suitable for industrial mass production. The preparation method is applied to the preparation of pharmaceutical in the indole structure, can improve the yield of the medicament, the medicine of the large-scale production. (by machine translation)
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Paragraph 0070-0075
(2018/04/01)
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- Synthesis of 7-halo indoles (by machine translation)
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The present invention relates to synthesis of 7? Halo indole method, comprising the steps of:O-halogenated aniline, chloral hydrate and hydroxylamine hydrochloride by the Sandmeyer reaction to synthesize 7? halogenating isatin ; 7? halogenating isatin dissolved with an organic solvent, in the reducing agent by reduction reaction under the conditions of 7? Halo indole, the reducing agent is an alkali metal borohydride system, four system adopts, lithium hydride system or triethyl silane system. The beneficial effect of the invention is:in order to O-halogenated aniline and the chloral hydrate is, hydroxylamine hydrochloride as raw materials, by the Sandmeyer shall synthesis method for preparing compositions b isonitroso 7? halogenating isatin, and then by further reduction and system reduction to prepare 7? Halo indole; by the 7? Preparation halogenating isatin 7? Halo indole method, the raw material is easy to obtain, low price, higher process yield, the product purity is good, simple operation, and the like, is suitable for batch preparation 7? Halo indole. (by machine translation)
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Paragraph 0016; 0019
(2017/01/12)
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- INDOLE DERIVATIVES AS CRTH2 RECEPTOR ANTAGONISTS
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Compound of formula I are antagonists of the PGD2 receptor, CRTH2, and as such are useful in the treatment and/or prevention of CRTH2-mediated diseases such as asthma.
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Page/Page column 43
(2010/04/25)
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- Palladium-catalyzed annulation of haloanilines and halobenzamides using norbornadiene as an acetylene synthon: A route to functionalized indolines, isoquinolinones, and indoles
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A general procedure for the palladium-catalyzed annulation of substituted haloanilines with norbornadiene gives functionalized indolines in 51-98% yield. These indolines can be rapidly converted to benzenoid- substituted indoles and tricyclic indolines. Extension to the use of substituted halobenzamides gives functionalized isoquinolinones in up to 86% yield.
- Thansandote, Praew,Hulcoop, David G.,Langer, Michael,Lautens, Mark
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supporting information; experimental part
p. 1673 - 1678
(2009/07/17)
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- PIPERIDINYLHYDROXYETHYLPIPERIDINES AS MODULATORS OF CHEMOKINE RECEPTORS
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The present invention relates to a compound of the formula (I), or a pharmaceutically acceptable salt thereof, wherein R1-R8 and X, m, and n are defined. Compounds and compositions of the present invention are useful the treatment of atherosclerosis.
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Page/Page column 23
(2009/05/28)
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- In search of simplicity and flexibility: A rational access to twelve fluoroindolecarboxylic acids
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All twelve indolecarboxylic acids 1-12 carrying both a fluorine substituent and a carboxy group at the benzo ring have been prepared either directly from the corresponding fluoroindoles 13-16 or from the chlorinated derivatives 22, 23 and 25 by hydrogen/metal permutation ("metalation"), or from the bromo- or iodofluoroindoles 17-20 and 26, 27, 29 and 30 by halogen/metal permutation, the organometallic intermediate being each time trapped with carbon dioxide. In most, though not all cases, the nitrogen atom in the five-membered ring had to be protected by a trialkylsilyl group. Some of the bromo- or iodofluoroindoles (26 and 27) were successfully subjected to a basicity gradient-driven selective migration of the heavy halogen. An unexpected finding on the way to the target compounds were the rigorously site-selective metalation of the 5-fluoro-N-(trialkylsilyl)indole (14b; exclusive deprotonation of the 4-position). The fluoroindoles 13-16, although previously known, were accessed more conveniently from suitably substituted nitrobenzenes using the Bartoli or the Leimgruber-Batcho method. A new and very attractive indole synthesis was elaborated consisting of the ortho-lithiation of an N-acyl-protected aniline followed by ortho-formylation, Wittig chloromethylenation and base-catalyzed cyclization accompanied by dehydrochlorination. These five consecutive steps can be contracted to a convenient one-pot protocol. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
- Schlosser, Manfred,Ginanneschi, Assunta,Leroux, Frederic
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p. 2956 - 2969
(2007/10/03)
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- Benzothiadiazinyl-indole derivatives and their use as serotonin receptor ligands
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Compounds having the formula: in which n is 1 or 2, m is 1 or 2, p is 1 to 6, q is 0 or 1 to 3, R1and R2are each hydrogen or C1-4alkyl, R3, R4and R5are each hydrogen, C1-4alkyl, optionally substituted phenyl or optionally substituted phenyl-C1-4alkyl, or R3and R4together form an alkylene link of formula -(CH2)3- or -(CH2)4-, or R4and R5together with the carbon atom to which they are attached form a C3-6cycloalkyl group, R6is C1-4alkyl, C1-4alkoxy, carboxy, hydroxy, cyano, halo, trifluoromethyl, nitro or amino, the dotted line represents an optional double bond, and the fluorine atom is attached at the 6 or 7-position; and salts and esters thereof, are binding to the 5-HT serotonin receptor and are useful in the treatment of CNS disorders.
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- 1H-2,1,3-benzothiadiazine-2,2-dioxide compounds or derivatives thereof
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A pharmaceutical compound having the formula: STR1 in which n is 1 or 2, m is 1 or 2, p is 1 to 6, q is 0 or 1 to 3, R1 and R2 are each hydrogen or C1-4 alkyl, R3, R4 and R5 are each hydrogen, C1-4 alkyl, optionally substituted phenyl or optionally substituted phenyl-C1-4 alkyl, or R3 and R4 together form an alkylene link of formula --(CH2)3 -- or --(CH2)4 --, or R4 and R5 together with the carbon atom to which they are attached form a C3-6 cycloalkyl group, R6 is C1-4 alkyl, C1-4 alkoxy, carboxy, hydroxy, cyano, halo, trifluoromethyl, nitro or amino, the dotted line represents an optional double bond, and the fluorine atom is attached at the 6 or 7-position; and salts and esters thereof.
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