- NK1 receptor-targeting antagonist and application of same to chemotherapy-induced nausea and vomiting
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The invention relates to a NK1 receptor-targeting antagonist and application of the same to chemotherapy-induced nausea and vomiting, belonging to the technical field of adjuvant therapeutics for tumor chemotherapy. The invention provides a compound as shown in a formula I which is described in the specification, or a racemate, stereoisomer, tautomer, isotopic label, oxynitride or pharmaceutically-acceptable salt thereof. The invention also provides a preparation method for the compound, a pharmaceutical compositions and the application of the compound or the racemate, stereoisomer, tautomer,isotopic label, oxynitride or pharmaceutically-acceptable salt thereof.
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Paragraph 0107; 0109; 0111; 0112
(2019/03/15)
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- Deprotonation of pyridine carboxamides using lithium magnesiates bases
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Regioselective deprotonation of N-methyl- and tert-butylpyridine carboxamides using lithium magnesiates bases was achieved at room temperature avoiding nucleophilic addition on the pyridine molecule and auto-condensation of the arylmetal intermediates on
- Hawad, Ha?an,Bayh, Omar,Hoarau, Christophe,Trécourt, Francois,Quéguiner, Guy,Marsais, Francis
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p. 3236 - 3245
(2008/09/21)
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- Efficient synthesis of novel NK1 receptor antagonists: Selective 1,4-addition of Grignard reagents to 6-chloronicotinic acid derivatives
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A new efficient synthesis of two novel classes of NK1 receptor antagonists, among them befetupitant and netupitant, starting from 6-chloronicotinic acid is described. The introduction of the o-tolyl substituent at C(4) of the pyridine ring was achieved by a one-pot selective 1,4-Grignard addition/oxidation sequence to 6-chloronicotinic acid or a derivative of it. The scope of this addition/oxidation sequence was examined. It was also shown that the carboxylic function can be converted to a methyl amino group by a Hofmann rearrangement followed by reduction. Furthermore, a new high-yielding synthesis of 2-(3,5-bistrifluoromethylphenyl)-2-methyl propionic acid based on the carbonylation of the tertiary alcohol obtained by Grignard addition of 3,5-bis(trifluoromethyl)bromobenzene to acetone was established.
- Hoffmann-Emery, Fabienne,Hilpert, Hans,Scalone, Michelangelo,Waldmeier, Pius
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p. 2000 - 2008
(2007/10/03)
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- Research and development of an efficient process for the construction of the 2,4,5-substituted pyridines of NK-1 receptor antagonists
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Roche has identified a 2,4,5-trisubstituted pyridine template for a new class of potent NK1 receptor antagonists. Previous strategies for construction of the pyridine core of these NK-1 receptor antagonists involved functionalization of a 2,5-disubstituted pyridine. We now report on construction of the pyridine core from commodity components. Shestopalov reported the synthesis of trans-4′-aryl-5′-cyano-1′,2′,3′, 4′-tetrahydro-6′-hydroxy-2′-oxo-1,3′-bipyridinium inner salts from 1-(2-amino-2-oxo-ethyl)pyridinium chloride, aromatic aldehydes, and ethyl cyanoacetate in the presence of a base. Reaction of these salts with phosphorus oxychloride affords 4-aryl-3-cyano-2,6-dichloropyridines. These are efficiently converted to nicotinamide precursors of the Roche NK-1 receptor antagonists by regioselective displacement of one chlorine by an amine, hydrogenolysis of the remaining chlorine, and nitrile hydrolysis.
- Harrington, Peter J.,Johnston, Dave,Moorlag, Henk,Wong, Jim-Wah,Hodges, L. Mark,Harris, Les,McEwen, Gerald K.,Smallwood, Blair
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p. 1157 - 1166
(2012/12/23)
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- NEW CRYSTALLINE MODIFICATION OF 2-(3,5-BIS-TRIFLUOROMETHYL-PHENYL)-N-[6-(1,1-DIOXO-1λ6-THIOMORPHOLIN-4-YL)-4(4-FLUORO-2-METHYL-PHENYL)-PYRIDIN-3-YL]-N-METHYL-ISOBUTYRAMIDE
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The present invention relates to a new crystalline modification of 2-(3,5-bis-trifluoromethyl-phenyl)-N-[6-(1,1-dioxo-1λ6-thiomorpholin-4-yl)-4(4-fluoro-2-methyl-phenyl)-pyridin-3-yl]-N-methyl-isobutyramide characterized by the following X-ray
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Page/Page column 3
(2010/02/07)
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- Amide derivative
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A compound of the formula: wherein Ar is optionally substituted phenyl, etc.; n is 0, 1 or 2; R1is hydogen atom, optionally substituted alkyl, etc.; R2and R3are independently optionally substituted alkyl, etc.; R4and R5are independently hydrogen atom or optionally substituted alkyl; R6is hydrogen atom, hydroxy or alkyl; or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders and the like.
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- Process for the preparation of pyridine derivatives
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A process is described for preparing certain 4-alkyl- or 4-aryl-pyridine derivatives.
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- 4-phenyl-pyridine derivatives
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The compounds of the related invention are related to 4-phenyl-pyridine derivatives connected by a bridge containing oxygen or nitrogen to a phenyl derivative.
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