206446-47-1Relevant articles and documents
Organophotoredox/palladium dual catalytic decarboxylative Csp3-Csp3coupling of carboxylic acids and π-electrophiles
Cartwright, Kaitie C.,Tunge, Jon A.
, p. 8167 - 8175 (2020/09/09)
A dual catalytic decarboxylative allylation and benzylation method for the construction of new C(sp3)-C(sp3) bonds between readily available carboxylic acids and functionally diverse carbonate electrophiles has been developed. The new process is mild, operationally simple, and has greatly improved upon the efficiency and generality of previous methodology. In addition, new insights into the reaction mechanism have been realized and provide further understanding of the harnessed reactivity.
Aminoalkyl radicals as halogen-atom transfer agents for activation of alkyl and aryl halides
Constantin, Timothée,Juliá, Fabio,Leonori, Daniele,Regni, Alessio,Sheikh, Nadeem S.,Zanini, Margherita
, p. 1021 - 1026 (2020/03/10)
Organic halides are important building blocks in synthesis, but their use in (photo)redox chemistry is limited by their low reduction potentials. Halogen-atom transfer remains the most reliable approach to exploit these substrates in radical processes despite its requirement for hazardous reagents and initiators such as tributyltin hydride. In this study, we demonstrate that a-aminoalkyl radicals, easily accessible from simple amines, promote the homolytic activation of carbon-halogen bonds with a reactivity profile mirroring that of classical tin radicals. This strategy conveniently engages alkyl and aryl halides in a wide range of redox transformations to construct sp3-sp3, sp3-sp2, and sp2-sp2 carbon-carbon bonds under mild conditions with high chemoselectivity.
Cobalt-Catalyzed Cross-Coupling of 3- and 4-Iodopiperidines with Grignard Reagents
Gonnard, Laurine,Gurinot, Amandine,Cossy, Janine
supporting information, p. 12797 - 12803 (2015/09/01)
A cobalt-catalyzed cross-coupling between 3- and 4-iodopiperidines and Grignard reagents is disclosed. The reaction is an efficient, cheap, chemoselective, and flexible way to functionalize piperidines. This coupling was used as the key step to realize a short synthesis of (±)-preclamol. Some mechanistic investigations were conducted that highlight the formation of radical intermediates. Scaffold synthesis: A cobalt-catalyzed cross-coupling between iodopiperidines and Grignard reagents is reported (see scheme; PG=protecting group). A large variety of 3- and 4-substituted piperidines were synthesized and the method was applied to a short synthesis of (±)-preclamol. This work constitutes one of the rare examples of cross-couplings involving 3-halogeno piperidines.
Biphilic organophosphorus catalysis: Regioselective reductive transposition of allylic bromides via PIII/PV redox cycling
Reichl, Kyle D.,Dunn, Nicole L.,Fastuca, Nicholas J.,Radosevich, Alexander T.
supporting information, p. 5292 - 5295 (2015/05/13)
We report that a regioselective reductive transposition of primary allylic bromides is catalyzed by a biphilic organophosphorus (phosphetane) catalyst. Spectroscopic evidence supports the formation of a pentacoordinate (σ5-P) hydridophosphorane as a key reactive intermediate. Kinetics experiments and computational modeling are consistent with a unimolecular decomposition of the σ5-P hydridophosphorane via a concerted cyclic transition structure that delivers the observed allylic transposition and completes a novel PIII/PV redox catalytic cycle. These results broaden the growing repertoire of reactions catalyzed within the PIII/PV redox couple and suggest additional opportunities for organophosphorus catalysis in a biphilic mode.
Lead optimization of a pyrazole sulfonamide series of trypanosoma brucei N -myristoyltransferase inhibitors: Identification and evaluation of CNS penetrant compounds as potential treatments for stage 2 human african trypanosomiasis
Brand, Stephen,Norcross, Neil R.,Thompson, Stephen,Harrison, Justin R.,Smith, Victoria C.,Robinson, David A.,Torrie, Leah S.,McElroy, Stuart P.,Hallyburton, Irene,Norval, Suzanne,Scullion, Paul,Stojanovski, Laste,Simeons, Frederick R. C.,Van Aalten, Daan,Frearson, Julie A.,Brenk, Ruth,Fairlamb, Alan H.,Ferguson, Michael A. J.,Wyatt, Paul G.,Gilbert, Ian H.,Read, Kevin D.
supporting information, p. 9855 - 9869 (2015/02/05)
Trypanosoma brucei N-myristoyltransferase (TbNMT) is an attractive therapeutic target for the treatment of human African trypanosomiasis (HAT). From previous studies, we identified pyrazole sulfonamide, DDD85646 (1), a potent inhibitor of TbNMT. Although this compound represents an excellent lead, poor central nervous system (CNS) exposure restricts its use to the hemolymphatic form (stage 1) of the disease. With a clear clinical need for new drug treatments for HAT that address both the hemolymphatic and CNS stages of the disease, a chemistry campaign was initiated to address the shortfalls of this series. This paper describes modifications to the pyrazole sulfonamides which markedly improved blood-brain barrier permeability, achieved by reducing polar surface area and capping the sulfonamide. Moreover, replacing the core aromatic with a flexible linker significantly improved selectivity. This led to the discovery of DDD100097 (40) which demonstrated partial efficacy in a stage 2 (CNS) mouse model of HAT.
Isoxazolines as Therapeutic Agents
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Paragraph 0909, (2013/03/26)
The present invention provides compound of Formula (I) biologically active metabolites, pro-drugs, isomers, stereoisomers, solvates, hydrates and pharmaceutically acceptable salts thereof wherein the variables are defined herein. The compounds of the invention are useful for treating immunological conditions.
Bicyclic Benzimidazole Compounds and Their Use as Metabotropic Glutamate Receptor Potentiators
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Page/Page column 65, (2009/08/14)
Compounds of Formula I: wherein A, B, D, L, R1, R2, R3, R4, m, and n are as defined for Formula I in the description. The invention also relates to processes for the preparation of the compounds and to new intermediates employed in the preparation, pharmaceutical compositions containing the compounds, and to the use of the compounds in therapy.
Tricyclic benzimidazoles and their use as metabotropic glutamate receptor modulators
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Page/Page column 45, (2008/06/13)
The invention provides for a compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein R1, R2, R3, A, B, D, m, n, x, and y are defined as described in the specification. The invention additionally provides a pharmaceutically composition comprising the compound of formula I, together with a method of using the same to treat or prevent neurological and psychiatric disorders. The compounds are useful in therapy related to the treatment or prevention of mGluR2 receptor-mediated disorders.
ISOINDOLONE COMPOUNDS AND THEIR USE AS METABOTROPIC GLUTAMATE RECEPTOR POTENTIATORS
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Page/Page column 102, (2008/06/13)
The present invention is directed to compounds of formula (I), wherein R1 is a ring and n is a number from 1 to 8. The invention also relates to use of the compounds in therapy as metabotropic glutamate receptor modulators, particularly in neurological and psychiatric disorders.
N-(3-(4-substituted-1-piperidinyl)-1-phenylpropyl) substituted sulfonamides as NK-3 receptor antagonists
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Page/Page column 23, (2010/11/30)
The present invention provides a method of treatment of a subject suffering from a disease, such as schizophrenia, for which the administration of an NK-3 antagonist is indicated which comprises administering to that subject a therapeutically effective amount of a compound of formula I: wherein, generally, Q is R1 is benzyl, phenyl, thiophene or imidazolyl optionally substituted with C1-4alkyl or halogen, such as methyl, fluorine or bromine; R2 is hydrogen or C1-4alkyl such as methyl; R3 is phenyl; R4 is hydrogen; R5 is hydrogen or C1-6alkylcarbonyl such as methylcarbonyl; X is —SO2— or —C(O)N(R2)SO2— where R2 is preferably hydrogen; Y is a bond, CH2 or Z1 where Z1 is —N(Rf)— in which Rf is C1-6alkylcarbonyl such as ethylcarbonyl; and R6 is phenyl, pyrazolyl, pyridyl, pyrimidinyl or benzimidazolonyl optionally substituted with one or two groups chosen from C1-6alkyl and benzyl, such as methyl, ethyl and benzyl; or a pharmaceutically acceptable salt thereof.