518314-53-9Relevant articles and documents
Amine-Directed Palladium-Catalyzed C?H Halogenation of Phenylalanine Derivatives
Ville, Alexia,Annibaletto, Julien,Coufourier, Sébastien,Hoarau, Christophe,Tamion, Rodolphe,Journot, Guillaume,Schneider, Cédric,Brière, Jean-Fran?ois
, p. 13961 - 13965 (2021/09/14)
An efficient primary-amine-directed, palladium-catalyzed C?H halogenation (X=I, Br, Cl) of phenylalanine derivatives is reported on a range of quaternary amino acid (AA) derivatives thanks to suitable conditions employing trifluoroacetic acid as additive. The extension of this original native functionality-directed ortho-selective halogenation was even demonstrated with the more challenging native phenylalanine as tertiary AA.
Towards a universal organocatalyst for the synthesis of enantioenriched phenylalanine derivatives by enantioselective decarboxylative protonation
Pigeaux, Morgane,Laporte, Romain,Harrowven, David C.,Baudoux, Jér?me,Rouden, Jacques
supporting information, p. 4599 - 4603 (2016/09/23)
Access to enantioenriched non-proteogenic phenylalanine derivatives is described using the enantioselective decarboxylative protonation reaction of amidohemimalonate esters catalysed by various cinchona-based compounds. This study compares the catalytic efficiency as well as the enantioselectivity induced by three types of common organocatalysts, namely thioureas, squaramides and bis-cinchona squaramides. One of the main outcome of this work is the observation of a significant influence of the N-protecting group of the hemimalonate on its interaction with the catalyst. This methodology carried out under mild conditions exhibits good substrate scope and functional group tolerance. A substoichiometric amount of catalyst can also be used in certain cases while affording good yields and selectivities.
MINERALOCORTICOID RECEPTOR ANTAGONISTS
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Page/Page column 47, (2013/04/25)
The present invention is directed to compounds of the Formula (I) as well as pharmaceutically acceptable salts thereof, that are aldosterone receptor antagonists which might be useful for treating aldosterone-mediated diseases. The invention furthermore r