PREPARATION OF NOVEL SUBSTITUTED HALOARENE COMPOUNDS

This invention relates to a new process for the preparation of novel substituted haloarenecompounds of the formula I or IV: respectively, wherein R1, R2,R3, R4, R5, X, and Y are as defined herein, thatcomprises a novel and efficient selective mono-lithiation of a dihaloareneof the formula II or V: r...

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Bibliographic Details
Main Authors JENNIFER LEA RUTHERFORD, JOEL MICHAEL HAWKINS
Format Patent
LanguageEnglish
Spanish
Published 07.03.2007
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Summary:This invention relates to a new process for the preparation of novel substituted haloarenecompounds of the formula I or IV: respectively, wherein R1, R2,R3, R4, R5, X, and Y are as defined herein, thatcomprises a novel and efficient selective mono-lithiation of a dihaloareneof the formula II or V: respectively, by an organo-lithium compound in the presenceof a carbonyl reactant of the formula III: wherein R1 and R2are as defined herein. In the process of the instant invention, the newly formedlithiated haloarene is sequentially quenched in situ by the carbonylreactant to form said substituted haloarene. The process is suitable for batchor continuous flow systems. The substituted haloarenes produced by the processof the present invention are useful intermediates in the preparation of N-arylor N-heteroaryl substituted pharmaceutically active compounds that includeselective antagonists, inverse agonists and partial agonists of serotonin 1(5-HT1) receptors useful in treating or preventing depression, anxiety,obsessive compulsive disorder (OCD) and other disorders for which a 5-HT1agonist or antagonist is indicated. Esta invencion se refiere a un procedimiento novedoso para la preparacion de compuestos de haloareno sustituido novedosos de la formula l o IV: respectivamente, en los que R1, R2, R3, R4, R5, X e Y son tal como se definen en la presente memoria, que comprende una monolitiacion selectiva novedosa y eficaz de un dihaloareno de la formula II o V: respectivamente, mediante un compuesto de organolitio en presencia de un reactivo de carbonilo de la formula III: en el que R1 y R2 son tal como se definen en la presente memoria. En el procedimiento de la presente invencion, el haloareno litiado recien formado e inactiva secuencialmente in situ mediante el reactivo de carbonilo formando dicho haloareno sustituido. El procedimiento es adecuado para sistemas de flujo discontinuo o continuo. Los haloarenos sustituidos producidos mediante el procedimiento de la presente invencion son intermedios utiles en la preparacion de compuestos farmaceuticamente activos N-arilo o N-heteroarilo sustituidos que incluyen antagonistas, agonistas inversos y agonistas parciales selectivos de los receptores de serotonina 1 (5-HT1) de utilidad en el tratamiento o prevencion de depresion, ansiedad, trastorno obsesivo compulsivo (OCD) y otros trastornos para los que esta indicado un agonista o antagonista de 5-HT1.
Bibliography:Application Number: MX20070000527