An improved process for the preparation of...

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C - Chemistry, Metallurgy

07

D

C07D 471/04 (2006.01)

Patent

CA 2558245

The N-arylsulfilimine-catalyzed coupling of aromatic sulfonyl chlorides with N- ([1,2,4]triazolopyrimidin-2-yl)amines to form N-([1,2,4]triazolo~pyrimïdin-2- yl)aryl sulfonamides is improved by the selection of 3-picoline or 3,5~lutidirne as the base.

Selon l'invention, le couplage catalysé par N-arylsulfilimine de chlorures de sulfuryle aromatiques à des <I>N</I>-([1,2,4]triazolopyrimidine-2-yl)amines pour former des <I>N</I>-([1,2,4]triazolo-pyrimIdine-2-yl)arylsulfonamides est amélioré par sélection de 3-picoline ou de 3,5-lutidine en tant que base.

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