C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 59/76 (2006.01) A61K 31/445 (2006.01) C07C 69/738 (2006.01) C07D 211/22 (2006.01) C07D 211/70 (2006.01)
Patent
CA 2254506
The present invention relates to substantially pure regioisomer as shown below, wherein R3 is -COOH or -COOR4; R4 is an alkyl with 1 to 6 carbon atoms; A is a substituent of its rings which may be different or the same, and are selected from the group consisting of hydrogen, halogens, alkyl, hydroxy, or alkoxy. A process of preparing said substantially pure regioisomer is also disclosed.
La présente invention porte sur un régio-isomère pratiquement pur, comme il est illustré ci-dessous, où : R3 est -COOH ou -COOR4; R4 est un alkyle avec 1 à 6 atomes de carbone; A est un substituant de son cycle, choisi parmi un hydrogène, un halogène, un alkyle, un hydroxy ou un alcoxy. On divulgue également une méthode pour préparer ledit régio-isomère pratiquement pur.
Albany Molecular Research Inc.
Albany Moleculare Research Inc.
Gowling Lafleur Henderson Llp
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