Process for producing (8- chloro-3,10- dibromo-6,11-...

C - Chemistry – Metallurgy – 07 – D

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C07D 401/04 (2006.01) A61K 31/44 (2006.01) C07B 35/02 (2006.01) C07B 55/00 (2006.01) C07B 57/00 (2006.01) C07D 401/14 (2006.01)

Patent

CA 2335967

A process for producing compounds of formula (1.0) is disclosed. The compound of formula (1.0) is produced by: (1) separating the atropisomers of (2.0) to obtain the atropisomers (2.0A) and (2.0B); (2) heating the atropisomer of formula (2.0B) at a suitable temperature in a suitable solvent to obtain a mixture of atropisomers of formulas (2.0A) and (2.0B); (3) separating the atropisomers of formulas (2.0A) and (2.0B) of step (2); and (4) reducing the atropisomer of formula (2.0A) to obtain a compound of formula (1.0). Preferably, R1 is Br, R2 is Cl and R3 is Br. Also disclosed is the (+)- atropisomer of formula (2.0) wherein R1 is Br, R2 is Cl and R3 is Br.

L'invention concerne un procédé permettant de produire des composés de formule (1.0). Pour produire le composé de formule (1.0), 1) on sépare les énantiomorphes de formule (2.0) de façon à obtenir les énantiomorphes de formules (2.0A) et (2.0B); 2) on chauffe l'énantiomorphe de formule (2.0B) à une température appropriée, dans un solvant approprié, de façon à obtenir un mélange d'énantiomorphes de formules (2.0A) et (2.0B); 3) on sépare les énantiomorphes (2.0A) et (2.0B) obtenus à l'étape 2); et 4) on réduit l'énantiomorphe de formule (2.0A) de façon à obtenir un composé de formule (1.0). De préférence, R?1¿ est Br, R?2¿ est Cl et R?3¿ est Br. L'invention concerne également l'énantiomorphe (+) de formule (2.0), dans laquelle R?1¿ est Br, R?2¿ est Cl et R?3¿ est Br.

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