摘要:
A process for purifying Rufinamide, comprising: a) providing a dispersion of crude 1-[(2,6-difluorophenyl)methyl]-1H-1,2,3-triazole-4-carboxamide in a solvent mixture containing at least a carboxylic acid, and dissolving it; b) slowly cooling the solution to precipitate Rufinamide crystalline form A; and c) recovering the solid.
摘要:
A process for the preparation of a compound of formula (I), comprising:a) the reaction of a compound of formula (II) with hydrazine to obtain a compound of formula (III), b) the conversion of a compound of formula (III) by rearrangement via formation of nitrene/isocyanate, in a solvent of formula R1—OH, wherein R1 is as herein defined, to obtain a compound of formula (IV); c) the enantiomeric enrichment of a compound of formula (IV) to obtain the enantiomer (S) of a compound of formula (V) d) the hydrolysis of a compound of formula (V).
摘要:
A process for the preparation of a compound of formula (I) is disclosed, which comprises: a) the reaction of a compound of formula (II) with zinc azide of formula (III) Zn(N3)2 (III) in the presence of a solvent of formula R1—OH, wherein R1 is herein defined, to obtain a compound of formula (IV), b) its conversion into a compound of formula (V); c) its enantiomeric enrichment to obtain the (S) enantiomer of formula (VI); and d) the hydrolysis thereof.
摘要:
A process for the preparation of a compound of formula (I) is disclosed, which comprises: a) the reaction of a compound of formula (II) with zinc azide of formula (III) Zn(N3)2 (III) in the presence of a solvent of formula R1—OH, wherein R1 is herein defined, to obtain a compound of formula (IV), b) its conversion into a compound of formula (V); c) its enantiomeric enrichment to obtain the (S) enantiomer of formula (VI); and d) the hydrolysis thereof.
摘要:
A process for the preparation of (S)(+)-3-(aminomethyl)-5-methylhexanoic acid (pregabalin) of formula (I) or a salt thereof, comprising the reaction of a compound of formula (II) with an alcohol ROH, in the presence or absence of enzyme, to give a compound of formula (III) as herein defined the transformation of a compound of formula (III) into a compound of formula (VI) or (VIII) as herein defined, and the subsequent hydrolysis of a compound of formula (VI) or (VIII), to give pregabalin.