Patent ID: 11858901
Assignee: MOEHS IBéRICA, S.L.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 22:
23. A process for preparing elagolix sodium (V) comprising:
a) reacting the compound of formula (I) or a salt thereof according to claim 1 with 2-fluoro-3-methoxyphenylboronic acid (VI) in the presence of a palladium catalyst, a phosphine-type ligand, and a base to give 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione (VII), optionally performing b1) to b3):
b1) treating the 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione (VII) with HCl to give 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione hydrochloride (VIIa), b2) isolating the 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione hydrochloride (VIIa); and
b3) treating the 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione hydrochloride (VIIa) with a base to give 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione (VII);
c) reacting the 3-((R)-2-(amino-2-phenylethyl)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-trifluoromethylbenzyl)-6-methyl-1H-pyrimidine-2,4-dione (VII) obtained in said a) or in said b3) with a C1-4 alkyl 4-halobutyrate to obtain a compound of formula (VIII), wherein R represents a C1-4 alkyl group; and
d) hydrolyzing the ester group of the compound of formula (VIII) by treatment with NaOH to obtain elagolix sodium (V),