PROCESS FOR THE PREPARATION OF AN INTERMEDIATE FOR A TRIAZOLOPYRIMIDINE CARBONUCLEOSIDE
申请人:ENANTIA, S.L.
公开号:US20150152114A1
公开(公告)日:2015-06-04
A process for the preparation of 4,6-dihalopyrimidin-5-amines of formula (II), or salts thereof, which comprises reacting 5-aminopyrimidin-4,6-diols of formula (III), or salts thereof, or a solvate either of the compound of formula (III) or of a salt thereof, with a halogenating agent, new intermediates useful in the preparation of the compound of formula (II) and processes for the preparation of these intermediates. The invention also refers to a process for the preparation of ticagrelor or a pharmaceutically acceptable salt thereof from 4,6-dihalo-2-(propylthio)pyrimidin-5-amine of formula (IIA).
[EN] A PROCESS FOR THE PREPARATION OF AN INTERMEDIATE FOR A TRIAZOLOPYRIMIDINE CARBONUCLEOSIDE<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'UN INTERMÉDIAIRE POUR UN CARBONUCLÉOSIDE DE TRIAZOLOPYRIMIDINE
申请人:ENANTIA S L
公开号:WO2014023681A1
公开(公告)日:2014-02-13
A process for the preparation of 4,6-dihalopyrimidin-5-aminesof formula (II), or salts thereof, which comprises reacting 5-aminopyrimidin-4,6-diols of formula (III), or salts thereof, or a solvate either of the compound of formula (III) or of a salt thereof, with a halogenating agent, new intermediates useful in the preparation of the compound of formula (II) and processes for the preparation of these intermediates. The invention also refers to a process for the preparation of ticagrelor or a pharmaceutically acceptable saltthereoffrom 4,6-dihalo-2- (propylthio)pyrimidin-5-amine of formula (IIA).
[EN] METHOD FOR PREPARATION OF CHLORINATED S-PROPYLTHIOBARBITURIC ACID<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDE S-PROPYLTHIOBARBITURIQUE CHLORÉ
申请人:LONZA AG
公开号:WO2019016111A1
公开(公告)日:2019-01-24
The invention discloses a method for preparation of 4,6-dichloro-5-nitro-2- (propylthio)pyrimidine by conversion of 5-nitro-2-propylthiopyrimidine-4,6-diol with phosgene in the presence of DMF.