[EN] EFFICIENT PROCESS FOR THE PREPARATION OF SITAGLIPTIN THROUGH A VERY EFFECTIVE PREPARATION OF THE INTERMEDIATE 2,4,5-TRIFLUOROPHENYLACETIC ACID [FR] PROCÉDÉ EFFICACE POUR LA PRÉPARATION DE SITAGLIPTINE PAR UNE PRÉPARATION TRÈS EFFICACE DE L'ACIDE 2,4,5-TRIFLUOROPHÉNYLACÉTIQUE INTERMÉDIAIRE
[EN] EFFICIENT PROCESS FOR THE PREPARATION OF SITAGLIPTIN THROUGH A VERY EFFECTIVE PREPARATION OF THE INTERMEDIATE 2,4,5-TRIFLUOROPHENYLACETIC ACID [FR] PROCÉDÉ EFFICACE POUR LA PRÉPARATION DE SITAGLIPTINE PAR UNE PRÉPARATION TRÈS EFFICACE DE L'ACIDE 2,4,5-TRIFLUOROPHÉNYLACÉTIQUE INTERMÉDIAIRE
Process for the preparation of fluorinated benzoic acids
申请人:Cassella Aktiengesellschaft
公开号:US05093529A1
公开(公告)日:1992-03-03
In the process for the preparation of fluorinated benzoic acids of the formula I ##STR1## in which X and Y, for example, independently of one another denote chlorine or fluorine and X moreover denotes bromine, a fluorinated chloroacetophenone of the formula II ##STR2## in which Z denotes chlorine or hydrogen, is reacted with a hypohalite.
Verfahren zur Herstellung von fluorierten Benzoesäuren
申请人:RIEDEL-DE HAEN AKTIENGESELLSCHAFT
公开号:EP0411252A1
公开(公告)日:1991-02-06
Bei dem Verfahren zur Herstellung von fluorierten Benzoesäuren der Formel I
worin X und Y z.B. unabhängig voneinander Chlor oder Fluor und X darüberhinaus auch Brom bedeuten, wird ein fluoriertes Chloracetophenon der Formel II
worin Z Chlor oder Wasserstoff bedeutet, mit einem Hypohalogenit umgesetzt.
在制备式 I 的氟化苯甲酸的过程中
式 II 的氟化氯代苯乙酮,其中 X 和 Y 分别是氯或氟,X 也是溴。
其中 Z 是氯或氢,与次卤酸反应。
EFFICIENT PROCESS FOR THE PREPARATION OF SITAGLIPTIN THROUGH A VERY EFFECTIVE PREPARATION OF THE INTERMEDIATE 2,4,5-TRIFLUOROPHENYLACETIC ACID
申请人:F.I.S.- Fabbrica Italiana Sintetici S.p.A.
公开号:EP3424927A1
公开(公告)日:2019-01-09
Object of the present invention is an efficient process for the preparation of the active pharmaceutical ingredient Sitagliptine and the 2,4,5-trifluorophenylacetic acid (TFAA) and salt thereof, which is a key intermediate for the synthesis of Sitagliptine.
Efficient process for the preparation of sitagliptin through a very effective preparation of the intermediate 2,4,5-trifluorophenylacetic acid
申请人:F.I.S. - FABBRICA ITALIANA SINTETICI S.P.A.
公开号:US10913747B2
公开(公告)日:2021-02-09
Object of the present invention is an efficient process for the preparation of the active pharmaceutical ingredient Sitagliptine and the 2,4,5-trifluorophenylacetic acid (TFAA) and salt thereof, which is a key intermediate for the synthesis of Sitagliptine.