申请人:F.I.S.- Fabbrica Italiana Sintetici S.p.A.
公开号:EP3524605A1
公开(公告)日:2019-08-14
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:
A) cyanation of 2,4,5-trifluorobenzoyl fluoride of formula (III):
to give the compound of formula (IV):
B) conversion of the compound of formula (IV) prepared in the step A) to the compound of formula (V):
C) reduction of the compound of formula (V) prepared in the step B) to the compound of formula (II):
D) conversion of 2,4,5-trifluorophenylacetic acid of formula (II) obtained in the step C) to Sitagliptin of formula (I) or salt thereof.
本发明的目的是制备活性药物成分西格列汀和 2,4,5-三氟苯乙酸(TFAA)及其盐的高效工艺,后者是合成西格列汀的关键中间体:
A) 式(III)的 2,4,5-三氟苯甲酰基氟的氰化:
得到式(IV)化合物:
B)将步骤 A)中制备的式(IV)化合物转化为式(V)化合物:
C) 将步骤 B 中制备的式 (V) 化合物还原为式 (II) 化合物:)
D)将步骤 C)中得到的式(II)的 2,4,5-三氟苯乙酸转化为式(I)的西他列汀或其盐。