The object of the present invention is a one-pot process for preparing the 2-acetoxy-5-(2-fluoro-α-cyclopropyl-carbonyl-benzyl)-4,5,6,7-tetrahydro-4H-tieno[3,2-c]-pyridine (prasugrel) of the formula (I) by reacting the 5,6,7,7a-tetrahydro-4H-tieno[3,2-c]-pyridine-2-on of the formula (II) with 2-bromo-1-cyclopropyl-2-(2-fluorophenyl)-etanone of the formula (III) or with 2-chloro-l-cyclopropyl-2-(2-fluorphenyl)-etanone of the formula (IIIa) and acetylating of the formed compound of the formula (IV), wherein the reaction is carried out in the presence of an organic base with an acetylation agent without isolating the compound of the formula (IV). The coupling and acetylation are carried out in the presence of the same organic base such as triethylamine, N,N-diisopropyl-ethylamine or pyridine. At the end of the process the prasugrel of the formula (I) is purified by recrystallization from an organic solvent or a mixture of solvents.
本发明的对象是通过将式(II)的5,6,7,7a-四
氢-4H-
噻吩[3,2-c]-
吡啶-2-
酮与式(III)的2-
溴-1-环丙基-2-(2-
氟苯基)-乙
酮或与式(IIIa)的2-
氯-1-环丙基-2-(2-
氟苯基)-乙
酮反应,并使生成的化合物(IV)乙酰化,从而制备式(I)的2-乙酰
氧基-5-(2-
氟-α-环丙基-羰基
苯基)-4,5,6,7-四
氢-4H-
噻吩[3,2-c]-
吡啶(prasugrel)的一锅法工艺,其中在有机碱和乙酰化剂的存在下进行反应,而无需分离式(IV)的化合物。偶联和乙酰化是在存在相同有机碱的情况下进行的,例如
三乙胺、
N,N-二异丙基乙胺或
吡啶。在过程结束时,通过从有机溶剂或溶剂混合物中再结晶来纯化式(I)的prasugrel。