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    • 1. 发明申请
    • RACEMIZATION PROCESS FOR THE PREPARATION OF AN INTERMEDIATE OF CLOPIDOGREL HYDROGEN SULPHATE
    • 制备柠檬酸氢硫酸盐中间体的制备方法
    • WO2009077797A1
    • 2009-06-25
    • PCT/HU2008/000148
    • 2008-12-11
    • RICHTER GEDEON NYRT.GARADNAY, SándorNEU, József
    • GARADNAY, SándorNEU, József
    • C07D495/04
    • C07D495/04
    • The invention relates to a process for the preparation of the pharmaceutically applicable methyl (S)-(+)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)- acetate hydrogen sulphate (also known as S-(+)-clopidogrel hydrogen sulphate) of formula (I) comprising racemizing methyl (R)-(-)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine- 5(4H)-acetate or methyl (S)-(+)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)- acetate, or a mixture thereof in any proportion with a weak base in the presence of an organic solvent, converting the methyl (R,S)-(±)-α-(2-chlorophenyl)-6,7-dihydrothieno [3,2-c]pyridine-5(4H)-acetate of fomula (II) obtained to its sulphuric acid addition salt methyl (R,S)-(±)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetate hydrogen sulphate and converting it to methyl (S)-(+)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c] pyridine-5(4H)-acetate hydrogen sulphate of formula (I) by known manner.
    • 本发明涉及制备药学上可应用的(S) - (+) - (2-氯苯基)-6,7-二氢噻吩并[3,2-c]吡啶-5(4H) - 乙酸甲酯 包含外消旋化(R) - ( - ) - α-(2-氯苯基)-6,7-二氢噻吩并〔3,2-二氯苯并噻唑〕甲磺酸的式(I)的硫酸氢盐(也称为S - (+)氯吡格雷硫酸氢盐) c]吡啶-5(4H) - 乙酸酯或(S) - (+) - α-(2-氯苯基)-6,7-二氢噻吩并[3,2-c]吡啶-5(4H) - 乙酸甲酯或 在有机溶剂的存在下与弱碱的任何比例的混合物,将(R,S) - (±) - ((2-氯苯基)-6,7-二氢噻吩并[3,2-c (R)S - (±) - ((2-氯苯基)-6,7-二氢噻吩并[3,2- c]吡啶-5(4H) - 乙酸硫酸氢盐并将其转化为(S) - (+) - α-(2-氯苯基)-6,7-二氢噻吩并[3,2-c]吡啶-5 ) - 乙酸乙酯式(I)硫酸氢盐。