[EN] SYNTHESIS OF (4-FLUORO-3-PIPERIDIN-4-YL-BENZYL)-CARBAMIC ACID TERT-BUTYL ESTER AND INTERMEDIATES THEREOF<br/>[FR] SYNTHÈSE DE L'ESTER TERT-BUTYLIQUE DE L'ACIDE (4-FLUORO-3-PIPÉRIDIN-4-YL-BENZYL)-CARBAMIQUE ET INTERMÉDIAIRES CORRESPONDANTS
申请人:SANOFI AVENTIS US LLC
公开号:WO2011037947A1
公开(公告)日:2011-03-31
The present invention is an improved method for the preparation of 4-fluoro-3-piperidin-4-yl-benzyl)-carbamic acid tert-butyl ester, compound of formula I. The invention is directed to a method of synthesis for the compound of formula I in three steps, comprising formation of 5-((tert-butoxycarbonyl)aminomethyl)-2-fluorobenzeneboronic acid (compound 11), reaction of compound 11 under Suzuki coupling conditions to yield (4-fluoro-2-pyridin-4-yl-benzyl)-carbamic acid tert-butyl ester and selective hydrogenation of the aforementioned product under hydrogenation conditions yields compound I. The invention is also directed to the intermediates 5-((tert-Butoxycarbonyl)amino-methyl)-2-fluorobenzeneboronic acid (compound 11), and (4-fluoro-2-pyridin-4-yl-benzyl)-carbamic acid tert-butyl ester (compound 13).
该发明是一种改进的制备4-氟-3-哌啶-4-基苄基)氨基甲酸叔丁酯(化合物I)的方法。该发明涉及一种合成化合物I的三步方法,包括形成5-((叔丁氧羰基)氨甲基)-2-氟苯硼酸(化合物11),将化合物11在铜促进的Suzuki偶联条件下反应,得到(4-氟-2-吡啶-4-基苄基)氨基甲酸叔丁酯,并在氢化条件下选择性氢化上述产物得到化合物I。该发明还涉及中间体5-((叔丁氧羰基)氨基甲基)-2-氟苯硼酸(化合物11)和(4-氟-2-吡啶-4-基苄基)氨基甲酸叔丁酯(化合物13)。