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).
本发明是一种改进的制备4-
氟-3-
哌啶-4-基苯
甲酸叔丁酯(化合物I)的方法。该发明涉及一种由三步合成化合物I的方法,包括形成5-((叔丁氧羰基)
氨甲基)-2-
氟苯硼酸(化合物11),在Suzuki偶联条件下反应化合物11以得到(4-
氟-2-
吡啶-4-基苯
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)
氨甲基)-2-
氟苯硼酸(化合物11)和(4-
氟-2-
吡啶-4-基苯
甲酸叔丁酯)(化合物13)。